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llvm-project/llvm/test/Transforms/InstCombine/icmp.ll

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
target datalayout = "e-p:64:64:64-p1:16:16:16-p2:32:32:32-p3:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
define i32 @test1(i32 %X) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: [[X_LOBIT:%.*]] = lshr i32 %X, 31
; CHECK-NEXT: ret i32 [[X_LOBIT]]
;
%a = icmp slt i32 %X, 0
%b = zext i1 %a to i32
ret i32 %b
}
define <2 x i32> @test1vec(<2 x i32> %X) {
; CHECK-LABEL: @test1vec(
; CHECK-NEXT: [[X_LOBIT:%.*]] = lshr <2 x i32> [[X:%.*]], <i32 31, i32 31>
; CHECK-NEXT: ret <2 x i32> [[X_LOBIT]]
;
%a = icmp slt <2 x i32> %X, zeroinitializer
%b = zext <2 x i1> %a to <2 x i32>
ret <2 x i32> %b
}
define i32 @test2(i32 %X) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: [[X_LOBIT:%.*]] = lshr i32 %X, 31
; CHECK-NEXT: [[X_LOBIT_NOT:%.*]] = xor i32 [[X_LOBIT]], 1
; CHECK-NEXT: ret i32 [[X_LOBIT_NOT]]
;
%a = icmp ult i32 %X, -2147483648
%b = zext i1 %a to i32
ret i32 %b
}
define <2 x i32> @test2vec(<2 x i32> %X) {
; CHECK-LABEL: @test2vec(
; CHECK-NEXT: [[X_LOBIT:%.*]] = lshr <2 x i32> [[X:%.*]], <i32 31, i32 31>
; CHECK-NEXT: [[X_LOBIT_NOT:%.*]] = xor <2 x i32> [[X_LOBIT]], <i32 1, i32 1>
; CHECK-NEXT: ret <2 x i32> [[X_LOBIT_NOT]]
;
%a = icmp ult <2 x i32> %X, <i32 -2147483648, i32 -2147483648>
%b = zext <2 x i1> %a to <2 x i32>
ret <2 x i32> %b
}
define i32 @test3(i32 %X) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: [[X_LOBIT:%.*]] = ashr i32 %X, 31
; CHECK-NEXT: ret i32 [[X_LOBIT]]
;
%a = icmp slt i32 %X, 0
%b = sext i1 %a to i32
ret i32 %b
}
define i32 @test4(i32 %X) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: [[X_LOBIT:%.*]] = ashr i32 %X, 31
; CHECK-NEXT: [[X_LOBIT_NOT:%.*]] = xor i32 [[X_LOBIT]], -1
; CHECK-NEXT: ret i32 [[X_LOBIT_NOT]]
;
%a = icmp ult i32 %X, -2147483648
%b = sext i1 %a to i32
ret i32 %b
}
; PR4837
define <2 x i1> @test5(<2 x i64> %x) {
; CHECK-LABEL: @test5(
; CHECK-NEXT: ret <2 x i1> <i1 true, i1 true>
;
%V = icmp eq <2 x i64> %x, undef
ret <2 x i1> %V
}
define i32 @test6(i32 %a, i32 %b) {
; CHECK-LABEL: @test6(
; CHECK-NEXT: [[E:%.*]] = ashr i32 %a, 31
; CHECK-NEXT: [[F:%.*]] = and i32 [[E]], %b
; CHECK-NEXT: ret i32 [[F]]
;
%c = icmp sle i32 %a, -1
%d = zext i1 %c to i32
%e = sub i32 0, %d
%f = and i32 %e, %b
ret i32 %f
}
define i1 @test7(i32 %x) {
; CHECK-LABEL: @test7(
; CHECK-NEXT: [[B:%.*]] = icmp ne i32 %x, 0
; CHECK-NEXT: ret i1 [[B]]
;
%a = add i32 %x, -1
%b = icmp ult i32 %a, %x
ret i1 %b
}
define i1 @test8(i32 %x) {
; CHECK-LABEL: @test8(
; CHECK-NEXT: ret i1 false
;
%a = add i32 %x, -1
%b = icmp eq i32 %a, %x
ret i1 %b
}
define i1 @test9(i32 %x) {
; CHECK-LABEL: @test9(
; CHECK-NEXT: [[B:%.*]] = icmp ugt i32 %x, 1
; CHECK-NEXT: ret i1 [[B]]
;
%a = add i32 %x, -2
%b = icmp ugt i32 %x, %a
ret i1 %b
}
define i1 @test10(i32 %x) {
; CHECK-LABEL: @test10(
; CHECK-NEXT: [[B:%.*]] = icmp ne i32 %x, -2147483648
; CHECK-NEXT: ret i1 [[B]]
;
%a = add i32 %x, -1
%b = icmp slt i32 %a, %x
ret i1 %b
}
define i1 @test11(i32 %x) {
; CHECK-LABEL: @test11(
; CHECK-NEXT: ret i1 true
;
%a = add nsw i32 %x, 8
%b = icmp slt i32 %x, %a
ret i1 %b
}
; PR6195
define i1 @test12(i1 %A) {
; CHECK-LABEL: @test12(
; CHECK-NEXT: [[NOT_A:%.*]] = xor i1 %A, true
; CHECK-NEXT: ret i1 [[NOT_A]]
;
%S = select i1 %A, i64 -4294967295, i64 8589934591
%B = icmp ne i64 bitcast (<2 x i32> <i32 1, i32 -1> to i64), %S
ret i1 %B
}
; PR6481
define i1 @test13(i8 %X) {
; CHECK-LABEL: @test13(
; CHECK-NEXT: ret i1 false
;
%cmp = icmp slt i8 undef, %X
ret i1 %cmp
}
define i1 @test14(i8 %X) {
; CHECK-LABEL: @test14(
; CHECK-NEXT: ret i1 false
;
%cmp = icmp slt i8 undef, -128
ret i1 %cmp
}
define i1 @test15() {
; CHECK-LABEL: @test15(
; CHECK-NEXT: ret i1 undef
;
%cmp = icmp eq i8 undef, -128
ret i1 %cmp
}
define i1 @test16() {
; CHECK-LABEL: @test16(
; CHECK-NEXT: ret i1 undef
;
%cmp = icmp ne i8 undef, -128
ret i1 %cmp
}
define i1 @test17(i32 %x) {
; CHECK-LABEL: @test17(
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 %x, 3
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 1, %x
%and = and i32 %shl, 8
%cmp = icmp eq i32 %and, 0
ret i1 %cmp
}
define <2 x i1> @test17vec(<2 x i32> %x) {
; CHECK-LABEL: @test17vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp ne <2 x i32> %x, <i32 3, i32 3>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%shl = shl <2 x i32> <i32 1, i32 1>, %x
%and = and <2 x i32> %shl, <i32 8, i32 8>
%cmp = icmp eq <2 x i32> %and, zeroinitializer
ret <2 x i1> %cmp
}
define i1 @test17a(i32 %x) {
; CHECK-LABEL: @test17a(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 %x, 2
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 1, %x
%and = and i32 %shl, 7
%cmp = icmp eq i32 %and, 0
ret i1 %cmp
}
define <2 x i1> @test17a_vec(<2 x i32> %x) {
; CHECK-LABEL: @test17a_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt <2 x i32> %x, <i32 2, i32 2>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%shl = shl <2 x i32> <i32 1, i32 1>, %x
%and = and <2 x i32> %shl, <i32 7, i32 7>
%cmp = icmp eq <2 x i32> %and, zeroinitializer
ret <2 x i1> %cmp
}
define i1 @test18_eq(i32 %x) {
; CHECK-LABEL: @test18_eq(
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 %x, 3
; CHECK-NEXT: ret i1 [[CMP]]
;
%sh = lshr i32 8, %x
%and = and i32 %sh, 1
%cmp = icmp eq i32 %and, 0
ret i1 %cmp
}
define <2 x i1> @test18_eq_vec(<2 x i32> %x) {
; CHECK-LABEL: @test18_eq_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp ne <2 x i32> %x, <i32 3, i32 3>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%sh = lshr <2 x i32> <i32 8, i32 8>, %x
%and = and <2 x i32> %sh, <i32 1, i32 1>
%cmp = icmp eq <2 x i32> %and, zeroinitializer
ret <2 x i1> %cmp
}
define i1 @test18_ne(i32 %x) {
; CHECK-LABEL: @test18_ne(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 %x, 3
; CHECK-NEXT: ret i1 [[CMP]]
;
%sh = lshr i32 8, %x
%and = and i32 %sh, 1
%cmp = icmp ne i32 %and, 0
ret i1 %cmp
}
define <2 x i1> @test18_ne_vec(<2 x i32> %x) {
; CHECK-LABEL: @test18_ne_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq <2 x i32> %x, <i32 3, i32 3>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%sh = lshr <2 x i32> <i32 8, i32 8>, %x
%and = and <2 x i32> %sh, <i32 1, i32 1>
%cmp = icmp ne <2 x i32> %and, zeroinitializer
ret <2 x i1> %cmp
}
define i1 @test19(i32 %x) {
; CHECK-LABEL: @test19(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 %x, 3
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 1, %x
%and = and i32 %shl, 8
%cmp = icmp eq i32 %and, 8
ret i1 %cmp
}
define <2 x i1> @test19vec(<2 x i32> %x) {
; CHECK-LABEL: @test19vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq <2 x i32> %x, <i32 3, i32 3>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%shl = shl <2 x i32> <i32 1, i32 1>, %x
%and = and <2 x i32> %shl, <i32 8, i32 8>
%cmp = icmp eq <2 x i32> %and, <i32 8, i32 8>
ret <2 x i1> %cmp
}
define <2 x i1> @cmp_and_signbit_vec(<2 x i3> %x) {
; CHECK-LABEL: @cmp_and_signbit_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp slt <2 x i3> %x, zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%and = and <2 x i3> %x, <i3 4, i3 4>
%cmp = icmp ne <2 x i3> %and, zeroinitializer
ret <2 x i1> %cmp
}
define i1 @test20(i32 %x) {
; CHECK-LABEL: @test20(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 %x, 3
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 1, %x
%and = and i32 %shl, 8
%cmp = icmp ne i32 %and, 0
ret i1 %cmp
}
define <2 x i1> @test20vec(<2 x i32> %x) {
; CHECK-LABEL: @test20vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq <2 x i32> %x, <i32 3, i32 3>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%shl = shl <2 x i32> <i32 1, i32 1>, %x
%and = and <2 x i32> %shl, <i32 8, i32 8>
%cmp = icmp ne <2 x i32> %and, zeroinitializer
ret <2 x i1> %cmp
}
define i1 @test20a(i32 %x) {
; CHECK-LABEL: @test20a(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 %x, 3
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 1, %x
%and = and i32 %shl, 7
%cmp = icmp ne i32 %and, 0
ret i1 %cmp
}
define <2 x i1> @test20a_vec(<2 x i32> %x) {
; CHECK-LABEL: @test20a_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult <2 x i32> %x, <i32 3, i32 3>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%shl = shl <2 x i32> <i32 1, i32 1>, %x
%and = and <2 x i32> %shl, <i32 7, i32 7>
%cmp = icmp ne <2 x i32> %and, zeroinitializer
ret <2 x i1> %cmp
}
define i1 @test21(i8 %x, i8 %y) {
; CHECK-LABEL: @test21(
; CHECK-NEXT: [[B:%.*]] = icmp ugt i8 %x, 3
; CHECK-NEXT: ret i1 [[B]]
;
%A = or i8 %x, 1
%B = icmp ugt i8 %A, 3
ret i1 %B
}
define i1 @test22(i8 %x, i8 %y) {
; CHECK-LABEL: @test22(
; CHECK-NEXT: [[B:%.*]] = icmp ult i8 %x, 4
; CHECK-NEXT: ret i1 [[B]]
;
%A = or i8 %x, 1
%B = icmp ult i8 %A, 4
ret i1 %B
}
; PR2740
define i1 @test23(i32 %x) {
; CHECK-LABEL: @test23(
; CHECK-NEXT: [[I4:%.*]] = icmp sgt i32 %x, 1328634634
; CHECK-NEXT: ret i1 [[I4]]
;
%i3 = sdiv i32 %x, -1328634635
%i4 = icmp eq i32 %i3, -1
ret i1 %i4
}
define <2 x i1> @test23vec(<2 x i32> %x) {
; CHECK-LABEL: @test23vec(
; CHECK-NEXT: [[I4:%.*]] = icmp sgt <2 x i32> %x, <i32 1328634634, i32 1328634634>
; CHECK-NEXT: ret <2 x i1> [[I4]]
;
%i3 = sdiv <2 x i32> %x, <i32 -1328634635, i32 -1328634635>
%i4 = icmp eq <2 x i32> %i3, <i32 -1, i32 -1>
ret <2 x i1> %i4
}
@X = global [1000 x i32] zeroinitializer
; PR8882
define i1 @test24(i64 %i) {
; CHECK-LABEL: @test24(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 %i, 1000
; CHECK-NEXT: ret i1 [[CMP]]
;
%p1 = getelementptr inbounds i32, i32* getelementptr inbounds ([1000 x i32], [1000 x i32]* @X, i64 0, i64 0), i64 %i
%cmp = icmp eq i32* %p1, getelementptr inbounds ([1000 x i32], [1000 x i32]* @X, i64 1, i64 0)
ret i1 %cmp
}
@X_as1 = addrspace(1) global [1000 x i32] zeroinitializer
define i1 @test24_as1(i64 %i) {
; CHECK-LABEL: @test24_as1(
; CHECK-NEXT: [[TMP1:%.*]] = trunc i64 %i to i16
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i16 [[TMP1]], 1000
; CHECK-NEXT: ret i1 [[CMP]]
;
%p1 = getelementptr inbounds i32, i32 addrspace(1)* getelementptr inbounds ([1000 x i32], [1000 x i32] addrspace(1)* @X_as1, i64 0, i64 0), i64 %i
%cmp = icmp eq i32 addrspace(1)* %p1, getelementptr inbounds ([1000 x i32], [1000 x i32] addrspace(1)* @X_as1, i64 1, i64 0)
ret i1 %cmp
}
define i1 @test25(i32 %x, i32 %y, i32 %z) {
; CHECK-LABEL: @test25(
; CHECK-NEXT: [[C:%.*]] = icmp sgt i32 %x, %y
; CHECK-NEXT: ret i1 [[C]]
;
%lhs = add nsw i32 %x, %z
%rhs = add nsw i32 %y, %z
%c = icmp sgt i32 %lhs, %rhs
ret i1 %c
}
; X + Z > Y + Z -> X > Y if there is no overflow.
define i1 @test26(i32 %x, i32 %y, i32 %z) {
; CHECK-LABEL: @test26(
; CHECK-NEXT: [[C:%.*]] = icmp ugt i32 %x, %y
; CHECK-NEXT: ret i1 [[C]]
;
%lhs = add nuw i32 %x, %z
%rhs = add nuw i32 %y, %z
%c = icmp ugt i32 %lhs, %rhs
ret i1 %c
}
; X - Z > Y - Z -> X > Y if there is no overflow.
define i1 @test27(i32 %x, i32 %y, i32 %z) {
; CHECK-LABEL: @test27(
; CHECK-NEXT: [[C:%.*]] = icmp sgt i32 %x, %y
; CHECK-NEXT: ret i1 [[C]]
;
%lhs = sub nsw i32 %x, %z
%rhs = sub nsw i32 %y, %z
%c = icmp sgt i32 %lhs, %rhs
ret i1 %c
}
; X - Z > Y - Z -> X > Y if there is no overflow.
define i1 @test28(i32 %x, i32 %y, i32 %z) {
; CHECK-LABEL: @test28(
; CHECK-NEXT: [[C:%.*]] = icmp ugt i32 %x, %y
; CHECK-NEXT: ret i1 [[C]]
;
%lhs = sub nuw i32 %x, %z
%rhs = sub nuw i32 %y, %z
%c = icmp ugt i32 %lhs, %rhs
ret i1 %c
}
; X + Y > X -> Y > 0 if there is no overflow.
define i1 @test29(i32 %x, i32 %y) {
; CHECK-LABEL: @test29(
; CHECK-NEXT: [[C:%.*]] = icmp sgt i32 %y, 0
; CHECK-NEXT: ret i1 [[C]]
;
%lhs = add nsw i32 %x, %y
%c = icmp sgt i32 %lhs, %x
ret i1 %c
}
; X + Y > X -> Y > 0 if there is no overflow.
define i1 @test30(i32 %x, i32 %y) {
; CHECK-LABEL: @test30(
; CHECK-NEXT: [[C:%.*]] = icmp ne i32 %y, 0
; CHECK-NEXT: ret i1 [[C]]
;
%lhs = add nuw i32 %x, %y
%c = icmp ugt i32 %lhs, %x
ret i1 %c
}
; X > X + Y -> 0 > Y if there is no overflow.
define i1 @test31(i32 %x, i32 %y) {
; CHECK-LABEL: @test31(
; CHECK-NEXT: [[C:%.*]] = icmp slt i32 %y, 0
; CHECK-NEXT: ret i1 [[C]]
;
%rhs = add nsw i32 %x, %y
%c = icmp sgt i32 %x, %rhs
ret i1 %c
}
; X > X + Y -> 0 > Y if there is no overflow.
define i1 @test32(i32 %x, i32 %y) {
; CHECK-LABEL: @test32(
; CHECK-NEXT: ret i1 false
;
%rhs = add nuw i32 %x, %y
%c = icmp ugt i32 %x, %rhs
ret i1 %c
}
; X - Y > X -> 0 > Y if there is no overflow.
define i1 @test33(i32 %x, i32 %y) {
; CHECK-LABEL: @test33(
; CHECK-NEXT: [[C:%.*]] = icmp slt i32 %y, 0
; CHECK-NEXT: ret i1 [[C]]
;
%lhs = sub nsw i32 %x, %y
%c = icmp sgt i32 %lhs, %x
ret i1 %c
}
; X - Y > X -> 0 > Y if there is no overflow.
define i1 @test34(i32 %x, i32 %y) {
; CHECK-LABEL: @test34(
; CHECK-NEXT: ret i1 false
;
%lhs = sub nuw i32 %x, %y
%c = icmp ugt i32 %lhs, %x
ret i1 %c
}
; X > X - Y -> Y > 0 if there is no overflow.
define i1 @test35(i32 %x, i32 %y) {
; CHECK-LABEL: @test35(
; CHECK-NEXT: [[C:%.*]] = icmp sgt i32 %y, 0
; CHECK-NEXT: ret i1 [[C]]
;
%rhs = sub nsw i32 %x, %y
%c = icmp sgt i32 %x, %rhs
ret i1 %c
}
; X > X - Y -> Y > 0 if there is no overflow.
define i1 @test36(i32 %x, i32 %y) {
; CHECK-LABEL: @test36(
; CHECK-NEXT: [[C:%.*]] = icmp ne i32 %y, 0
; CHECK-NEXT: ret i1 [[C]]
;
%rhs = sub nuw i32 %x, %y
%c = icmp ugt i32 %x, %rhs
ret i1 %c
}
; PR36969 - https://bugs.llvm.org/show_bug.cgi?id=36969
define i1 @ugt_sub(i32 %xsrc, i32 %y) {
; CHECK-LABEL: @ugt_sub(
; CHECK-NEXT: [[X:%.*]] = udiv i32 [[XSRC:%.*]], 42
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[X]], [[Y:%.*]]
; CHECK-NEXT: ret i1 [[CMP]]
;
%x = udiv i32 %xsrc, 42 ; thwart complexity-based canonicalization
%sub = sub i32 %x, %y
%cmp = icmp ugt i32 %sub, %x
ret i1 %cmp
}
; Swap operands and predicate. Try a vector type to verify that works too.
define <2 x i1> @ult_sub(<2 x i8> %xsrc, <2 x i8> %y) {
; CHECK-LABEL: @ult_sub(
; CHECK-NEXT: [[X:%.*]] = udiv <2 x i8> [[XSRC:%.*]], <i8 42, i8 -42>
; CHECK-NEXT: [[CMP:%.*]] = icmp ult <2 x i8> [[X]], [[Y:%.*]]
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%x = udiv <2 x i8> %xsrc, <i8 42, i8 -42> ; thwart complexity-based canonicalization
%sub = sub <2 x i8> %x, %y
%cmp = icmp ult <2 x i8> %x, %sub
ret <2 x i1> %cmp
}
; X - Y > X - Z -> Z > Y if there is no overflow.
define i1 @test37(i32 %x, i32 %y, i32 %z) {
; CHECK-LABEL: @test37(
; CHECK-NEXT: [[C:%.*]] = icmp sgt i32 %z, %y
; CHECK-NEXT: ret i1 [[C]]
;
%lhs = sub nsw i32 %x, %y
%rhs = sub nsw i32 %x, %z
%c = icmp sgt i32 %lhs, %rhs
ret i1 %c
}
; X - Y > X - Z -> Z > Y if there is no overflow.
define i1 @test38(i32 %x, i32 %y, i32 %z) {
; CHECK-LABEL: @test38(
; CHECK-NEXT: [[C:%.*]] = icmp ugt i32 %z, %y
; CHECK-NEXT: ret i1 [[C]]
;
%lhs = sub nuw i32 %x, %y
%rhs = sub nuw i32 %x, %z
%c = icmp ugt i32 %lhs, %rhs
ret i1 %c
}
; PR9343 #1
define i1 @test39(i32 %X, i32 %Y) {
; CHECK-LABEL: @test39(
; CHECK-NEXT: [[B:%.*]] = icmp eq i32 %X, 0
; CHECK-NEXT: ret i1 [[B]]
;
%A = ashr exact i32 %X, %Y
%B = icmp eq i32 %A, 0
ret i1 %B
}
define <2 x i1> @test39vec(<2 x i32> %X, <2 x i32> %Y) {
; CHECK-LABEL: @test39vec(
; CHECK-NEXT: [[B:%.*]] = icmp eq <2 x i32> %X, zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[B]]
;
%A = ashr exact <2 x i32> %X, %Y
%B = icmp eq <2 x i32> %A, zeroinitializer
ret <2 x i1> %B
}
define i1 @test40(i32 %X, i32 %Y) {
; CHECK-LABEL: @test40(
; CHECK-NEXT: [[B:%.*]] = icmp ne i32 %X, 0
; CHECK-NEXT: ret i1 [[B]]
;
%A = lshr exact i32 %X, %Y
%B = icmp ne i32 %A, 0
ret i1 %B
}
define <2 x i1> @test40vec(<2 x i32> %X, <2 x i32> %Y) {
; CHECK-LABEL: @test40vec(
; CHECK-NEXT: [[B:%.*]] = icmp ne <2 x i32> %X, zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[B]]
;
%A = lshr exact <2 x i32> %X, %Y
%B = icmp ne <2 x i32> %A, zeroinitializer
ret <2 x i1> %B
}
define i1 @shr_exact(i132 %x) {
; CHECK-LABEL: @shr_exact(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i132 %x, 32
; CHECK-NEXT: ret i1 [[CMP]]
;
%sh = ashr exact i132 %x, 4
%cmp = icmp eq i132 %sh, 2
ret i1 %cmp
}
define <2 x i1> @shr_exact_vec(<2 x i132> %x) {
; CHECK-LABEL: @shr_exact_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp ne <2 x i132> %x, <i132 32, i132 32>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%sh = lshr exact <2 x i132> %x, <i132 4, i132 4>
%cmp = icmp ne <2 x i132> %sh, <i132 2, i132 2>
ret <2 x i1> %cmp
}
; PR9343 #3
define i1 @test41(i32 %X, i32 %Y) {
; CHECK-LABEL: @test41(
; CHECK-NEXT: ret i1 true
;
%A = urem i32 %X, %Y
%B = icmp ugt i32 %Y, %A
ret i1 %B
}
define i1 @test42(i32 %X, i32 %Y) {
; CHECK-LABEL: @test42(
; CHECK-NEXT: [[B:%.*]] = icmp sgt i32 %Y, -1
; CHECK-NEXT: ret i1 [[B]]
;
%A = srem i32 %X, %Y
%B = icmp slt i32 %A, %Y
ret i1 %B
}
define i1 @test43(i32 %X, i32 %Y) {
; CHECK-LABEL: @test43(
; CHECK-NEXT: [[B:%.*]] = icmp slt i32 %Y, 0
; CHECK-NEXT: ret i1 [[B]]
;
%A = srem i32 %X, %Y
%B = icmp slt i32 %Y, %A
ret i1 %B
}
define i1 @test44(i32 %X, i32 %Y) {
; CHECK-LABEL: @test44(
; CHECK-NEXT: [[B:%.*]] = icmp sgt i32 %Y, -1
; CHECK-NEXT: ret i1 [[B]]
;
%A = srem i32 %X, %Y
%B = icmp slt i32 %A, %Y
ret i1 %B
}
define i1 @test45(i32 %X, i32 %Y) {
; CHECK-LABEL: @test45(
; CHECK-NEXT: [[B:%.*]] = icmp slt i32 %Y, 0
; CHECK-NEXT: ret i1 [[B]]
;
%A = srem i32 %X, %Y
%B = icmp slt i32 %Y, %A
ret i1 %B
}
; PR9343 #4
define i1 @test46(i32 %X, i32 %Y, i32 %Z) {
; CHECK-LABEL: @test46(
; CHECK-NEXT: [[C:%.*]] = icmp ult i32 %X, %Y
; CHECK-NEXT: ret i1 [[C]]
;
%A = ashr exact i32 %X, %Z
%B = ashr exact i32 %Y, %Z
%C = icmp ult i32 %A, %B
ret i1 %C
}
; PR9343 #5
define i1 @test47(i32 %X, i32 %Y, i32 %Z) {
; CHECK-LABEL: @test47(
; CHECK-NEXT: [[C:%.*]] = icmp ugt i32 %X, %Y
; CHECK-NEXT: ret i1 [[C]]
;
%A = ashr exact i32 %X, %Z
%B = ashr exact i32 %Y, %Z
%C = icmp ugt i32 %A, %B
ret i1 %C
}
; PR9343 #8
define i1 @test48(i32 %X, i32 %Y, i32 %Z) {
; CHECK-LABEL: @test48(
; CHECK-NEXT: [[C:%.*]] = icmp eq i32 %X, %Y
; CHECK-NEXT: ret i1 [[C]]
;
%A = sdiv exact i32 %X, %Z
%B = sdiv exact i32 %Y, %Z
%C = icmp eq i32 %A, %B
ret i1 %C
}
; The above transform only works for equality predicates.
define i1 @PR32949(i32 %X, i32 %Y, i32 %Z) {
; CHECK-LABEL: @PR32949(
; CHECK-NEXT: [[A:%.*]] = sdiv exact i32 %X, %Z
; CHECK-NEXT: [[B:%.*]] = sdiv exact i32 %Y, %Z
; CHECK-NEXT: [[C:%.*]] = icmp sgt i32 [[A]], [[B]]
; CHECK-NEXT: ret i1 [[C]]
;
%A = sdiv exact i32 %X, %Z
%B = sdiv exact i32 %Y, %Z
%C = icmp sgt i32 %A, %B
ret i1 %C
}
; PR8469
define <2 x i1> @test49(<2 x i32> %tmp3) {
; CHECK-LABEL: @test49(
; CHECK-NEXT: entry:
; CHECK-NEXT: ret <2 x i1> <i1 true, i1 true>
;
entry:
%tmp11 = and <2 x i32> %tmp3, <i32 3, i32 3>
%cmp = icmp ult <2 x i32> %tmp11, <i32 4, i32 4>
ret <2 x i1> %cmp
}
; PR9343 #7
define i1 @test50(i16 %X, i32 %Y) {
; CHECK-LABEL: @test50(
; CHECK-NEXT: ret i1 true
;
%A = zext i16 %X to i32
%B = srem i32 %A, %Y
%C = icmp sgt i32 %B, -1
ret i1 %C
}
define i1 @test51(i32 %X, i32 %Y) {
; CHECK-LABEL: @test51(
; CHECK-NEXT: [[A:%.*]] = and i32 %X, -2147483648
; CHECK-NEXT: [[B:%.*]] = srem i32 [[A]], %Y
; CHECK-NEXT: [[C:%.*]] = icmp sgt i32 [[B]], -1
; CHECK-NEXT: ret i1 [[C]]
;
%A = and i32 %X, 2147483648
%B = srem i32 %A, %Y
%C = icmp sgt i32 %B, -1
ret i1 %C
}
define i1 @test52(i32 %x1) {
; CHECK-LABEL: @test52(
; CHECK-NEXT: [[TMP1:%.*]] = and i32 %x1, 16711935
; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i32 [[TMP1]], 4980863
; CHECK-NEXT: ret i1 [[TMP2]]
;
%conv = and i32 %x1, 255
%cmp = icmp eq i32 %conv, 127
%tmp2 = lshr i32 %x1, 16
%tmp3 = trunc i32 %tmp2 to i8
%cmp15 = icmp eq i8 %tmp3, 76
%A = and i1 %cmp, %cmp15
ret i1 %A
}
define i1 @test52b(i128 %x1) {
; CHECK-LABEL: @test52b(
; CHECK-NEXT: [[TMP1:%.*]] = and i128 [[X1:%.*]], 16711935
; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i128 [[TMP1]], 4980863
; CHECK-NEXT: ret i1 [[TMP2]]
;
%conv = and i128 %x1, 255
%cmp = icmp eq i128 %conv, 127
%tmp2 = lshr i128 %x1, 16
%tmp3 = trunc i128 %tmp2 to i8
%cmp15 = icmp eq i8 %tmp3, 76
%A = and i1 %cmp, %cmp15
ret i1 %A
}
; PR9838
define i1 @test53(i32 %a, i32 %b) {
; CHECK-LABEL: @test53(
; CHECK-NEXT: [[X:%.*]] = sdiv exact i32 %a, 30
; CHECK-NEXT: [[Y:%.*]] = sdiv i32 %b, 30
; CHECK-NEXT: [[Z:%.*]] = icmp eq i32 [[X]], [[Y]]
; CHECK-NEXT: ret i1 [[Z]]
;
%x = sdiv exact i32 %a, 30
%y = sdiv i32 %b, 30
%z = icmp eq i32 %x, %y
ret i1 %z
}
define i1 @test54(i8 %a) {
; CHECK-LABEL: @test54(
; CHECK-NEXT: [[AND:%.*]] = and i8 %a, -64
; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[AND]], -128
; CHECK-NEXT: ret i1 [[RET]]
;
%ext = zext i8 %a to i32
%and = and i32 %ext, 192
%ret = icmp eq i32 %and, 128
ret i1 %ret
}
define i1 @test55(i32 %a) {
; CHECK-LABEL: @test55(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 %a, -123
; CHECK-NEXT: ret i1 [[CMP]]
;
%sub = sub i32 0, %a
%cmp = icmp eq i32 %sub, 123
ret i1 %cmp
}
define <2 x i1> @test55vec(<2 x i32> %a) {
; CHECK-LABEL: @test55vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq <2 x i32> %a, <i32 -123, i32 -123>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%sub = sub <2 x i32> zeroinitializer, %a
%cmp = icmp eq <2 x i32> %sub, <i32 123, i32 123>
ret <2 x i1> %cmp
}
define i1 @test56(i32 %a) {
; CHECK-LABEL: @test56(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 %a, -113
; CHECK-NEXT: ret i1 [[CMP]]
;
%sub = sub i32 10, %a
%cmp = icmp eq i32 %sub, 123
ret i1 %cmp
}
define <2 x i1> @test56vec(<2 x i32> %a) {
; CHECK-LABEL: @test56vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq <2 x i32> %a, <i32 -113, i32 -113>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%sub = sub <2 x i32> <i32 10, i32 10>, %a
%cmp = icmp eq <2 x i32> %sub, <i32 123, i32 123>
ret <2 x i1> %cmp
}
; PR10267 Don't make icmps more expensive when no other inst is subsumed.
declare void @foo(i32)
define i1 @test57(i32 %a) {
; CHECK-LABEL: @test57(
; CHECK-NEXT: [[AND:%.*]] = and i32 %a, -2
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[AND]], 0
; CHECK-NEXT: call void @foo(i32 [[AND]])
; CHECK-NEXT: ret i1 [[CMP]]
;
%and = and i32 %a, -2
%cmp = icmp ne i32 %and, 0
call void @foo(i32 %and)
ret i1 %cmp
}
; rdar://problem/10482509
define zeroext i1 @cmpabs1(i64 %val) {
; CHECK-LABEL: @cmpabs1(
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp ne i64 %val, 0
; CHECK-NEXT: ret i1 [[TOBOOL]]
;
%sub = sub nsw i64 0, %val
%cmp = icmp slt i64 %val, 0
%sub.val = select i1 %cmp, i64 %sub, i64 %val
%tobool = icmp ne i64 %sub.val, 0
ret i1 %tobool
}
define zeroext i1 @cmpabs2(i64 %val) {
; CHECK-LABEL: @cmpabs2(
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp ne i64 %val, 0
; CHECK-NEXT: ret i1 [[TOBOOL]]
;
%sub = sub nsw i64 0, %val
%cmp = icmp slt i64 %val, 0
%sub.val = select i1 %cmp, i64 %val, i64 %sub
%tobool = icmp ne i64 %sub.val, 0
ret i1 %tobool
}
define void @test58() {
; CHECK-LABEL: @test58(
; CHECK-NEXT: [[CALL:%.*]] = call i32 @test58_d(i64 36029346783166592)
; CHECK-NEXT: ret void
;
%cast = bitcast <1 x i64> <i64 36029346783166592> to i64
%call = call i32 @test58_d( i64 %cast)
ret void
}
declare i32 @test58_d(i64)
define i1 @test59(i8* %foo) {
; CHECK-LABEL: @test59(
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds i8, i8* %foo, i64 8
; CHECK-NEXT: [[USE:%.*]] = ptrtoint i8* [[GEP1]] to i64
; CHECK-NEXT: [[CALL:%.*]] = call i32 @test58_d(i64 [[USE]])
; CHECK-NEXT: ret i1 true
;
%bit = bitcast i8* %foo to i32*
%gep1 = getelementptr inbounds i32, i32* %bit, i64 2
%gep2 = getelementptr inbounds i8, i8* %foo, i64 10
%cast1 = bitcast i32* %gep1 to i8*
%cmp = icmp ult i8* %cast1, %gep2
%use = ptrtoint i8* %cast1 to i64
%call = call i32 @test58_d(i64 %use)
ret i1 %cmp
}
define i1 @test59_as1(i8 addrspace(1)* %foo) {
; CHECK-LABEL: @test59_as1(
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds i8, i8 addrspace(1)* %foo, i16 8
; CHECK-NEXT: [[TMP1:%.*]] = ptrtoint i8 addrspace(1)* [[GEP1]] to i16
; CHECK-NEXT: [[USE:%.*]] = zext i16 [[TMP1]] to i64
; CHECK-NEXT: [[CALL:%.*]] = call i32 @test58_d(i64 [[USE]])
; CHECK-NEXT: ret i1 true
;
%bit = bitcast i8 addrspace(1)* %foo to i32 addrspace(1)*
%gep1 = getelementptr inbounds i32, i32 addrspace(1)* %bit, i64 2
%gep2 = getelementptr inbounds i8, i8 addrspace(1)* %foo, i64 10
%cast1 = bitcast i32 addrspace(1)* %gep1 to i8 addrspace(1)*
%cmp = icmp ult i8 addrspace(1)* %cast1, %gep2
%use = ptrtoint i8 addrspace(1)* %cast1 to i64
%call = call i32 @test58_d(i64 %use)
ret i1 %cmp
}
define i1 @test60(i8* %foo, i64 %i, i64 %j) {
; CHECK-LABEL: @test60(
; CHECK-NEXT: [[GEP1_IDX:%.*]] = shl nuw i64 %i, 2
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i64 [[GEP1_IDX]], %j
; CHECK-NEXT: ret i1 [[TMP1]]
;
%bit = bitcast i8* %foo to i32*
%gep1 = getelementptr inbounds i32, i32* %bit, i64 %i
%gep2 = getelementptr inbounds i8, i8* %foo, i64 %j
%cast1 = bitcast i32* %gep1 to i8*
%cmp = icmp ult i8* %cast1, %gep2
ret i1 %cmp
}
define i1 @test60_as1(i8 addrspace(1)* %foo, i64 %i, i64 %j) {
; CHECK-LABEL: @test60_as1(
; CHECK-NEXT: [[TMP1:%.*]] = trunc i64 %i to i16
; CHECK-NEXT: [[TMP2:%.*]] = trunc i64 %j to i16
; CHECK-NEXT: [[GEP1_IDX:%.*]] = shl nuw i16 [[TMP1]], 2
; CHECK-NEXT: [[TMP3:%.*]] = icmp slt i16 [[GEP1_IDX]], [[TMP2]]
; CHECK-NEXT: ret i1 [[TMP3]]
;
%bit = bitcast i8 addrspace(1)* %foo to i32 addrspace(1)*
%gep1 = getelementptr inbounds i32, i32 addrspace(1)* %bit, i64 %i
%gep2 = getelementptr inbounds i8, i8 addrspace(1)* %foo, i64 %j
%cast1 = bitcast i32 addrspace(1)* %gep1 to i8 addrspace(1)*
%cmp = icmp ult i8 addrspace(1)* %cast1, %gep2
ret i1 %cmp
}
; Same as test60, but look through an addrspacecast instead of a
; bitcast. This uses the same sized addrspace.
define i1 @test60_addrspacecast(i8* %foo, i64 %i, i64 %j) {
; CHECK-LABEL: @test60_addrspacecast(
; CHECK-NEXT: [[GEP1_IDX:%.*]] = shl nuw i64 %i, 2
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i64 [[GEP1_IDX]], %j
; CHECK-NEXT: ret i1 [[TMP1]]
;
%bit = addrspacecast i8* %foo to i32 addrspace(3)*
%gep1 = getelementptr inbounds i32, i32 addrspace(3)* %bit, i64 %i
%gep2 = getelementptr inbounds i8, i8* %foo, i64 %j
%cast1 = addrspacecast i32 addrspace(3)* %gep1 to i8*
%cmp = icmp ult i8* %cast1, %gep2
ret i1 %cmp
}
define i1 @test60_addrspacecast_smaller(i8* %foo, i16 %i, i64 %j) {
; CHECK-LABEL: @test60_addrspacecast_smaller(
; CHECK-NEXT: [[GEP1_IDX:%.*]] = shl nuw i16 %i, 2
; CHECK-NEXT: [[TMP1:%.*]] = trunc i64 %j to i16
; CHECK-NEXT: [[TMP2:%.*]] = icmp slt i16 [[GEP1_IDX]], [[TMP1]]
; CHECK-NEXT: ret i1 [[TMP2]]
;
%bit = addrspacecast i8* %foo to i32 addrspace(1)*
%gep1 = getelementptr inbounds i32, i32 addrspace(1)* %bit, i16 %i
%gep2 = getelementptr inbounds i8, i8* %foo, i64 %j
%cast1 = addrspacecast i32 addrspace(1)* %gep1 to i8*
%cmp = icmp ult i8* %cast1, %gep2
ret i1 %cmp
}
define i1 @test60_addrspacecast_larger(i8 addrspace(1)* %foo, i32 %i, i16 %j) {
; CHECK-LABEL: @test60_addrspacecast_larger(
; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 %i to i16
; CHECK-NEXT: [[SHL:%.*]] = shl i16 [[TMP1]], 2
; CHECK-NEXT: [[TMP2:%.*]] = icmp slt i16 [[SHL]], %j
; CHECK-NEXT: ret i1 [[TMP2]]
;
%bit = addrspacecast i8 addrspace(1)* %foo to i32 addrspace(2)*
%gep1 = getelementptr inbounds i32, i32 addrspace(2)* %bit, i32 %i
%gep2 = getelementptr inbounds i8, i8 addrspace(1)* %foo, i16 %j
%cast1 = addrspacecast i32 addrspace(2)* %gep1 to i8 addrspace(1)*
%cmp = icmp ult i8 addrspace(1)* %cast1, %gep2
ret i1 %cmp
}
define i1 @test61(i8* %foo, i64 %i, i64 %j) {
; CHECK-LABEL: @test61(
; CHECK-NEXT: [[BIT:%.*]] = bitcast i8* %foo to i32*
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr i32, i32* [[BIT]], i64 %i
; CHECK-NEXT: [[GEP2:%.*]] = getelementptr i8, i8* %foo, i64 %j
; CHECK-NEXT: [[CAST1:%.*]] = bitcast i32* [[GEP1]] to i8*
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i8* [[GEP2]], [[CAST1]]
; CHECK-NEXT: ret i1 [[CMP]]
;
%bit = bitcast i8* %foo to i32*
%gep1 = getelementptr i32, i32* %bit, i64 %i
%gep2 = getelementptr i8, i8* %foo, i64 %j
%cast1 = bitcast i32* %gep1 to i8*
%cmp = icmp ult i8* %cast1, %gep2
ret i1 %cmp
; Don't transform non-inbounds GEPs.
}
define i1 @test61_as1(i8 addrspace(1)* %foo, i16 %i, i16 %j) {
; CHECK-LABEL: @test61_as1(
; CHECK-NEXT: [[BIT:%.*]] = bitcast i8 addrspace(1)* %foo to i32 addrspace(1)*
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr i32, i32 addrspace(1)* [[BIT]], i16 %i
; CHECK-NEXT: [[GEP2:%.*]] = getelementptr i8, i8 addrspace(1)* %foo, i16 %j
; CHECK-NEXT: [[CAST1:%.*]] = bitcast i32 addrspace(1)* [[GEP1]] to i8 addrspace(1)*
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i8 addrspace(1)* [[GEP2]], [[CAST1]]
; CHECK-NEXT: ret i1 [[CMP]]
;
%bit = bitcast i8 addrspace(1)* %foo to i32 addrspace(1)*
%gep1 = getelementptr i32, i32 addrspace(1)* %bit, i16 %i
%gep2 = getelementptr i8, i8 addrspace(1)* %foo, i16 %j
%cast1 = bitcast i32 addrspace(1)* %gep1 to i8 addrspace(1)*
%cmp = icmp ult i8 addrspace(1)* %cast1, %gep2
ret i1 %cmp
; Don't transform non-inbounds GEPs.
}
define i1 @test62(i8* %a) {
; CHECK-LABEL: @test62(
; CHECK-NEXT: ret i1 true
;
%arrayidx1 = getelementptr inbounds i8, i8* %a, i64 1
%arrayidx2 = getelementptr inbounds i8, i8* %a, i64 10
%cmp = icmp slt i8* %arrayidx1, %arrayidx2
ret i1 %cmp
}
define i1 @test62_as1(i8 addrspace(1)* %a) {
; CHECK-LABEL: @test62_as1(
; CHECK-NEXT: ret i1 true
;
%arrayidx1 = getelementptr inbounds i8, i8 addrspace(1)* %a, i64 1
%arrayidx2 = getelementptr inbounds i8, i8 addrspace(1)* %a, i64 10
%cmp = icmp slt i8 addrspace(1)* %arrayidx1, %arrayidx2
ret i1 %cmp
}
define i1 @test63(i8 %a, i32 %b) {
; CHECK-LABEL: @test63(
; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 %b to i8
; CHECK-NEXT: [[C:%.*]] = icmp eq i8 [[TMP1]], %a
; CHECK-NEXT: ret i1 [[C]]
;
%z = zext i8 %a to i32
%t = and i32 %b, 255
%c = icmp eq i32 %z, %t
ret i1 %c
}
define i1 @test64(i8 %a, i32 %b) {
; CHECK-LABEL: @test64(
; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 %b to i8
; CHECK-NEXT: [[C:%.*]] = icmp eq i8 [[TMP1]], %a
; CHECK-NEXT: ret i1 [[C]]
;
%t = and i32 %b, 255
%z = zext i8 %a to i32
%c = icmp eq i32 %t, %z
ret i1 %c
}
define i1 @test65(i64 %A, i64 %B) {
; CHECK-LABEL: @test65(
; CHECK-NEXT: ret i1 true
;
%s1 = add i64 %A, %B
%s2 = add i64 %A, %B
%cmp = icmp eq i64 %s1, %s2
ret i1 %cmp
}
define i1 @test66(i64 %A, i64 %B) {
; CHECK-LABEL: @test66(
; CHECK-NEXT: ret i1 true
;
%s1 = add i64 %A, %B
%s2 = add i64 %B, %A
%cmp = icmp eq i64 %s1, %s2
ret i1 %cmp
}
define i1 @test67(i32 %x) {
; CHECK-LABEL: @test67(
; CHECK-NEXT: [[AND:%.*]] = and i32 %x, 96
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[AND]], 0
; CHECK-NEXT: ret i1 [[CMP]]
;
%and = and i32 %x, 127
%cmp = icmp sgt i32 %and, 31
ret i1 %cmp
}
define i1 @test67inverse(i32 %x) {
; CHECK-LABEL: @test67inverse(
; CHECK-NEXT: [[AND:%.*]] = and i32 [[X:%.*]], 96
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[AND]], 0
; CHECK-NEXT: ret i1 [[CMP]]
;
%and = and i32 %x, 127
%cmp = icmp sle i32 %and, 31
ret i1 %cmp
}
; The test above relies on 3 different folds.
; This test only checks the last of those (icmp ugt -> icmp ne).
define <2 x i1> @test67vec(<2 x i32> %x) {
; CHECK-LABEL: @test67vec(
; CHECK-NEXT: [[AND:%.*]] = and <2 x i32> %x, <i32 96, i32 96>
; CHECK-NEXT: [[CMP:%.*]] = icmp ne <2 x i32> [[AND]], zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%and = and <2 x i32> %x, <i32 96, i32 96>
%cmp = icmp ugt <2 x i32> %and, <i32 31, i32 31>
ret <2 x i1> %cmp
}
define <2 x i1> @test67vec2(<2 x i32> %x) {
; CHECK-LABEL: @test67vec2(
; CHECK-NEXT: [[AND:%.*]] = and <2 x i32> [[X:%.*]], <i32 96, i32 96>
; CHECK-NEXT: [[CMP:%.*]] = icmp ne <2 x i32> [[AND]], zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%and = and <2 x i32> %x, <i32 127, i32 127>
%cmp = icmp ugt <2 x i32> %and, <i32 31, i32 31>
ret <2 x i1> %cmp
}
define <2 x i1> @test67vecinverse(<2 x i32> %x) {
; CHECK-LABEL: @test67vecinverse(
; CHECK-NEXT: [[AND:%.*]] = and <2 x i32> [[X:%.*]], <i32 96, i32 96>
; CHECK-NEXT: [[CMP:%.*]] = icmp eq <2 x i32> [[AND]], zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%and = and <2 x i32> %x, <i32 96, i32 96>
%cmp = icmp sle <2 x i32> %and, <i32 31, i32 31>
ret <2 x i1> %cmp
}
define i1 @test68(i32 %x) {
; CHECK-LABEL: @test68(
; CHECK-NEXT: [[AND:%.*]] = and i32 %x, 127
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[AND]], 30
; CHECK-NEXT: ret i1 [[CMP]]
;
%and = and i32 %x, 127
%cmp = icmp sgt i32 %and, 30
ret i1 %cmp
}
; PR15940
define i1 @test70(i32 %X) {
; CHECK-LABEL: @test70(
; CHECK-NEXT: [[A:%.*]] = srem i32 5, %X
; CHECK-NEXT: [[C:%.*]] = icmp ne i32 [[A]], 2
; CHECK-NEXT: ret i1 [[C]]
;
%A = srem i32 5, %X
%B = add i32 %A, 2
%C = icmp ne i32 %B, 4
ret i1 %C
}
define <2 x i1> @test70vec(<2 x i32> %X) {
; CHECK-LABEL: @test70vec(
; CHECK-NEXT: [[C:%.*]] = icmp ne <2 x i32> %X, <i32 2, i32 2>
; CHECK-NEXT: ret <2 x i1> [[C]]
;
%B = add <2 x i32> %X, <i32 2, i32 2>
%C = icmp ne <2 x i32> %B, <i32 4, i32 4>
ret <2 x i1> %C
}
define i1 @icmp_sext16trunc(i32 %x) {
; CHECK-LABEL: @icmp_sext16trunc(
; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 %x to i16
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i16 [[TMP1]], 36
; CHECK-NEXT: ret i1 [[CMP]]
;
%trunc = trunc i32 %x to i16
%sext = sext i16 %trunc to i32
%cmp = icmp slt i32 %sext, 36
ret i1 %cmp
}
define i1 @icmp_sext8trunc(i32 %x) {
; CHECK-LABEL: @icmp_sext8trunc(
; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 %x to i8
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[TMP1]], 36
; CHECK-NEXT: ret i1 [[CMP]]
;
%trunc = trunc i32 %x to i8
%sext = sext i8 %trunc to i32
%cmp = icmp slt i32 %sext, 36
ret i1 %cmp
}
; Vectors should fold the same way.
define <2 x i1> @icmp_sext8trunc_vec(<2 x i32> %x) {
; CHECK-LABEL: @icmp_sext8trunc_vec(
; CHECK-NEXT: [[TMP1:%.*]] = trunc <2 x i32> %x to <2 x i8>
; CHECK-NEXT: [[CMP:%.*]] = icmp slt <2 x i8> [[TMP1]], <i8 36, i8 36>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%trunc = trunc <2 x i32> %x to <2 x i8>
%sext = sext <2 x i8> %trunc to <2 x i32>
%cmp = icmp slt <2 x i32> %sext, <i32 36, i32 36>
ret <2 x i1> %cmp
}
define i1 @icmp_shl16(i32 %x) {
; CHECK-LABEL: @icmp_shl16(
; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 %x to i16
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i16 [[TMP1]], 36
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 %x, 16
%cmp = icmp slt i32 %shl, 2359296
ret i1 %cmp
}
; D25952: Don't create illegal types like i15 in InstCombine
define i1 @icmp_shl17(i32 %x) {
; CHECK-LABEL: @icmp_shl17(
; CHECK-NEXT: [[SHL:%.*]] = shl i32 %x, 17
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[SHL]], 2359296
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 %x, 17
%cmp = icmp slt i32 %shl, 2359296
ret i1 %cmp
}
define <2 x i1> @icmp_shl16_vec(<2 x i32> %x) {
; CHECK-LABEL: @icmp_shl16_vec(
; CHECK-NEXT: [[TMP1:%.*]] = trunc <2 x i32> %x to <2 x i16>
; CHECK-NEXT: [[CMP:%.*]] = icmp slt <2 x i16> [[TMP1]], <i16 36, i16 36>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%shl = shl <2 x i32> %x, <i32 16, i32 16>
%cmp = icmp slt <2 x i32> %shl, <i32 2359296, i32 2359296>
ret <2 x i1> %cmp
}
define i1 @icmp_shl24(i32 %x) {
; CHECK-LABEL: @icmp_shl24(
; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 %x to i8
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[TMP1]], 36
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 %x, 24
%cmp = icmp slt i32 %shl, 603979776
ret i1 %cmp
}
define i1 @icmp_shl_eq(i32 %x) {
; CHECK-LABEL: @icmp_shl_eq(
; CHECK-NEXT: [[MUL_MASK:%.*]] = and i32 %x, 134217727
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[MUL_MASK]], 0
; CHECK-NEXT: ret i1 [[CMP]]
;
%mul = shl i32 %x, 5
%cmp = icmp eq i32 %mul, 0
ret i1 %cmp
}
define <2 x i1> @icmp_shl_eq_vec(<2 x i32> %x) {
; CHECK-LABEL: @icmp_shl_eq_vec(
; CHECK-NEXT: [[MUL_MASK:%.*]] = and <2 x i32> %x, <i32 134217727, i32 134217727>
; CHECK-NEXT: [[CMP:%.*]] = icmp eq <2 x i32> [[MUL_MASK]], zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%mul = shl <2 x i32> %x, <i32 5, i32 5>
%cmp = icmp eq <2 x i32> %mul, zeroinitializer
ret <2 x i1> %cmp
}
define i1 @icmp_shl_nsw_ne(i32 %x) {
; CHECK-LABEL: @icmp_shl_nsw_ne(
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 %x, 0
; CHECK-NEXT: ret i1 [[CMP]]
;
%mul = shl nsw i32 %x, 7
%cmp = icmp ne i32 %mul, 0
ret i1 %cmp
}
define <2 x i1> @icmp_shl_nsw_ne_vec(<2 x i32> %x) {
; CHECK-LABEL: @icmp_shl_nsw_ne_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp ne <2 x i32> %x, zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%mul = shl nsw <2 x i32> %x, <i32 7, i32 7>
%cmp = icmp ne <2 x i32> %mul, zeroinitializer
ret <2 x i1> %cmp
}
define i1 @icmp_shl_ne(i32 %x) {
; CHECK-LABEL: @icmp_shl_ne(
; CHECK-NEXT: [[MUL_MASK:%.*]] = and i32 %x, 33554431
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[MUL_MASK]], 0
; CHECK-NEXT: ret i1 [[CMP]]
;
%mul = shl i32 %x, 7
%cmp = icmp ne i32 %mul, 0
ret i1 %cmp
}
define <2 x i1> @icmp_shl_ne_vec(<2 x i32> %x) {
; CHECK-LABEL: @icmp_shl_ne_vec(
; CHECK-NEXT: [[MUL_MASK:%.*]] = and <2 x i32> %x, <i32 33554431, i32 33554431>
; CHECK-NEXT: [[CMP:%.*]] = icmp ne <2 x i32> [[MUL_MASK]], zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%mul = shl <2 x i32> %x, <i32 7, i32 7>
%cmp = icmp ne <2 x i32> %mul, zeroinitializer
ret <2 x i1> %cmp
}
define <2 x i1> @icmp_shl_nuw_ne_vec(<2 x i32> %x) {
; CHECK-LABEL: @icmp_shl_nuw_ne_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp ne <2 x i32> %x, <i32 2, i32 2>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%shl = shl nuw <2 x i32> %x, <i32 7, i32 7>
%cmp = icmp ne <2 x i32> %shl, <i32 256, i32 256>
ret <2 x i1> %cmp
}
; If the (mul x, C) preserved the sign and this is sign test,
; compare the LHS operand instead
define i1 @icmp_mul_nsw(i32 %x) {
; CHECK-LABEL: @icmp_mul_nsw(
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 %x, 0
; CHECK-NEXT: ret i1 [[CMP]]
;
%mul = mul nsw i32 %x, 12
%cmp = icmp sgt i32 %mul, 0
ret i1 %cmp
}
define i1 @icmp_mul_nsw1(i32 %x) {
; CHECK-LABEL: @icmp_mul_nsw1(
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 %x, 0
; CHECK-NEXT: ret i1 [[CMP]]
;
%mul = mul nsw i32 %x, 12
%cmp = icmp sle i32 %mul, -1
ret i1 %cmp
}
define i1 @icmp_mul_nsw_neg(i32 %x) {
; CHECK-LABEL: @icmp_mul_nsw_neg(
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 %x, 1
; CHECK-NEXT: ret i1 [[CMP]]
;
%mul = mul nsw i32 %x, -12
%cmp = icmp sge i32 %mul, 0
ret i1 %cmp
}
define i1 @icmp_mul_nsw_neg1(i32 %x) {
; CHECK-LABEL: @icmp_mul_nsw_neg1(
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 %x, 0
; CHECK-NEXT: ret i1 [[CMP]]
;
%mul = mul nsw i32 %x, -12
%cmp = icmp sge i32 %mul, 1
ret i1 %cmp
}
define <2 x i1> @icmp_mul_nsw_neg1_vec(<2 x i32> %x) {
; CHECK-LABEL: @icmp_mul_nsw_neg1_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp slt <2 x i32> %x, zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%mul = mul nsw <2 x i32> %x, <i32 -12, i32 -12>
%cmp = icmp sge <2 x i32> %mul, <i32 1, i32 1>
ret <2 x i1> %cmp
}
define i1 @icmp_mul_nsw_0(i32 %x) {
; CHECK-LABEL: @icmp_mul_nsw_0(
; CHECK-NEXT: ret i1 false
;
%mul = mul nsw i32 %x, 0
%cmp = icmp sgt i32 %mul, 0
ret i1 %cmp
}
define i1 @icmp_mul(i32 %x) {
; CHECK-LABEL: @icmp_mul(
; CHECK-NEXT: [[MUL:%.*]] = mul i32 %x, -12
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[MUL]], -1
; CHECK-NEXT: ret i1 [[CMP]]
;
%mul = mul i32 %x, -12
%cmp = icmp sge i32 %mul, 0
ret i1 %cmp
}
; Checks for icmp (eq|ne) (mul x, C), 0
define i1 @icmp_mul_neq0(i32 %x) {
; CHECK-LABEL: @icmp_mul_neq0(
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 %x, 0
; CHECK-NEXT: ret i1 [[CMP]]
;
%mul = mul nsw i32 %x, -12
%cmp = icmp ne i32 %mul, 0
ret i1 %cmp
}
define <2 x i1> @icmp_mul_neq0_vec(<2 x i32> %x) {
; CHECK-LABEL: @icmp_mul_neq0_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp ne <2 x i32> %x, zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%mul = mul nsw <2 x i32> %x, <i32 -12, i32 -12>
%cmp = icmp ne <2 x i32> %mul, zeroinitializer
ret <2 x i1> %cmp
}
define i1 @icmp_mul_eq0(i32 %x) {
; CHECK-LABEL: @icmp_mul_eq0(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 %x, 0
; CHECK-NEXT: ret i1 [[CMP]]
;
%mul = mul nsw i32 %x, 12
%cmp = icmp eq i32 %mul, 0
ret i1 %cmp
}
define i1 @icmp_mul0_eq0(i32 %x) {
; CHECK-LABEL: @icmp_mul0_eq0(
; CHECK-NEXT: ret i1 true
;
%mul = mul i32 %x, 0
%cmp = icmp eq i32 %mul, 0
ret i1 %cmp
}
define i1 @icmp_mul0_ne0(i32 %x) {
; CHECK-LABEL: @icmp_mul0_ne0(
; CHECK-NEXT: ret i1 false
;
%mul = mul i32 %x, 0
%cmp = icmp ne i32 %mul, 0
ret i1 %cmp
}
define i1 @icmp_sub1_sge(i32 %x, i32 %y) {
; CHECK-LABEL: @icmp_sub1_sge(
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 %x, %y
; CHECK-NEXT: ret i1 [[CMP]]
;
%sub = add nsw i32 %x, -1
%cmp = icmp sge i32 %sub, %y
ret i1 %cmp
}
define i1 @icmp_add1_sgt(i32 %x, i32 %y) {
; CHECK-LABEL: @icmp_add1_sgt(
; CHECK-NEXT: [[CMP:%.*]] = icmp sge i32 %x, %y
; CHECK-NEXT: ret i1 [[CMP]]
;
%add = add nsw i32 %x, 1
%cmp = icmp sgt i32 %add, %y
ret i1 %cmp
}
define i1 @icmp_sub1_slt(i32 %x, i32 %y) {
; CHECK-LABEL: @icmp_sub1_slt(
; CHECK-NEXT: [[CMP:%.*]] = icmp sle i32 %x, %y
; CHECK-NEXT: ret i1 [[CMP]]
;
%sub = add nsw i32 %x, -1
%cmp = icmp slt i32 %sub, %y
ret i1 %cmp
}
define i1 @icmp_add1_sle(i32 %x, i32 %y) {
; CHECK-LABEL: @icmp_add1_sle(
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 %x, %y
; CHECK-NEXT: ret i1 [[CMP]]
;
%add = add nsw i32 %x, 1
%cmp = icmp sle i32 %add, %y
ret i1 %cmp
}
define i1 @icmp_add20_sge_add57(i32 %x, i32 %y) {
; CHECK-LABEL: @icmp_add20_sge_add57(
; CHECK-NEXT: [[TMP1:%.*]] = add nsw i32 %y, 37
; CHECK-NEXT: [[CMP:%.*]] = icmp sle i32 [[TMP1]], %x
; CHECK-NEXT: ret i1 [[CMP]]
;
%1 = add nsw i32 %x, 20
%2 = add nsw i32 %y, 57
%cmp = icmp sge i32 %1, %2
ret i1 %cmp
}
define i1 @icmp_sub57_sge_sub20(i32 %x, i32 %y) {
; CHECK-LABEL: @icmp_sub57_sge_sub20(
; CHECK-NEXT: [[TMP1:%.*]] = add nsw i32 %x, -37
; CHECK-NEXT: [[CMP:%.*]] = icmp sge i32 [[TMP1]], %y
; CHECK-NEXT: ret i1 [[CMP]]
;
%1 = add nsw i32 %x, -57
%2 = add nsw i32 %y, -20
%cmp = icmp sge i32 %1, %2
ret i1 %cmp
}
define i1 @icmp_and_shl_neg_ne_0(i32 %A, i32 %B) {
; CHECK-LABEL: @icmp_and_shl_neg_ne_0(
; CHECK-NEXT: [[SHL:%.*]] = shl i32 1, %B
; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[SHL]], %A
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP1]], 0
; CHECK-NEXT: ret i1 [[CMP]]
;
%neg = xor i32 %A, -1
%shl = shl i32 1, %B
%and = and i32 %shl, %neg
%cmp = icmp ne i32 %and, 0
ret i1 %cmp
}
define i1 @icmp_and_shl_neg_eq_0(i32 %A, i32 %B) {
; CHECK-LABEL: @icmp_and_shl_neg_eq_0(
; CHECK-NEXT: [[SHL:%.*]] = shl i32 1, %B
; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[SHL]], %A
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[TMP1]], 0
; CHECK-NEXT: ret i1 [[CMP]]
;
%neg = xor i32 %A, -1
%shl = shl i32 1, %B
%and = and i32 %shl, %neg
%cmp = icmp eq i32 %and, 0
ret i1 %cmp
}
define i1 @icmp_add_and_shr_ne_0(i32 %X) {
; CHECK-LABEL: @icmp_add_and_shr_ne_0(
; CHECK-NEXT: [[AND:%.*]] = and i32 %X, 240
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp ne i32 [[AND]], 224
; CHECK-NEXT: ret i1 [[TOBOOL]]
;
%shr = lshr i32 %X, 4
%and = and i32 %shr, 15
%add = add i32 %and, -14
%tobool = icmp ne i32 %add, 0
ret i1 %tobool
}
define <2 x i1> @icmp_add_and_shr_ne_0_vec(<2 x i32> %X) {
; CHECK-LABEL: @icmp_add_and_shr_ne_0_vec(
; CHECK-NEXT: [[AND:%.*]] = and <2 x i32> %X, <i32 240, i32 240>
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp ne <2 x i32> [[AND]], <i32 224, i32 224>
; CHECK-NEXT: ret <2 x i1> [[TOBOOL]]
;
%shr = lshr <2 x i32> %X, <i32 4, i32 4>
%and = and <2 x i32> %shr, <i32 15, i32 15>
%add = add <2 x i32> %and, <i32 -14, i32 -14>
%tobool = icmp ne <2 x i32> %add, zeroinitializer
ret <2 x i1> %tobool
}
; Variation of the above with an extra use of the shift
define i1 @icmp_and_shr_multiuse(i32 %X) {
; CHECK-LABEL: @icmp_and_shr_multiuse(
; CHECK-NEXT: [[AND:%.*]] = and i32 [[X:%.*]], 240
; CHECK-NEXT: [[AND2:%.*]] = and i32 [[X]], 496
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp ne i32 [[AND]], 224
; CHECK-NEXT: [[TOBOOL2:%.*]] = icmp ne i32 [[AND2]], 432
; CHECK-NEXT: [[AND3:%.*]] = and i1 [[TOBOOL]], [[TOBOOL2]]
; CHECK-NEXT: ret i1 [[AND3]]
;
%shr = lshr i32 %X, 4
%and = and i32 %shr, 15
%and2 = and i32 %shr, 31 ; second use of the shift
%tobool = icmp ne i32 %and, 14
%tobool2 = icmp ne i32 %and2, 27
%and3 = and i1 %tobool, %tobool2
ret i1 %and3
}
; Variation of the above with an ashr
define i1 @icmp_and_ashr_multiuse(i32 %X) {
; CHECK-LABEL: @icmp_and_ashr_multiuse(
; CHECK-NEXT: [[AND:%.*]] = and i32 [[X:%.*]], 240
; CHECK-NEXT: [[AND2:%.*]] = and i32 [[X]], 496
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp ne i32 [[AND]], 224
; CHECK-NEXT: [[TOBOOL2:%.*]] = icmp ne i32 [[AND2]], 432
; CHECK-NEXT: [[AND3:%.*]] = and i1 [[TOBOOL]], [[TOBOOL2]]
; CHECK-NEXT: ret i1 [[AND3]]
;
%shr = ashr i32 %X, 4
%and = and i32 %shr, 15
%and2 = and i32 %shr, 31 ; second use of the shift
%tobool = icmp ne i32 %and, 14
%tobool2 = icmp ne i32 %and2, 27
%and3 = and i1 %tobool, %tobool2
ret i1 %and3
}
define i1 @icmp_lshr_and_overshift(i8 %X) {
; CHECK-LABEL: @icmp_lshr_and_overshift(
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp ugt i8 [[X:%.*]], 31
; CHECK-NEXT: ret i1 [[TOBOOL]]
;
%shr = lshr i8 %X, 5
%and = and i8 %shr, 15
%tobool = icmp ne i8 %and, 0
ret i1 %tobool
}
; We shouldn't simplify this because the and uses bits that are shifted in.
define i1 @icmp_ashr_and_overshift(i8 %X) {
; CHECK-LABEL: @icmp_ashr_and_overshift(
; CHECK-NEXT: [[SHR:%.*]] = ashr i8 [[X:%.*]], 5
; CHECK-NEXT: [[AND:%.*]] = and i8 [[SHR]], 15
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp ne i8 [[AND]], 0
; CHECK-NEXT: ret i1 [[TOBOOL]]
;
%shr = ashr i8 %X, 5
%and = and i8 %shr, 15
%tobool = icmp ne i8 %and, 0
ret i1 %tobool
}
; PR16244
define i1 @test71(i8* %x) {
; CHECK-LABEL: @test71(
; CHECK-NEXT: ret i1 false
;
%a = getelementptr i8, i8* %x, i64 8
%b = getelementptr inbounds i8, i8* %x, i64 8
%c = icmp ugt i8* %a, %b
ret i1 %c
}
define i1 @test71_as1(i8 addrspace(1)* %x) {
; CHECK-LABEL: @test71_as1(
; CHECK-NEXT: ret i1 false
;
%a = getelementptr i8, i8 addrspace(1)* %x, i64 8
%b = getelementptr inbounds i8, i8 addrspace(1)* %x, i64 8
%c = icmp ugt i8 addrspace(1)* %a, %b
ret i1 %c
}
define i1 @icmp_shl_1_V_ult_32(i32 %V) {
; CHECK-LABEL: @icmp_shl_1_V_ult_32(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 %V, 5
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 1, %V
%cmp = icmp ult i32 %shl, 32
ret i1 %cmp
}
define <2 x i1> @icmp_shl_1_V_ult_32_vec(<2 x i32> %V) {
; CHECK-LABEL: @icmp_shl_1_V_ult_32_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult <2 x i32> %V, <i32 5, i32 5>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%shl = shl <2 x i32> <i32 1, i32 1>, %V
%cmp = icmp ult <2 x i32> %shl, <i32 32, i32 32>
ret <2 x i1> %cmp
}
define i1 @icmp_shl_1_V_eq_32(i32 %V) {
; CHECK-LABEL: @icmp_shl_1_V_eq_32(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 %V, 5
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 1, %V
%cmp = icmp eq i32 %shl, 32
ret i1 %cmp
}
define <2 x i1> @icmp_shl_1_V_eq_32_vec(<2 x i32> %V) {
; CHECK-LABEL: @icmp_shl_1_V_eq_32_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq <2 x i32> %V, <i32 5, i32 5>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%shl = shl <2 x i32> <i32 1, i32 1>, %V
%cmp = icmp eq <2 x i32> %shl, <i32 32, i32 32>
ret <2 x i1> %cmp
}
define i1 @icmp_shl_1_V_ult_30(i32 %V) {
; CHECK-LABEL: @icmp_shl_1_V_ult_30(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 %V, 5
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 1, %V
%cmp = icmp ult i32 %shl, 30
ret i1 %cmp
}
define <2 x i1> @icmp_shl_1_V_ult_30_vec(<2 x i32> %V) {
; CHECK-LABEL: @icmp_shl_1_V_ult_30_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult <2 x i32> %V, <i32 5, i32 5>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%shl = shl <2 x i32> <i32 1, i32 1>, %V
%cmp = icmp ult <2 x i32> %shl, <i32 30, i32 30>
ret <2 x i1> %cmp
}
define i1 @icmp_shl_1_V_ugt_30(i32 %V) {
; CHECK-LABEL: @icmp_shl_1_V_ugt_30(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 %V, 4
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 1, %V
%cmp = icmp ugt i32 %shl, 30
ret i1 %cmp
}
define <2 x i1> @icmp_shl_1_V_ugt_30_vec(<2 x i32> %V) {
; CHECK-LABEL: @icmp_shl_1_V_ugt_30_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt <2 x i32> %V, <i32 4, i32 4>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%shl = shl <2 x i32> <i32 1, i32 1>, %V
%cmp = icmp ugt <2 x i32> %shl, <i32 30, i32 30>
ret <2 x i1> %cmp
}
define i1 @icmp_shl_1_V_ule_30(i32 %V) {
; CHECK-LABEL: @icmp_shl_1_V_ule_30(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 %V, 5
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 1, %V
%cmp = icmp ule i32 %shl, 30
ret i1 %cmp
}
define <2 x i1> @icmp_shl_1_V_ule_30_vec(<2 x i32> %V) {
; CHECK-LABEL: @icmp_shl_1_V_ule_30_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult <2 x i32> %V, <i32 5, i32 5>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%shl = shl <2 x i32> <i32 1, i32 1>, %V
%cmp = icmp ule <2 x i32> %shl, <i32 30, i32 30>
ret <2 x i1> %cmp
}
define i1 @icmp_shl_1_V_uge_30(i32 %V) {
; CHECK-LABEL: @icmp_shl_1_V_uge_30(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 %V, 4
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 1, %V
%cmp = icmp uge i32 %shl, 30
ret i1 %cmp
}
define <2 x i1> @icmp_shl_1_V_uge_30_vec(<2 x i32> %V) {
; CHECK-LABEL: @icmp_shl_1_V_uge_30_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt <2 x i32> %V, <i32 4, i32 4>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%shl = shl <2 x i32> <i32 1, i32 1>, %V
%cmp = icmp uge <2 x i32> %shl, <i32 30, i32 30>
ret <2 x i1> %cmp
}
define i1 @icmp_shl_1_V_uge_2147483648(i32 %V) {
; CHECK-LABEL: @icmp_shl_1_V_uge_2147483648(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 %V, 31
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 1, %V
%cmp = icmp uge i32 %shl, 2147483648
ret i1 %cmp
}
define <2 x i1> @icmp_shl_1_V_uge_2147483648_vec(<2 x i32> %V) {
; CHECK-LABEL: @icmp_shl_1_V_uge_2147483648_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq <2 x i32> %V, <i32 31, i32 31>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%shl = shl <2 x i32> <i32 1, i32 1>, %V
%cmp = icmp uge <2 x i32> %shl, <i32 2147483648, i32 2147483648>
ret <2 x i1> %cmp
}
define i1 @icmp_shl_1_V_ult_2147483648(i32 %V) {
; CHECK-LABEL: @icmp_shl_1_V_ult_2147483648(
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 %V, 31
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 1, %V
%cmp = icmp ult i32 %shl, 2147483648
ret i1 %cmp
}
define <2 x i1> @icmp_shl_1_V_ult_2147483648_vec(<2 x i32> %V) {
; CHECK-LABEL: @icmp_shl_1_V_ult_2147483648_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp ne <2 x i32> %V, <i32 31, i32 31>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%shl = shl <2 x i32> <i32 1, i32 1>, %V
%cmp = icmp ult <2 x i32> %shl, <i32 2147483648, i32 2147483648>
ret <2 x i1> %cmp
}
define i1 @or_icmp_eq_B_0_icmp_ult_A_B(i64 %a, i64 %b) {
; CHECK-LABEL: @or_icmp_eq_B_0_icmp_ult_A_B(
; CHECK-NEXT: [[TMP1:%.*]] = add i64 %b, -1
; CHECK-NEXT: [[TMP2:%.*]] = icmp uge i64 [[TMP1]], %a
; CHECK-NEXT: ret i1 [[TMP2]]
;
%1 = icmp eq i64 %b, 0
%2 = icmp ult i64 %a, %b
%3 = or i1 %1, %2
ret i1 %3
}
define i1 @icmp_add_ult_2(i32 %X) {
; CHECK-LABEL: @icmp_add_ult_2(
; CHECK-NEXT: [[TMP1:%.*]] = and i32 %X, -2
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP1]], 14
; CHECK-NEXT: ret i1 [[CMP]]
;
%add = add i32 %X, -14
%cmp = icmp ult i32 %add, 2
ret i1 %cmp
}
define <2 x i1> @icmp_add_X_-14_ult_2_vec(<2 x i32> %X) {
; CHECK-LABEL: @icmp_add_X_-14_ult_2_vec(
; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i32> %X, <i32 -2, i32 -2>
; CHECK-NEXT: [[CMP:%.*]] = icmp eq <2 x i32> [[TMP1]], <i32 14, i32 14>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%add = add <2 x i32> %X, <i32 -14, i32 -14>
%cmp = icmp ult <2 x i32> %add, <i32 2, i32 2>
ret <2 x i1> %cmp
}
define i1 @icmp_sub_3_X_ult_2(i32 %X) {
; CHECK-LABEL: @icmp_sub_3_X_ult_2(
; CHECK-NEXT: [[TMP1:%.*]] = or i32 %X, 1
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP1]], 3
; CHECK-NEXT: ret i1 [[CMP]]
;
%add = sub i32 3, %X
%cmp = icmp ult i32 %add, 2
ret i1 %cmp
}
define <2 x i1> @icmp_sub_3_X_ult_2_vec(<2 x i32> %X) {
; CHECK-LABEL: @icmp_sub_3_X_ult_2_vec(
; CHECK-NEXT: [[TMP1:%.*]] = or <2 x i32> %X, <i32 1, i32 1>
; CHECK-NEXT: [[CMP:%.*]] = icmp eq <2 x i32> [[TMP1]], <i32 3, i32 3>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%add = sub <2 x i32> <i32 3, i32 3>, %X
%cmp = icmp ult <2 x i32> %add, <i32 2, i32 2>
ret <2 x i1> %cmp
}
define i1 @icmp_add_X_-14_uge_2(i32 %X) {
; CHECK-LABEL: @icmp_add_X_-14_uge_2(
; CHECK-NEXT: [[TMP1:%.*]] = and i32 %X, -2
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[TMP1]], 14
; CHECK-NEXT: ret i1 [[CMP]]
;
%add = add i32 %X, -14
%cmp = icmp uge i32 %add, 2
ret i1 %cmp
}
define <2 x i1> @icmp_add_X_-14_uge_2_vec(<2 x i32> %X) {
; CHECK-LABEL: @icmp_add_X_-14_uge_2_vec(
; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i32> %X, <i32 -2, i32 -2>
; CHECK-NEXT: [[CMP:%.*]] = icmp ne <2 x i32> [[TMP1]], <i32 14, i32 14>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%add = add <2 x i32> %X, <i32 -14, i32 -14>
%cmp = icmp uge <2 x i32> %add, <i32 2, i32 2>
ret <2 x i1> %cmp
}
define i1 @icmp_sub_3_X_uge_2(i32 %X) {
; CHECK-LABEL: @icmp_sub_3_X_uge_2(
; CHECK-NEXT: [[TMP1:%.*]] = or i32 %X, 1
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[TMP1]], 3
; CHECK-NEXT: ret i1 [[CMP]]
;
%add = sub i32 3, %X
%cmp = icmp uge i32 %add, 2
ret i1 %cmp
}
define <2 x i1> @icmp_sub_3_X_uge_2_vec(<2 x i32> %X) {
; CHECK-LABEL: @icmp_sub_3_X_uge_2_vec(
; CHECK-NEXT: [[TMP1:%.*]] = or <2 x i32> %X, <i32 1, i32 1>
; CHECK-NEXT: [[CMP:%.*]] = icmp ne <2 x i32> [[TMP1]], <i32 3, i32 3>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%add = sub <2 x i32> <i32 3, i32 3>, %X
%cmp = icmp uge <2 x i32> %add, <i32 2, i32 2>
ret <2 x i1> %cmp
}
define i1 @icmp_and_X_-16_eq-16(i32 %X) {
; CHECK-LABEL: @icmp_and_X_-16_eq-16(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 %X, -17
; CHECK-NEXT: ret i1 [[CMP]]
;
%and = and i32 %X, -16
%cmp = icmp eq i32 %and, -16
ret i1 %cmp
}
define <2 x i1> @icmp_and_X_-16_eq-16_vec(<2 x i32> %X) {
; CHECK-LABEL: @icmp_and_X_-16_eq-16_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt <2 x i32> %X, <i32 -17, i32 -17>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%and = and <2 x i32> %X, <i32 -16, i32 -16>
%cmp = icmp eq <2 x i32> %and, <i32 -16, i32 -16>
ret <2 x i1> %cmp
}
define i1 @icmp_and_X_-16_ne-16(i32 %X) {
; CHECK-LABEL: @icmp_and_X_-16_ne-16(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 %X, -16
; CHECK-NEXT: ret i1 [[CMP]]
;
%and = and i32 %X, -16
%cmp = icmp ne i32 %and, -16
ret i1 %cmp
}
define <2 x i1> @icmp_and_X_-16_ne-16_vec(<2 x i32> %X) {
; CHECK-LABEL: @icmp_and_X_-16_ne-16_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult <2 x i32> %X, <i32 -16, i32 -16>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%and = and <2 x i32> %X, <i32 -16, i32 -16>
%cmp = icmp ne <2 x i32> %and, <i32 -16, i32 -16>
ret <2 x i1> %cmp
}
; PR32524: https://bugs.llvm.org/show_bug.cgi?id=32524
; X | C == C --> X <=u C (when C+1 is PowerOf2).
define i1 @or1_eq1(i32 %x) {
; CHECK-LABEL: @or1_eq1(
; CHECK-NEXT: [[T1:%.*]] = icmp ult i32 %x, 2
; CHECK-NEXT: ret i1 [[T1]]
;
%t0 = or i32 %x, 1
%t1 = icmp eq i32 %t0, 1
ret i1 %t1
}
; X | C == C --> X <=u C (when C+1 is PowerOf2).
define <2 x i1> @or3_eq3_vec(<2 x i8> %x) {
; CHECK-LABEL: @or3_eq3_vec(
; CHECK-NEXT: [[T1:%.*]] = icmp ult <2 x i8> %x, <i8 4, i8 4>
; CHECK-NEXT: ret <2 x i1> [[T1]]
;
%t0 = or <2 x i8> %x, <i8 3, i8 3>
%t1 = icmp eq <2 x i8> %t0, <i8 3, i8 3>
ret <2 x i1> %t1
}
; X | C != C --> X >u C (when C+1 is PowerOf2).
define i1 @or7_ne7(i32 %x) {
; CHECK-LABEL: @or7_ne7(
; CHECK-NEXT: [[T1:%.*]] = icmp ugt i32 %x, 7
; CHECK-NEXT: ret i1 [[T1]]
;
%t0 = or i32 %x, 7
%t1 = icmp ne i32 %t0, 7
ret i1 %t1
}
; X | C != C --> X >u C (when C+1 is PowerOf2).
define <2 x i1> @or63_ne63_vec(<2 x i8> %x) {
; CHECK-LABEL: @or63_ne63_vec(
; CHECK-NEXT: [[T1:%.*]] = icmp ugt <2 x i8> %x, <i8 63, i8 63>
; CHECK-NEXT: ret <2 x i1> [[T1]]
;
%t0 = or <2 x i8> %x, <i8 63, i8 63>
%t1 = icmp ne <2 x i8> %t0, <i8 63, i8 63>
ret <2 x i1> %t1
}
define i1 @shrink_constant(i32 %X) {
; CHECK-LABEL: @shrink_constant(
; CHECK-NEXT: [[XOR:%.*]] = xor i32 %X, -12
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[XOR]], 4
; CHECK-NEXT: ret i1 [[CMP]]
;
%xor = xor i32 %X, -9
%cmp = icmp ult i32 %xor, 4
ret i1 %cmp
}
define <2 x i1> @shrink_constant_vec(<2 x i32> %X) {
; CHECK-LABEL: @shrink_constant_vec(
; CHECK-NEXT: [[XOR:%.*]] = xor <2 x i32> [[X:%.*]], <i32 -12, i32 -12>
; CHECK-NEXT: [[CMP:%.*]] = icmp ult <2 x i32> [[XOR]], <i32 4, i32 4>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%xor = xor <2 x i32> %X, <i32 -9, i32 -9>
%cmp = icmp ult <2 x i32> %xor, <i32 4, i32 4>
ret <2 x i1> %cmp
}
; This test requires 3 different transforms to get to the result.
define i1 @icmp_sub_-1_X_ult_4(i32 %X) {
; CHECK-LABEL: @icmp_sub_-1_X_ult_4(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 %X, -5
; CHECK-NEXT: ret i1 [[CMP]]
;
%sub = sub i32 -1, %X
%cmp = icmp ult i32 %sub, 4
ret i1 %cmp
}
define <2 x i1> @icmp_xor_neg4_X_ult_4_vec(<2 x i32> %X) {
; CHECK-LABEL: @icmp_xor_neg4_X_ult_4_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt <2 x i32> %X, <i32 -5, i32 -5>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%xor = xor <2 x i32> %X, <i32 -4, i32 -4>
%cmp = icmp ult <2 x i32> %xor, <i32 4, i32 4>
ret <2 x i1> %cmp
}
define i1 @icmp_sub_-1_X_uge_4(i32 %X) {
; CHECK-LABEL: @icmp_sub_-1_X_uge_4(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 %X, -4
; CHECK-NEXT: ret i1 [[CMP]]
;
%sub = sub i32 -1, %X
%cmp = icmp uge i32 %sub, 4
ret i1 %cmp
}
define <2 x i1> @icmp_xor_neg4_X_uge_4_vec(<2 x i32> %X) {
; CHECK-LABEL: @icmp_xor_neg4_X_uge_4_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult <2 x i32> %X, <i32 -4, i32 -4>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%xor = xor <2 x i32> %X, <i32 -4, i32 -4>
%cmp = icmp uge <2 x i32> %xor, <i32 4, i32 4>
ret <2 x i1> %cmp
}
define i1 @icmp_swap_operands_for_cse(i32 %X, i32 %Y) {
; CHECK-LABEL: @icmp_swap_operands_for_cse(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[SUB:%.*]] = sub i32 %X, %Y
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 %X, %Y
; CHECK-NEXT: br i1 [[CMP]], label %true, label %false
; CHECK: true:
; CHECK-NEXT: [[TMP0:%.*]] = and i32 [[SUB]], 1
; CHECK-NEXT: br label %end
; CHECK: false:
; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[SUB]], 16
; CHECK-NEXT: br label %end
; CHECK: end:
; CHECK-NEXT: [[RES_IN:%.*]] = phi i32 [ [[TMP0]], %true ], [ [[TMP1]], %false ]
; CHECK-NEXT: [[RES:%.*]] = icmp ne i32 [[RES:%.*]].in, 0
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
%sub = sub i32 %X, %Y
%cmp = icmp ugt i32 %Y, %X
br i1 %cmp, label %true, label %false
true:
%restrue = trunc i32 %sub to i1
br label %end
false:
%shift = lshr i32 %sub, 4
%resfalse = trunc i32 %shift to i1
br label %end
end:
%res = phi i1 [%restrue, %true], [%resfalse, %false]
ret i1 %res
}
define i1 @icmp_swap_operands_for_cse2(i32 %X, i32 %Y) {
; CHECK-LABEL: @icmp_swap_operands_for_cse2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 %X, %Y
; CHECK-NEXT: br i1 [[CMP]], label %true, label %false
; CHECK: true:
; CHECK-NEXT: [[SUB:%.*]] = sub i32 %X, %Y
; CHECK-NEXT: [[SUB1:%.*]] = sub i32 %X, %Y
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[SUB]], [[SUB1]]
; CHECK-NEXT: br label %end
; CHECK: false:
; CHECK-NEXT: [[SUB2:%.*]] = sub i32 %Y, %X
; CHECK-NEXT: br label %end
; CHECK: end:
; CHECK-NEXT: [[RES_IN_IN:%.*]] = phi i32 [ [[ADD]], %true ], [ [[SUB2]], %false ]
; CHECK-NEXT: [[RES_IN:%.*]] = and i32 [[RES_IN:%.*]].in, 1
; CHECK-NEXT: [[RES:%.*]] = icmp ne i32 [[RES:%.*]].in, 0
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
%cmp = icmp ugt i32 %Y, %X
br i1 %cmp, label %true, label %false
true:
%sub = sub i32 %X, %Y
%sub1 = sub i32 %X, %Y
%add = add i32 %sub, %sub1
%restrue = trunc i32 %add to i1
br label %end
false:
%sub2 = sub i32 %Y, %X
%resfalse = trunc i32 %sub2 to i1
br label %end
end:
%res = phi i1 [%restrue, %true], [%resfalse, %false]
ret i1 %res
}
define i1 @icmp_do_not_swap_operands_for_cse(i32 %X, i32 %Y) {
; CHECK-LABEL: @icmp_do_not_swap_operands_for_cse(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 %Y, %X
; CHECK-NEXT: br i1 [[CMP]], label %true, label %false
; CHECK: true:
; CHECK-NEXT: [[SUB:%.*]] = sub i32 %X, %Y
; CHECK-NEXT: br label %end
; CHECK: false:
; CHECK-NEXT: [[SUB2:%.*]] = sub i32 %Y, %X
; CHECK-NEXT: br label %end
; CHECK: end:
; CHECK-NEXT: [[RES_IN_IN:%.*]] = phi i32 [ [[SUB]], %true ], [ [[SUB2]], %false ]
; CHECK-NEXT: [[RES_IN:%.*]] = and i32 [[RES_IN:%.*]].in, 1
; CHECK-NEXT: [[RES:%.*]] = icmp ne i32 [[RES:%.*]].in, 0
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
%cmp = icmp ugt i32 %Y, %X
br i1 %cmp, label %true, label %false
true:
%sub = sub i32 %X, %Y
%restrue = trunc i32 %sub to i1
br label %end
false:
%sub2 = sub i32 %Y, %X
%resfalse = trunc i32 %sub2 to i1
br label %end
end:
%res = phi i1 [%restrue, %true], [%resfalse, %false]
ret i1 %res
}
define i1 @icmp_lshr_lshr_eq(i32 %a, i32 %b) {
; CHECK-LABEL: @icmp_lshr_lshr_eq(
; CHECK-NEXT: [[Z_UNSHIFTED:%.*]] = xor i32 %a, %b
; CHECK-NEXT: [[Z:%.*]] = icmp ult i32 [[Z:%.*]].unshifted, 1073741824
; CHECK-NEXT: ret i1 [[Z]]
;
%x = lshr i32 %a, 30
%y = lshr i32 %b, 30
%z = icmp eq i32 %x, %y
ret i1 %z
}
define i1 @icmp_ashr_ashr_ne(i32 %a, i32 %b) {
; CHECK-LABEL: @icmp_ashr_ashr_ne(
; CHECK-NEXT: [[Z_UNSHIFTED:%.*]] = xor i32 %a, %b
; CHECK-NEXT: [[Z:%.*]] = icmp ugt i32 [[Z:%.*]].unshifted, 255
; CHECK-NEXT: ret i1 [[Z]]
;
%x = ashr i32 %a, 8
%y = ashr i32 %b, 8
%z = icmp ne i32 %x, %y
ret i1 %z
}
define i1 @icmp_neg_cst_slt(i32 %a) {
; CHECK-LABEL: @icmp_neg_cst_slt(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 %a, 10
; CHECK-NEXT: ret i1 [[TMP1]]
;
%1 = sub nsw i32 0, %a
%2 = icmp slt i32 %1, -10
ret i1 %2
}
define i1 @icmp_and_or_lshr(i32 %x, i32 %y) {
; CHECK-LABEL: @icmp_and_or_lshr(
; CHECK-NEXT: [[SHF1:%.*]] = shl nuw i32 1, %y
; CHECK-NEXT: [[OR2:%.*]] = or i32 [[SHF1]], 1
; CHECK-NEXT: [[AND3:%.*]] = and i32 [[OR2]], %x
; CHECK-NEXT: [[RET:%.*]] = icmp ne i32 [[AND3]], 0
; CHECK-NEXT: ret i1 [[RET]]
;
%shf = lshr i32 %x, %y
%or = or i32 %shf, %x
%and = and i32 %or, 1
%ret = icmp ne i32 %and, 0
ret i1 %ret
}
define <2 x i1> @icmp_and_or_lshr_vec(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @icmp_and_or_lshr_vec(
; CHECK-NEXT: [[SHF1:%.*]] = shl nuw <2 x i32> <i32 1, i32 1>, %y
; CHECK-NEXT: [[OR2:%.*]] = or <2 x i32> [[SHF1]], <i32 1, i32 1>
; CHECK-NEXT: [[AND3:%.*]] = and <2 x i32> [[OR2]], %x
; CHECK-NEXT: [[RET:%.*]] = icmp ne <2 x i32> [[AND3]], zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[RET]]
;
%shf = lshr <2 x i32> %x, %y
%or = or <2 x i32> %shf, %x
%and = and <2 x i32> %or, <i32 1, i32 1>
%ret = icmp ne <2 x i32> %and, zeroinitializer
ret <2 x i1> %ret
}
define i1 @icmp_and_or_lshr_cst(i32 %x) {
; CHECK-LABEL: @icmp_and_or_lshr_cst(
; CHECK-NEXT: [[AND1:%.*]] = and i32 %x, 3
; CHECK-NEXT: [[RET:%.*]] = icmp ne i32 [[AND1]], 0
; CHECK-NEXT: ret i1 [[RET]]
;
%shf = lshr i32 %x, 1
%or = or i32 %shf, %x
%and = and i32 %or, 1
%ret = icmp ne i32 %and, 0
ret i1 %ret
}
define <2 x i1> @icmp_and_or_lshr_cst_vec(<2 x i32> %x) {
; CHECK-LABEL: @icmp_and_or_lshr_cst_vec(
; CHECK-NEXT: [[AND1:%.*]] = and <2 x i32> %x, <i32 3, i32 3>
; CHECK-NEXT: [[RET:%.*]] = icmp ne <2 x i32> [[AND1]], zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[RET]]
;
%shf = lshr <2 x i32> %x, <i32 1, i32 1>
%or = or <2 x i32> %shf, %x
%and = and <2 x i32> %or, <i32 1, i32 1>
%ret = icmp ne <2 x i32> %and, zeroinitializer
ret <2 x i1> %ret
}
define i1 @shl_ap1_zero_ap2_non_zero_2(i32 %a) {
; CHECK-LABEL: @shl_ap1_zero_ap2_non_zero_2(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 %a, 29
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 4, %a
%cmp = icmp eq i32 %shl, 0
ret i1 %cmp
}
define <2 x i1> @shl_ap1_zero_ap2_non_zero_2_vec(<2 x i32> %a) {
; CHECK-LABEL: @shl_ap1_zero_ap2_non_zero_2_vec(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt <2 x i32> %a, <i32 29, i32 29>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%shl = shl <2 x i32> <i32 4, i32 4>, %a
%cmp = icmp eq <2 x i32> %shl, zeroinitializer
ret <2 x i1> %cmp
}
define i1 @shl_ap1_zero_ap2_non_zero_4(i32 %a) {
; CHECK-LABEL: @shl_ap1_zero_ap2_non_zero_4(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 %a, 30
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 -2, %a
%cmp = icmp eq i32 %shl, 0
ret i1 %cmp
}
define i1 @shl_ap1_non_zero_ap2_non_zero_both_positive(i32 %a) {
; CHECK-LABEL: @shl_ap1_non_zero_ap2_non_zero_both_positive(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 %a, 0
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 50, %a
%cmp = icmp eq i32 %shl, 50
ret i1 %cmp
}
define i1 @shl_ap1_non_zero_ap2_non_zero_both_negative(i32 %a) {
; CHECK-LABEL: @shl_ap1_non_zero_ap2_non_zero_both_negative(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 %a, 0
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 -50, %a
%cmp = icmp eq i32 %shl, -50
ret i1 %cmp
}
define i1 @shl_ap1_non_zero_ap2_non_zero_ap1_1(i32 %a) {
; CHECK-LABEL: @shl_ap1_non_zero_ap2_non_zero_ap1_1(
; CHECK-NEXT: ret i1 false
;
%shl = shl i32 50, %a
%cmp = icmp eq i32 %shl, 25
ret i1 %cmp
}
define i1 @shl_ap1_non_zero_ap2_non_zero_ap1_2(i32 %a) {
; CHECK-LABEL: @shl_ap1_non_zero_ap2_non_zero_ap1_2(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 %a, 1
; CHECK-NEXT: ret i1 [[CMP]]
;
%shl = shl i32 25, %a
%cmp = icmp eq i32 %shl, 50
ret i1 %cmp
}
define i1 @shl_ap1_non_zero_ap2_non_zero_ap1_3(i32 %a) {
; CHECK-LABEL: @shl_ap1_non_zero_ap2_non_zero_ap1_3(
; CHECK-NEXT: ret i1 false
;
%shl = shl i32 26, %a
%cmp = icmp eq i32 %shl, 50
ret i1 %cmp
}
define i1 @icmp_sgt_zero_add_nsw(i32 %a) {
; CHECK-LABEL: @icmp_sgt_zero_add_nsw(
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 %a, -1
; CHECK-NEXT: ret i1 [[CMP]]
;
%add = add nsw i32 %a, 1
%cmp = icmp sgt i32 %add, 0
ret i1 %cmp
}
define i1 @icmp_sge_zero_add_nsw(i32 %a) {
; CHECK-LABEL: @icmp_sge_zero_add_nsw(
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 %a, -2
; CHECK-NEXT: ret i1 [[CMP]]
;
%add = add nsw i32 %a, 1
%cmp = icmp sge i32 %add, 0
ret i1 %cmp
}
define i1 @icmp_sle_zero_add_nsw(i32 %a) {
; CHECK-LABEL: @icmp_sle_zero_add_nsw(
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 %a, 0
; CHECK-NEXT: ret i1 [[CMP]]
;
%add = add nsw i32 %a, 1
%cmp = icmp sle i32 %add, 0
ret i1 %cmp
}
define zeroext i1 @icmp_cmpxchg_strong(i32* %sc, i32 %old_val, i32 %new_val) {
; CHECK-LABEL: @icmp_cmpxchg_strong(
; CHECK-NEXT: [[XCHG:%.*]] = cmpxchg i32* %sc, i32 %old_val, i32 %new_val seq_cst seq_cst
; CHECK-NEXT: [[ICMP:%.*]] = extractvalue { i32, i1
;
%xchg = cmpxchg i32* %sc, i32 %old_val, i32 %new_val seq_cst seq_cst
%xtrc = extractvalue { i32, i1 } %xchg, 0
%icmp = icmp eq i32 %xtrc, %old_val
ret i1 %icmp
}
define i1 @f1(i64 %a, i64 %b) {
; CHECK-LABEL: @f1(
; CHECK-NEXT: [[V:%.*]] = icmp sge i64 %a, %b
; CHECK-NEXT: ret i1 [[V]]
;
%t = sub nsw i64 %a, %b
%v = icmp sge i64 %t, 0
ret i1 %v
}
define <2 x i1> @f1_vec(<2 x i64> %a, <2 x i64> %b) {
; CHECK-LABEL: @f1_vec(
; CHECK-NEXT: [[V:%.*]] = icmp sge <2 x i64> %a, %b
; CHECK-NEXT: ret <2 x i1> [[V]]
;
%t = sub nsw <2 x i64> %a, %b
%v = icmp sgt <2 x i64> %t, <i64 -1, i64 -1>
ret <2 x i1> %v
}
define i1 @f2(i64 %a, i64 %b) {
; CHECK-LABEL: @f2(
; CHECK-NEXT: [[V:%.*]] = icmp sgt i64 %a, %b
; CHECK-NEXT: ret i1 [[V]]
;
%t = sub nsw i64 %a, %b
%v = icmp sgt i64 %t, 0
ret i1 %v
}
define <2 x i1> @f2_vec(<2 x i64> %a, <2 x i64> %b) {
; CHECK-LABEL: @f2_vec(
; CHECK-NEXT: [[V:%.*]] = icmp sgt <2 x i64> %a, %b
; CHECK-NEXT: ret <2 x i1> [[V]]
;
%t = sub nsw <2 x i64> %a, %b
%v = icmp sgt <2 x i64> %t, zeroinitializer
ret <2 x i1> %v
}
define i1 @f3(i64 %a, i64 %b) {
; CHECK-LABEL: @f3(
; CHECK-NEXT: [[V:%.*]] = icmp slt i64 %a, %b
; CHECK-NEXT: ret i1 [[V]]
;
%t = sub nsw i64 %a, %b
%v = icmp slt i64 %t, 0
ret i1 %v
}
define <2 x i1> @f3_vec(<2 x i64> %a, <2 x i64> %b) {
; CHECK-LABEL: @f3_vec(
; CHECK-NEXT: [[V:%.*]] = icmp slt <2 x i64> %a, %b
; CHECK-NEXT: ret <2 x i1> [[V]]
;
%t = sub nsw <2 x i64> %a, %b
%v = icmp slt <2 x i64> %t, zeroinitializer
ret <2 x i1> %v
}
define i1 @f4(i64 %a, i64 %b) {
; CHECK-LABEL: @f4(
; CHECK-NEXT: [[V:%.*]] = icmp sle i64 %a, %b
; CHECK-NEXT: ret i1 [[V]]
;
%t = sub nsw i64 %a, %b
%v = icmp sle i64 %t, 0
ret i1 %v
}
define <2 x i1> @f4_vec(<2 x i64> %a, <2 x i64> %b) {
; CHECK-LABEL: @f4_vec(
; CHECK-NEXT: [[V:%.*]] = icmp sle <2 x i64> %a, %b
; CHECK-NEXT: ret <2 x i1> [[V]]
;
%t = sub nsw <2 x i64> %a, %b
%v = icmp slt <2 x i64> %t, <i64 1, i64 1>
ret <2 x i1> %v
}
define i32 @f5(i8 %a, i8 %b) {
; CHECK-LABEL: @f5(
; CHECK-NEXT: [[CONV:%.*]] = zext i8 %a to i32
; CHECK-NEXT: [[CONV3:%.*]] = zext i8 %b to i32
; CHECK-NEXT: [[SUB:%.*]] = sub nsw i32 [[CONV]], [[CONV3]]
; CHECK-NEXT: [[CMP4:%.*]] = icmp slt i32 [[SUB]], 0
; CHECK-NEXT: [[SUB7:%.*]] = sub nsw i32 0, [[SUB]]
; CHECK-NEXT: [[SUB7_SUB:%.*]] = select i1 [[CMP4]], i32 [[SUB7]], i32 [[SUB]]
; CHECK-NEXT: ret i32 [[SUB7_SUB]]
;
%conv = zext i8 %a to i32
%conv3 = zext i8 %b to i32
%sub = sub nsw i32 %conv, %conv3
%cmp4 = icmp slt i32 %sub, 0
%sub7 = sub nsw i32 0, %sub
%sub7.sub = select i1 %cmp4, i32 %sub7, i32 %sub
ret i32 %sub7.sub
}
define i32 @f6(i32 %a, i32 %b) {
; CHECK-LABEL: @f6(
; CHECK-NEXT: [[CMP_UNSHIFTED:%.*]] = xor i32 %a, %b
; CHECK-NEXT: [[CMP_MASK:%.*]] = and i32 [[CMP_UNSHIFTED]], 255
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[CMP:%.*]].mask, 0
; CHECK-NEXT: [[S:%.*]] = select i1 [[CMP]], i32 10000, i32 0
; CHECK-NEXT: ret i32 [[S]]
;
%sext = shl i32 %a, 24
%conv = ashr i32 %sext, 24
%sext6 = shl i32 %b, 24
%conv4 = ashr i32 %sext6, 24
%cmp = icmp eq i32 %conv, %conv4
%s = select i1 %cmp, i32 10000, i32 0
ret i32 %s
}
define i32 @f7(i32 %a, i32 %b) {
; CHECK-LABEL: @f7(
; CHECK-NEXT: [[CMP_UNSHIFTED:%.*]] = xor i32 %a, %b
; CHECK-NEXT: [[CMP_MASK:%.*]] = and i32 [[CMP_UNSHIFTED]], 511
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[CMP_MASK]], 0
; CHECK-NEXT: [[S:%.*]] = select i1 [[CMP]], i32 0, i32 10000
; CHECK-NEXT: ret i32 [[S]]
;
%sext = shl i32 %a, 23
%sext6 = shl i32 %b, 23
%cmp = icmp ne i32 %sext, %sext6
%s = select i1 %cmp, i32 10000, i32 0
ret i32 %s
}
define i1 @f8(i32 %val, i32 %lim) {
; CHECK-LABEL: @f8(
; CHECK-NEXT: [[R:%.*]] = icmp ne i32 %lim, 0
; CHECK-NEXT: ret i1 [[R]]
;
%lim.sub = add i32 %lim, -1
%val.and = and i32 %val, %lim.sub
%r = icmp ult i32 %val.and, %lim
ret i1 %r
}
define i1 @f9(i32 %val, i32 %lim) {
; CHECK-LABEL: @f9(
; CHECK-NEXT: [[R:%.*]] = icmp ne i32 %lim, 0
; CHECK-NEXT: ret i1 [[R]]
;
%lim.sub = sub i32 %lim, 1
%val.and = and i32 %val, %lim.sub
%r = icmp ult i32 %val.and, %lim
ret i1 %r
}
define i1 @f10(i16 %p) {
; CHECK-LABEL: @f10(
; CHECK-NEXT: [[CMP580:%.*]] = icmp uge i16 %p, mul (i16 zext (i8 ptrtoint (i1 (i16)* @f10 to i8) to i16), i16 zext (i8 ptrtoint (i1 (i16)* @f10 to i8) to i16))
; CHECK-NEXT: ret i1 [[CMP580]]
;
%cmp580 = icmp ule i16 mul (i16 zext (i8 ptrtoint (i1 (i16)* @f10 to i8) to i16), i16 zext (i8 ptrtoint (i1 (i16)* @f10 to i8) to i16)), %p
ret i1 %cmp580
}
; Note: fptosi is used in various tests below to ensure that operand complexity
; canonicalization does not kick in, which would make some of the tests
; equivalent to one another.
define i1 @cmp_sgt_rhs_dec(float %x, i32 %i) {
; CHECK-LABEL: @cmp_sgt_rhs_dec(
; CHECK-NEXT: [[CONV:%.*]] = fptosi float %x to i32
; CHECK-NEXT: [[CMP:%.*]] = icmp sge i32 [[CONV]], %i
; CHECK-NEXT: ret i1 [[CMP]]
;
%conv = fptosi float %x to i32
%dec = sub nsw i32 %i, 1
%cmp = icmp sgt i32 %conv, %dec
ret i1 %cmp
}
define i1 @cmp_sle_rhs_dec(float %x, i32 %i) {
; CHECK-LABEL: @cmp_sle_rhs_dec(
; CHECK-NEXT: [[CONV:%.*]] = fptosi float %x to i32
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[CONV]], %i
; CHECK-NEXT: ret i1 [[CMP]]
;
%conv = fptosi float %x to i32
%dec = sub nsw i32 %i, 1
%cmp = icmp sle i32 %conv, %dec
ret i1 %cmp
}
define i1 @cmp_sge_rhs_inc(float %x, i32 %i) {
; CHECK-LABEL: @cmp_sge_rhs_inc(
; CHECK-NEXT: [[CONV:%.*]] = fptosi float %x to i32
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[CONV]], %i
; CHECK-NEXT: ret i1 [[CMP]]
;
%conv = fptosi float %x to i32
%inc = add nsw i32 %i, 1
%cmp = icmp sge i32 %conv, %inc
ret i1 %cmp
}
define i1 @cmp_slt_rhs_inc(float %x, i32 %i) {
; CHECK-LABEL: @cmp_slt_rhs_inc(
; CHECK-NEXT: [[CONV:%.*]] = fptosi float %x to i32
; CHECK-NEXT: [[CMP:%.*]] = icmp sle i32 [[CONV]], %i
; CHECK-NEXT: ret i1 [[CMP]]
;
%conv = fptosi float %x to i32
%inc = add nsw i32 %i, 1
%cmp = icmp slt i32 %conv, %inc
ret i1 %cmp
}
define i1 @PR26407(i32 %x, i32 %y) {
; CHECK-LABEL: @PR26407(
; CHECK-NEXT: [[ADDX:%.*]] = add i32 %x, 2147483647
; CHECK-NEXT: [[ADDY:%.*]] = add i32 %y, 2147483647
; CHECK-NEXT: [[CMP:%.*]] = icmp uge i32 [[ADDX]], [[ADDY]]
; CHECK-NEXT: ret i1 [[CMP]]
;
%addx = add i32 %x, 2147483647
%addy = add i32 %y, 2147483647
%cmp = icmp uge i32 %addx, %addy
ret i1 %cmp
}
define i1 @cmp_inverse_mask_bits_set_eq(i32 %x) {
; CHECK-LABEL: @cmp_inverse_mask_bits_set_eq(
; CHECK-NEXT: [[TMP1:%.*]] = and i32 %x, -43
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP1]], -43
; CHECK-NEXT: ret i1 [[CMP]]
;
%or = or i32 %x, 42
%cmp = icmp eq i32 %or, -1
ret i1 %cmp
}
define <2 x i1> @cmp_inverse_mask_bits_set_eq_vec(<2 x i32> %x) {
; CHECK-LABEL: @cmp_inverse_mask_bits_set_eq_vec(
; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i32> %x, <i32 -43, i32 -43>
; CHECK-NEXT: [[CMP:%.*]] = icmp eq <2 x i32> [[TMP1]], <i32 -43, i32 -43>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%or = or <2 x i32> %x, <i32 42, i32 42>
%cmp = icmp eq <2 x i32> %or, <i32 -1, i32 -1>
ret <2 x i1> %cmp
}
define i1 @cmp_inverse_mask_bits_set_ne(i32 %x) {
; CHECK-LABEL: @cmp_inverse_mask_bits_set_ne(
; CHECK-NEXT: [[TMP1:%.*]] = and i32 %x, -43
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[TMP1]], -43
; CHECK-NEXT: ret i1 [[CMP]]
;
%or = or i32 %x, 42
%cmp = icmp ne i32 %or, -1
ret i1 %cmp
}
; CHECK-LABEL: @idom_sign_bit_check_edge_dominates
define void @idom_sign_bit_check_edge_dominates(i64 %a) {
entry:
%cmp = icmp slt i64 %a, 0
br i1 %cmp, label %land.lhs.true, label %lor.rhs
land.lhs.true: ; preds = %entry
br label %lor.end
; CHECK-LABEL: lor.rhs:
; CHECK-NOT: icmp sgt i64 %a, 0
; CHECK: icmp eq i64 %a, 0
lor.rhs: ; preds = %entry
%cmp2 = icmp sgt i64 %a, 0
br i1 %cmp2, label %land.rhs, label %lor.end
land.rhs: ; preds = %lor.rhs
br label %lor.end
lor.end: ; preds = %land.rhs, %lor.rhs, %land.lhs.true
ret void
}
; CHECK-LABEL: @idom_sign_bit_check_edge_not_dominates
define void @idom_sign_bit_check_edge_not_dominates(i64 %a) {
entry:
%cmp = icmp slt i64 %a, 0
br i1 %cmp, label %land.lhs.true, label %lor.rhs
land.lhs.true: ; preds = %entry
br i1 undef, label %lor.end, label %lor.rhs
; CHECK-LABEL: lor.rhs:
; CHECK: icmp sgt i64 %a, 0
; CHECK-NOT: icmp eq i64 %a, 0
lor.rhs: ; preds = %land.lhs.true, %entry
%cmp2 = icmp sgt i64 %a, 0
br i1 %cmp2, label %land.rhs, label %lor.end
land.rhs: ; preds = %lor.rhs
br label %lor.end
lor.end: ; preds = %land.rhs, %lor.rhs, %land.lhs.true
ret void
}
; CHECK-LABEL: @idom_sign_bit_check_edge_dominates_select
define void @idom_sign_bit_check_edge_dominates_select(i64 %a, i64 %b) {
entry:
%cmp = icmp slt i64 %a, 5
br i1 %cmp, label %land.lhs.true, label %lor.rhs
land.lhs.true: ; preds = %entry
br label %lor.end
; CHECK-LABEL: lor.rhs:
; CHECK-NOT: [[B:%.*]] = icmp sgt i64 %a, 5
; CHECK: [[C:%.*]] = icmp eq i64 %a, %b
; CHECK-NOT: [[D:%.*]] = select i1 [[B]], i64 %a, i64 5
; CHECK-NOT: icmp ne i64 [[D]], %b
; CHECK-NEXT: br i1 [[C]], label %lor.end, label %land.rhs
lor.rhs: ; preds = %entry
%cmp2 = icmp sgt i64 %a, 5
%select = select i1 %cmp2, i64 %a, i64 5
%cmp3 = icmp ne i64 %select, %b
br i1 %cmp3, label %land.rhs, label %lor.end
land.rhs: ; preds = %lor.rhs
br label %lor.end
lor.end: ; preds = %land.rhs, %lor.rhs, %land.lhs.true
ret void
}
; CHECK-LABEL: @idom_zbranch
define void @idom_zbranch(i64 %a) {
entry:
%cmp = icmp sgt i64 %a, 0
br i1 %cmp, label %lor.end, label %lor.rhs
; CHECK-LABEL: lor.rhs:
; CHECK: icmp slt i64 %a, 0
; CHECK-NOT: icmp eq i64 %a, 0
lor.rhs: ; preds = %entry
%cmp2 = icmp slt i64 %a, 0
br i1 %cmp2, label %land.rhs, label %lor.end
land.rhs: ; preds = %lor.rhs
br label %lor.end
lor.end: ; preds = %land.rhs, %lor.rhs
ret void
}
; CHECK-LABEL: @idom_not_zbranch
define void @idom_not_zbranch(i32 %a, i32 %b) {
entry:
%cmp = icmp sgt i32 %a, 0
br i1 %cmp, label %return, label %if.end
; CHECK-LABEL: if.end:
; CHECK-NOT: [[B:%.*]] = icmp slt i32 %a, 0
; CHECK: [[C:%.*]] = icmp eq i32 %a, %b
; CHECK-NOT: [[D:%.*]] = select i1 [[B]], i32 %a, i32 0
; CHECK-NOT: icmp ne i32 [[D]], %b
; CHECK-NEXT: br i1 [[C]], label %return, label %if.then3
if.end: ; preds = %entry
%cmp1 = icmp slt i32 %a, 0
%a. = select i1 %cmp1, i32 %a, i32 0
%cmp2 = icmp ne i32 %a., %b
br i1 %cmp2, label %if.then3, label %return
if.then3: ; preds = %if.end
br label %return
return: ; preds = %if.end, %entry, %if.then3
ret void
}
; When canonicalizing to 'gt/lt', make sure the constant is correct.
define i1 @PR27792(i128 %a) {
; CHECK-LABEL: @PR27792(
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i128 %a, -1
; CHECK-NEXT: ret i1 [[CMP]]
;
%cmp = icmp sge i128 %a, 0
ret i1 %cmp
}
define i1 @PR27792_2(i128 %a) {
; CHECK-LABEL: @PR27792_2(
; CHECK-NEXT: [[B:%.*]] = icmp ne i128 %a, 0
; CHECK-NEXT: ret i1 [[B]]
;
%b = icmp uge i128 %a, 1
ret i1 %b
}
define i1 @ugtMaxSignedVal(i8 %a) {
; CHECK-LABEL: @ugtMaxSignedVal(
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 %a, 0
; CHECK-NEXT: ret i1 [[CMP]]
;
%cmp = icmp ugt i8 %a, 127
ret i1 %cmp
}
define <2 x i1> @ugtMaxSignedValVec(<2 x i8> %a) {
; CHECK-LABEL: @ugtMaxSignedValVec(
; CHECK-NEXT: [[CMP:%.*]] = icmp slt <2 x i8> %a, zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%cmp = icmp ugt <2 x i8> %a, <i8 127, i8 127>
ret <2 x i1> %cmp
}
define i1 @ugtKnownBits(i8 %a) {
; CHECK-LABEL: @ugtKnownBits(
; CHECK-NEXT: [[B:%.*]] = and i8 %a, 17
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[B]], 17
; CHECK-NEXT: ret i1 [[CMP]]
;
%b = and i8 %a, 17
%cmp = icmp ugt i8 %b, 16
ret i1 %cmp
}
define <2 x i1> @ugtKnownBitsVec(<2 x i8> %a) {
; CHECK-LABEL: @ugtKnownBitsVec(
; CHECK-NEXT: [[B:%.*]] = and <2 x i8> %a, <i8 17, i8 17>
; CHECK-NEXT: [[CMP:%.*]] = icmp eq <2 x i8> [[B]], <i8 17, i8 17>
; CHECK-NEXT: ret <2 x i1> [[CMP]]
;
%b = and <2 x i8> %a, <i8 17, i8 17>
%cmp = icmp ugt <2 x i8> %b, <i8 16, i8 16>
ret <2 x i1> %cmp
}
define i1 @or_ptrtoint_mismatch(i8* %p, i32* %q) {
; CHECK-LABEL: define i1 @or_ptrtoint_mismatch(i8* %p, i32* %q)
; CHECK: [[pc:%.*]] = icmp eq i8* %p, null
; CHECK: [[qc:%.*]] = icmp eq i32* %q, null
; CHECK: [[b:%.*]] = and i1 [[pc]], [[qc]]
; CHECK: ret i1 [[b]]
%pp = ptrtoint i8* %p to i64
%qq = ptrtoint i32* %q to i64
%o = or i64 %pp, %qq
%b = icmp eq i64 %o, 0
ret i1 %b
}
define i1 @icmp_add1_ugt(i32 %x, i32 %y) {
; CHECK-LABEL: @icmp_add1_ugt(
; CHECK-NEXT: [[CMP:%.*]] = icmp uge i32 %x, %y
; CHECK-NEXT: ret i1 [[CMP]]
;
%add = add nuw i32 %x, 1
%cmp = icmp ugt i32 %add, %y
ret i1 %cmp
}
define i1 @icmp_add1_ule(i32 %x, i32 %y) {
; CHECK-LABEL: @icmp_add1_ule(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 %x, %y
; CHECK-NEXT: ret i1 [[CMP]]
;
%add = add nuw i32 %x, 1
%cmp = icmp ule i32 %add, %y
ret i1 %cmp
}
define i1 @cmp_uge_rhs_inc(float %x, i32 %i) {
; CHECK-LABEL: @cmp_uge_rhs_inc(
; CHECK-NEXT: [[CONV:%.*]] = fptosi float %x to i32
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[CONV]], %i
; CHECK-NEXT: ret i1 [[CMP]]
;
%conv = fptosi float %x to i32
%inc = add nuw i32 %i, 1
%cmp = icmp uge i32 %conv, %inc
ret i1 %cmp
}
define i1 @cmp_ult_rhs_inc(float %x, i32 %i) {
; CHECK-LABEL: @cmp_ult_rhs_inc(
; CHECK-NEXT: [[CONV:%.*]] = fptosi float %x to i32
; CHECK-NEXT: [[CMP:%.*]] = icmp ule i32 [[CONV]], %i
; CHECK-NEXT: ret i1 [[CMP]]
;
%conv = fptosi float %x to i32
%inc = add nuw i32 %i, 1
%cmp = icmp ult i32 %conv, %inc
ret i1 %cmp
}
define i1 @cmp_sge_lhs_inc(i32 %x, i32 %y) {
; CHECK-LABEL: @cmp_sge_lhs_inc(
; CHECK-NEXT: [[INC:%.*]] = add
; CHECK-NEXT: [[CMP:%.*]] = icmp sge i32 [[INC]], %y
; CHECK-NEXT: ret i1 [[CMP]]
;
%inc = add nsw i32 %x, 1
%cmp = icmp sge i32 %inc, %y
ret i1 %cmp
}
define i1 @cmp_uge_lhs_inc(i32 %x, i32 %y) {
; CHECK-LABEL: @cmp_uge_lhs_inc(
; CHECK-NEXT: [[INC:%.*]] = add
; CHECK-NEXT: [[CMP:%.*]] = icmp uge i32 [[INC]], %y
; CHECK-NEXT: ret i1 [[CMP]]
;
%inc = add nuw i32 %x, 1
%cmp = icmp uge i32 %inc, %y
ret i1 %cmp
}
define i1 @cmp_sgt_lhs_dec(i32 %x, i32 %y) {
; CHECK-LABEL: @cmp_sgt_lhs_dec(
; CHECK-NEXT: [[DEC:%.*]] = {{add|sub}}
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[DEC]], %y
; CHECK-NEXT: ret i1 [[CMP]]
;
%dec = sub nsw i32 %x, 1
%cmp = icmp sgt i32 %dec, %y
ret i1 %cmp
}
define i1 @cmp_ugt_lhs_dec(i32 %x, i32 %y) {
; CHECK-LABEL: @cmp_ugt_lhs_dec(
; CHECK-NEXT: [[DEC:%.*]] = {{add|sub}}
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[DEC]], %y
; CHECK-NEXT: ret i1 [[CMP]]
;
%dec = sub nuw i32 %x, 1
%cmp = icmp ugt i32 %dec, %y
ret i1 %cmp
}
define i1 @cmp_sle_rhs_inc(float %x, i32 %y) {
; CHECK-LABEL: @cmp_sle_rhs_inc(
; CHECK-NEXT: [[CONV:%.*]] = fptosi float %x to i32
; CHECK-NEXT: [[INC:%.*]] = add
; CHECK-NEXT: [[CMP:%.*]] = icmp sge i32 [[INC]], [[CONV]]
; CHECK-NEXT: ret i1 [[CMP]]
;
%conv = fptosi float %x to i32
%inc = add nsw i32 %y, 1
%cmp = icmp sle i32 %conv, %inc
ret i1 %cmp
}
define i1 @cmp_ule_rhs_inc(float %x, i32 %y) {
; CHECK-LABEL: @cmp_ule_rhs_inc(
; CHECK-NEXT: [[CONV:%.*]] = fptosi float %x to i32
; CHECK-NEXT: [[INC:%.*]] = add
; CHECK-NEXT: [[CMP:%.*]] = icmp uge i32 [[INC]], [[CONV]]
; CHECK-NEXT: ret i1 [[CMP]]
;
%conv = fptosi float %x to i32
%inc = add nuw i32 %y, 1
%cmp = icmp ule i32 %conv, %inc
ret i1 %cmp
}
define i1 @cmp_slt_rhs_dec(float %x, i32 %y) {
; CHECK-LABEL: @cmp_slt_rhs_dec(
; CHECK-NEXT: [[CONV:%.*]] = fptosi float %x to i32
; CHECK-NEXT: [[DEC:%.*]] = {{add|sub}}
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[DEC]], [[CONV]]
; CHECK-NEXT: ret i1 [[CMP]]
;
%conv = fptosi float %x to i32
%dec = sub nsw i32 %y, 1
%cmp = icmp slt i32 %conv, %dec
ret i1 %cmp
}
define i1 @cmp_ult_rhs_dec(float %x, i32 %y) {
; CHECK-LABEL: @cmp_ult_rhs_dec(
; CHECK-NEXT: [[CONV:%.*]] = fptosi float %x to i32
; CHECK-NEXT: [[DEC:%.*]] = {{add|sub}}
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[DEC]], [[CONV]]
; CHECK-NEXT: ret i1 [[CMP]]
;
%conv = fptosi float %x to i32
%dec = sub nuw i32 %y, 1
%cmp = icmp ult i32 %conv, %dec
ret i1 %cmp
}
define i1 @eq_add_constants(i32 %x, i32 %y) {
; CHECK-LABEL: @eq_add_constants(
; CHECK-NEXT: [[C:%.*]] = icmp eq i32 %x, %y
; CHECK-NEXT: ret i1 [[C]]
;
%A = add i32 %x, 5
%B = add i32 %y, 5
%C = icmp eq i32 %A, %B
ret i1 %C
}
define i1 @eq_mul_constants(i32 %x, i32 %y) {
; CHECK-LABEL: @eq_mul_constants(
; CHECK-NEXT: [[C:%.*]] = icmp eq i32 %x, %y
; CHECK-NEXT: ret i1 [[C]]
;
%A = mul i32 %x, 5
%B = mul i32 %y, 5
%C = icmp eq i32 %A, %B
ret i1 %C
}
define <2 x i1> @eq_mul_constants_splat(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @eq_mul_constants_splat(
; CHECK-NEXT: [[C:%.*]] = icmp ne <2 x i32> %x, %y
; CHECK-NEXT: ret <2 x i1> [[C]]
;
%A = mul <2 x i32> %x, <i32 5, i32 5>
%B = mul <2 x i32> %y, <i32 5, i32 5>
%C = icmp ne <2 x i32> %A, %B
ret <2 x i1> %C
}
; If the multiply constant has any trailing zero bits, we get something completely different.
; We mask off the high bits of each input and then convert:
; (X&Z) == (Y&Z) -> (X^Y) & Z == 0
define i1 @eq_mul_constants_with_tz(i32 %x, i32 %y) {
; CHECK-LABEL: @eq_mul_constants_with_tz(
; CHECK-NEXT: [[TMP1:%.*]] = xor i32 %x, %y
; CHECK-NEXT: [[TMP2:%.*]] = and i32 [[TMP1]], 1073741823
; CHECK-NEXT: [[C:%.*]] = icmp ne i32 [[TMP2]], 0
; CHECK-NEXT: ret i1 [[C]]
;
%A = mul i32 %x, 12
%B = mul i32 %y, 12
%C = icmp ne i32 %A, %B
ret i1 %C
}
define <2 x i1> @eq_mul_constants_with_tz_splat(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @eq_mul_constants_with_tz_splat(
; CHECK-NEXT: [[TMP1:%.*]] = xor <2 x i32> %x, %y
; CHECK-NEXT: [[TMP2:%.*]] = and <2 x i32> [[TMP1]], <i32 1073741823, i32 1073741823>
; CHECK-NEXT: [[C:%.*]] = icmp eq <2 x i32> [[TMP2]], zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[C]]
;
%A = mul <2 x i32> %x, <i32 12, i32 12>
%B = mul <2 x i32> %y, <i32 12, i32 12>
%C = icmp eq <2 x i32> %A, %B
ret <2 x i1> %C
}
declare i32 @llvm.bswap.i32(i32)
define i1 @bswap_ne(i32 %x, i32 %y) {
; CHECK-LABEL: @bswap_ne(
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 %x, %y
; CHECK-NEXT: ret i1 [[CMP]]
;
%swapx = call i32 @llvm.bswap.i32(i32 %x)
%swapy = call i32 @llvm.bswap.i32(i32 %y)
%cmp = icmp ne i32 %swapx, %swapy
ret i1 %cmp
}
declare <8 x i16> @llvm.bswap.v8i16(<8 x i16>)
define <8 x i1> @bswap_vec_eq(<8 x i16> %x, <8 x i16> %y) {
; CHECK-LABEL: @bswap_vec_eq(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq <8 x i16> %x, %y
; CHECK-NEXT: ret <8 x i1> [[CMP]]
;
%swapx = call <8 x i16> @llvm.bswap.v8i16(<8 x i16> %x)
%swapy = call <8 x i16> @llvm.bswap.v8i16(<8 x i16> %y)
%cmp = icmp eq <8 x i16> %swapx, %swapy
ret <8 x i1> %cmp
}
declare i64 @llvm.bitreverse.i64(i64)
define i1 @bitreverse_eq(i64 %x, i64 %y) {
; CHECK-LABEL: @bitreverse_eq(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 %x, %y
; CHECK-NEXT: ret i1 [[CMP]]
;
%revx = call i64 @llvm.bitreverse.i64(i64 %x)
%revy = call i64 @llvm.bitreverse.i64(i64 %y)
%cmp = icmp eq i64 %revx, %revy
ret i1 %cmp
}
declare <8 x i16> @llvm.bitreverse.v8i16(<8 x i16>)
define <8 x i1> @bitreverse_vec_ne(<8 x i16> %x, <8 x i16> %y) {
; CHECK-LABEL: @bitreverse_vec_ne(
; CHECK-NEXT: [[CMP:%.*]] = icmp ne <8 x i16> %x, %y
; CHECK-NEXT: ret <8 x i1> [[CMP]]
;
%revx = call <8 x i16> @llvm.bitreverse.v8i16(<8 x i16> %x)
%revy = call <8 x i16> @llvm.bitreverse.v8i16(<8 x i16> %y)
%cmp = icmp ne <8 x i16> %revx, %revy
ret <8 x i1> %cmp
}
; These perform a comparison of a value known to be between 4 and 5 with a value between 5 and 7.
; They should all simplify to equality compares.
define i1 @knownbits1(i8 %a, i8 %b) {
; CHECK-LABEL: @knownbits1(
; CHECK-NEXT: [[A1:%.*]] = and i8 [[A:%.*]], 1
; CHECK-NEXT: [[A2:%.*]] = or i8 [[A1]], 4
; CHECK-NEXT: [[B1:%.*]] = and i8 [[B:%.*]], 2
; CHECK-NEXT: [[B2:%.*]] = or i8 [[B1]], 5
; CHECK-NEXT: [[C:%.*]] = icmp eq i8 [[A2]], [[B2]]
; CHECK-NEXT: ret i1 [[C]]
;
%a1 = and i8 %a, 5
%a2 = or i8 %a1, 4
%b1 = and i8 %b, 7
%b2 = or i8 %b1, 5
%c = icmp uge i8 %a2, %b2
ret i1 %c
}
define i1 @knownbits2(i8 %a, i8 %b) {
; CHECK-LABEL: @knownbits2(
; CHECK-NEXT: [[A1:%.*]] = and i8 [[A:%.*]], 1
; CHECK-NEXT: [[A2:%.*]] = or i8 [[A1]], 4
; CHECK-NEXT: [[B1:%.*]] = and i8 [[B:%.*]], 2
; CHECK-NEXT: [[B2:%.*]] = or i8 [[B1]], 5
; CHECK-NEXT: [[C:%.*]] = icmp ne i8 [[A2]], [[B2]]
; CHECK-NEXT: ret i1 [[C]]
;
%a1 = and i8 %a, 5
%a2 = or i8 %a1, 4
%b1 = and i8 %b, 7
%b2 = or i8 %b1, 5
%c = icmp ult i8 %a2, %b2
ret i1 %c
}
define i1 @knownbits3(i8 %a, i8 %b) {
; CHECK-LABEL: @knownbits3(
; CHECK-NEXT: [[A1:%.*]] = and i8 [[A:%.*]], 1
; CHECK-NEXT: [[A2:%.*]] = or i8 [[A1]], 4
; CHECK-NEXT: [[B1:%.*]] = and i8 [[B:%.*]], 2
; CHECK-NEXT: [[B2:%.*]] = or i8 [[B1]], 5
; CHECK-NEXT: [[C:%.*]] = icmp eq i8 [[B2]], [[A2]]
; CHECK-NEXT: ret i1 [[C]]
;
%a1 = and i8 %a, 5
%a2 = or i8 %a1, 4
%b1 = and i8 %b, 7
%b2 = or i8 %b1, 5
%c = icmp ule i8 %b2, %a2
ret i1 %c
}
define <2 x i1> @knownbits4(<2 x i8> %a, <2 x i8> %b) {
; CHECK-LABEL: @knownbits4(
; CHECK-NEXT: [[A1:%.*]] = and <2 x i8> [[A:%.*]], <i8 1, i8 1>
; CHECK-NEXT: [[A2:%.*]] = or <2 x i8> [[A1]], <i8 4, i8 4>
; CHECK-NEXT: [[B1:%.*]] = and <2 x i8> [[B:%.*]], <i8 2, i8 2>
; CHECK-NEXT: [[B2:%.*]] = or <2 x i8> [[B1]], <i8 5, i8 5>
; CHECK-NEXT: [[C:%.*]] = icmp ne <2 x i8> [[B2]], [[A2]]
; CHECK-NEXT: ret <2 x i1> [[C]]
;
%a1 = and <2 x i8> %a, <i8 5, i8 5>
%a2 = or <2 x i8> %a1, <i8 4, i8 4>
%b1 = and <2 x i8> %b, <i8 7, i8 7>
%b2 = or <2 x i8> %b1, <i8 5, i8 5>
%c = icmp ugt <2 x i8> %b2, %a2
ret <2 x i1> %c
}
; These are the signed versions of the above. One value is less than or equal to 5, but maybe negative.
; The other is known to be a value 5-7. These should simplify to equality comparisons.
define i1 @knownbits5(i8 %a, i8 %b) {
; CHECK-LABEL: @knownbits5(
; CHECK-NEXT: [[A1:%.*]] = and i8 [[A:%.*]], -127
; CHECK-NEXT: [[A2:%.*]] = or i8 [[A1]], 4
; CHECK-NEXT: [[B1:%.*]] = and i8 [[B:%.*]], 2
; CHECK-NEXT: [[B2:%.*]] = or i8 [[B1]], 5
; CHECK-NEXT: [[C:%.*]] = icmp eq i8 [[A2]], [[B2]]
; CHECK-NEXT: ret i1 [[C]]
;
%a1 = and i8 %a, 133
%a2 = or i8 %a1, 4
%b1 = and i8 %b, 7
%b2 = or i8 %b1, 5
%c = icmp sge i8 %a2, %b2
ret i1 %c
}
define i1 @knownbits6(i8 %a, i8 %b) {
; CHECK-LABEL: @knownbits6(
; CHECK-NEXT: [[A1:%.*]] = and i8 [[A:%.*]], -127
; CHECK-NEXT: [[A2:%.*]] = or i8 [[A1]], 4
; CHECK-NEXT: [[B1:%.*]] = and i8 [[B:%.*]], 2
; CHECK-NEXT: [[B2:%.*]] = or i8 [[B1]], 5
; CHECK-NEXT: [[C:%.*]] = icmp ne i8 [[A2]], [[B2]]
; CHECK-NEXT: ret i1 [[C]]
;
%a1 = and i8 %a, 133
%a2 = or i8 %a1, 4
%b1 = and i8 %b, 7
%b2 = or i8 %b1, 5
%c = icmp slt i8 %a2, %b2
ret i1 %c
}
define <2 x i1> @knownbits7(<2 x i8> %a, <2 x i8> %b) {
; CHECK-LABEL: @knownbits7(
; CHECK-NEXT: [[A1:%.*]] = and <2 x i8> [[A:%.*]], <i8 -127, i8 -127>
; CHECK-NEXT: [[A2:%.*]] = or <2 x i8> [[A1]], <i8 4, i8 4>
; CHECK-NEXT: [[B1:%.*]] = and <2 x i8> [[B:%.*]], <i8 2, i8 2>
; CHECK-NEXT: [[B2:%.*]] = or <2 x i8> [[B1]], <i8 5, i8 5>
; CHECK-NEXT: [[C:%.*]] = icmp eq <2 x i8> [[B2]], [[A2]]
; CHECK-NEXT: ret <2 x i1> [[C]]
;
%a1 = and <2 x i8> %a, <i8 133, i8 133>
%a2 = or <2 x i8> %a1, <i8 4, i8 4>
%b1 = and <2 x i8> %b, <i8 7, i8 7>
%b2 = or <2 x i8> %b1, <i8 5, i8 5>
%c = icmp sle <2 x i8> %b2, %a2
ret <2 x i1> %c
}
define i1 @knownbits8(i8 %a, i8 %b) {
; CHECK-LABEL: @knownbits8(
; CHECK-NEXT: [[A1:%.*]] = and i8 [[A:%.*]], -127
; CHECK-NEXT: [[A2:%.*]] = or i8 [[A1]], 4
; CHECK-NEXT: [[B1:%.*]] = and i8 [[B:%.*]], 2
; CHECK-NEXT: [[B2:%.*]] = or i8 [[B1]], 5
; CHECK-NEXT: [[C:%.*]] = icmp ne i8 [[B2]], [[A2]]
; CHECK-NEXT: ret i1 [[C]]
;
%a1 = and i8 %a, 133
%a2 = or i8 %a1, 4
%b1 = and i8 %b, 7
%b2 = or i8 %b1, 5
%c = icmp sgt i8 %b2, %a2
ret i1 %c
}
; Make sure InstCombine doesn't try too hard to simplify the icmp and break the abs idiom
define i32 @abs_preserve(i32 %x) {
; CHECK-LABEL: @abs_preserve(
; CHECK-NEXT: [[A:%.*]] = shl nsw i32 [[X:%.*]], 1
; CHECK-NEXT: [[C:%.*]] = icmp sgt i32 [[A]], -1
; CHECK-NEXT: [[NEGA:%.*]] = sub i32 0, [[A]]
; CHECK-NEXT: [[ABS:%.*]] = select i1 [[C]], i32 [[A]], i32 [[NEGA]]
; CHECK-NEXT: ret i32 [[ABS]]
;
%a = mul nsw i32 %x, 2
%c = icmp sge i32 %a, 0
%nega = sub i32 0, %a
%abs = select i1 %c, i32 %a, i32 %nega
ret i32 %abs
}
; Don't crash by assuming the compared values are integers.
declare void @llvm.assume(i1)
define i1 @PR35794(i32* %a) {
; CHECK-LABEL: @PR35794(
; CHECK-NEXT: [[MASKCOND:%.*]] = icmp eq i32* %a, null
; CHECK-NEXT: tail call void @llvm.assume(i1 [[MASKCOND]])
; CHECK-NEXT: ret i1 true
;
%cmp = icmp sgt i32* %a, inttoptr (i64 -1 to i32*)
%maskcond = icmp eq i32* %a, null
tail call void @llvm.assume(i1 %maskcond)
ret i1 %cmp
}
; Don't crash by assuming the compared values are integers.
define <2 x i1> @PR36583(<2 x i8*>) {
; CHECK-LABEL: @PR36583(
; CHECK-NEXT: [[RES:%.*]] = icmp eq <2 x i8*> %0, zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[RES]]
;
%cast = ptrtoint <2 x i8*> %0 to <2 x i64>
%res = icmp eq <2 x i64> %cast, zeroinitializer
ret <2 x i1> %res
}
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