forked from OSchip/llvm-project
748 lines
17 KiB
LLVM
748 lines
17 KiB
LLVM
; This test makes sure that these instructions are properly eliminated.
|
|
;
|
|
; RUN: opt < %s -instcombine -S | FileCheck %s
|
|
|
|
define i32 @test1(i32 %A) {
|
|
; CHECK: @test1
|
|
; CHECK: ret i32 %A
|
|
%B = shl i32 %A, 0 ; <i32> [#uses=1]
|
|
ret i32 %B
|
|
}
|
|
|
|
define i32 @test2(i8 %A) {
|
|
; CHECK: @test2
|
|
; CHECK: ret i32 0
|
|
%shift.upgrd.1 = zext i8 %A to i32 ; <i32> [#uses=1]
|
|
%B = shl i32 0, %shift.upgrd.1 ; <i32> [#uses=1]
|
|
ret i32 %B
|
|
}
|
|
|
|
define i32 @test3(i32 %A) {
|
|
; CHECK: @test3
|
|
; CHECK: ret i32 %A
|
|
%B = ashr i32 %A, 0 ; <i32> [#uses=1]
|
|
ret i32 %B
|
|
}
|
|
|
|
define i32 @test4(i8 %A) {
|
|
; CHECK: @test4
|
|
; CHECK: ret i32 0
|
|
%shift.upgrd.2 = zext i8 %A to i32 ; <i32> [#uses=1]
|
|
%B = ashr i32 0, %shift.upgrd.2 ; <i32> [#uses=1]
|
|
ret i32 %B
|
|
}
|
|
|
|
|
|
define i32 @test5(i32 %A) {
|
|
; CHECK: @test5
|
|
; CHECK: ret i32 undef
|
|
%B = lshr i32 %A, 32 ;; shift all bits out
|
|
ret i32 %B
|
|
}
|
|
|
|
define i32 @test5a(i32 %A) {
|
|
; CHECK: @test5a
|
|
; CHECK: ret i32 undef
|
|
%B = shl i32 %A, 32 ;; shift all bits out
|
|
ret i32 %B
|
|
}
|
|
|
|
define i32 @test5b() {
|
|
; CHECK: @test5b
|
|
; CHECK: ret i32 -1
|
|
%B = ashr i32 undef, 2 ;; top two bits must be equal, so not undef
|
|
ret i32 %B
|
|
}
|
|
|
|
define i32 @test5b2(i32 %A) {
|
|
; CHECK: @test5b2
|
|
; CHECK: ret i32 -1
|
|
%B = ashr i32 undef, %A ;; top %A bits must be equal, so not undef
|
|
ret i32 %B
|
|
}
|
|
|
|
define i32 @test6(i32 %A) {
|
|
; CHECK: @test6
|
|
; CHECK-NEXT: mul i32 %A, 6
|
|
; CHECK-NEXT: ret i32
|
|
%B = shl i32 %A, 1 ;; convert to an mul instruction
|
|
%C = mul i32 %B, 3
|
|
ret i32 %C
|
|
}
|
|
|
|
define i32 @test6a(i32 %A) {
|
|
; CHECK: @test6a
|
|
; CHECK-NEXT: mul i32 %A, 6
|
|
; CHECK-NEXT: ret i32
|
|
%B = mul i32 %A, 3
|
|
%C = shl i32 %B, 1 ;; convert to an mul instruction
|
|
ret i32 %C
|
|
}
|
|
|
|
define i32 @test7(i8 %A) {
|
|
; CHECK: @test7
|
|
; CHECK-NEXT: ret i32 -1
|
|
%shift.upgrd.3 = zext i8 %A to i32
|
|
%B = ashr i32 -1, %shift.upgrd.3 ;; Always equal to -1
|
|
ret i32 %B
|
|
}
|
|
|
|
;; (A << 5) << 3 === A << 8 == 0
|
|
define i8 @test8(i8 %A) {
|
|
; CHECK: @test8
|
|
; CHECK: ret i8 0
|
|
%B = shl i8 %A, 5 ; <i8> [#uses=1]
|
|
%C = shl i8 %B, 3 ; <i8> [#uses=1]
|
|
ret i8 %C
|
|
}
|
|
|
|
;; (A << 7) >> 7 === A & 1
|
|
define i8 @test9(i8 %A) {
|
|
; CHECK: @test9
|
|
; CHECK-NEXT: and i8 %A, 1
|
|
; CHECK-NEXT: ret i8
|
|
%B = shl i8 %A, 7 ; <i8> [#uses=1]
|
|
%C = lshr i8 %B, 7 ; <i8> [#uses=1]
|
|
ret i8 %C
|
|
}
|
|
|
|
;; This transformation is deferred to DAGCombine:
|
|
;; (A >> 7) << 7 === A & 128
|
|
;; The shl may be valuable to scalar evolution.
|
|
define i8 @test10(i8 %A) {
|
|
; CHECK: @test10
|
|
; CHECK-NEXT: and i8 %A, -128
|
|
; CHECK-NEXT: ret i8
|
|
%B = lshr i8 %A, 7 ; <i8> [#uses=1]
|
|
%C = shl i8 %B, 7 ; <i8> [#uses=1]
|
|
ret i8 %C
|
|
}
|
|
|
|
;; Allow the simplification when the lshr shift is exact.
|
|
define i8 @test10a(i8 %A) {
|
|
; CHECK: @test10a
|
|
; CHECK-NEXT: ret i8 %A
|
|
%B = lshr exact i8 %A, 7
|
|
%C = shl i8 %B, 7
|
|
ret i8 %C
|
|
}
|
|
|
|
;; This transformation is deferred to DAGCombine:
|
|
;; (A >> 3) << 4 === (A & 0x1F) << 1
|
|
;; The shl may be valuable to scalar evolution.
|
|
define i8 @test11(i8 %A) {
|
|
; CHECK: @test11
|
|
; CHECK: shl i8
|
|
; CHECK-NEXT: ret i8
|
|
%a = mul i8 %A, 3 ; <i8> [#uses=1]
|
|
%B = lshr i8 %a, 3 ; <i8> [#uses=1]
|
|
%C = shl i8 %B, 4 ; <i8> [#uses=1]
|
|
ret i8 %C
|
|
}
|
|
|
|
;; Allow the simplification in InstCombine when the lshr shift is exact.
|
|
define i8 @test11a(i8 %A) {
|
|
; CHECK: @test11a
|
|
; CHECK-NEXT: mul i8 %A, 6
|
|
; CHECK-NEXT: ret i8
|
|
%a = mul i8 %A, 3
|
|
%B = lshr exact i8 %a, 3
|
|
%C = shl i8 %B, 4
|
|
ret i8 %C
|
|
}
|
|
|
|
;; This is deferred to DAGCombine unless %B is single-use.
|
|
;; (A >> 8) << 8 === A & -256
|
|
define i32 @test12(i32 %A) {
|
|
; CHECK: @test12
|
|
; CHECK-NEXT: and i32 %A, -256
|
|
; CHECK-NEXT: ret i32
|
|
%B = ashr i32 %A, 8 ; <i32> [#uses=1]
|
|
%C = shl i32 %B, 8 ; <i32> [#uses=1]
|
|
ret i32 %C
|
|
}
|
|
|
|
;; This transformation is deferred to DAGCombine:
|
|
;; (A >> 3) << 4 === (A & -8) * 2
|
|
;; The shl may be valuable to scalar evolution.
|
|
define i8 @test13(i8 %A) {
|
|
; CHECK: @test13
|
|
; CHECK: shl i8
|
|
; CHECK-NEXT: ret i8
|
|
%a = mul i8 %A, 3 ; <i8> [#uses=1]
|
|
%B = ashr i8 %a, 3 ; <i8> [#uses=1]
|
|
%C = shl i8 %B, 4 ; <i8> [#uses=1]
|
|
ret i8 %C
|
|
}
|
|
|
|
define i8 @test13a(i8 %A) {
|
|
; CHECK: @test13a
|
|
; CHECK-NEXT: mul i8 %A, 6
|
|
; CHECK-NEXT: ret i8
|
|
%a = mul i8 %A, 3
|
|
%B = ashr exact i8 %a, 3
|
|
%C = shl i8 %B, 4
|
|
ret i8 %C
|
|
}
|
|
|
|
;; D = ((B | 1234) << 4) === ((B << 4)|(1234 << 4)
|
|
define i32 @test14(i32 %A) {
|
|
; CHECK: @test14
|
|
; CHECK-NEXT: %B = and i32 %A, -19760
|
|
; CHECK-NEXT: or i32 %B, 19744
|
|
; CHECK-NEXT: ret i32
|
|
%B = lshr i32 %A, 4 ; <i32> [#uses=1]
|
|
%C = or i32 %B, 1234 ; <i32> [#uses=1]
|
|
%D = shl i32 %C, 4 ; <i32> [#uses=1]
|
|
ret i32 %D
|
|
}
|
|
|
|
;; D = ((B | 1234) << 4) === ((B << 4)|(1234 << 4)
|
|
define i32 @test14a(i32 %A) {
|
|
; CHECK: @test14a
|
|
; CHECK-NEXT: and i32 %A, 77
|
|
; CHECK-NEXT: ret i32
|
|
%B = shl i32 %A, 4 ; <i32> [#uses=1]
|
|
%C = and i32 %B, 1234 ; <i32> [#uses=1]
|
|
%D = lshr i32 %C, 4 ; <i32> [#uses=1]
|
|
ret i32 %D
|
|
}
|
|
|
|
define i32 @test15(i1 %C) {
|
|
; CHECK: @test15
|
|
; CHECK-NEXT: select i1 %C, i32 12, i32 4
|
|
; CHECK-NEXT: ret i32
|
|
%A = select i1 %C, i32 3, i32 1 ; <i32> [#uses=1]
|
|
%V = shl i32 %A, 2 ; <i32> [#uses=1]
|
|
ret i32 %V
|
|
}
|
|
|
|
define i32 @test15a(i1 %C) {
|
|
; CHECK: @test15a
|
|
; CHECK-NEXT: select i1 %C, i32 512, i32 128
|
|
; CHECK-NEXT: ret i32
|
|
%A = select i1 %C, i8 3, i8 1 ; <i8> [#uses=1]
|
|
%shift.upgrd.4 = zext i8 %A to i32 ; <i32> [#uses=1]
|
|
%V = shl i32 64, %shift.upgrd.4 ; <i32> [#uses=1]
|
|
ret i32 %V
|
|
}
|
|
|
|
define i1 @test16(i32 %X) {
|
|
; CHECK: @test16
|
|
; CHECK-NEXT: and i32 %X, 16
|
|
; CHECK-NEXT: icmp ne i32
|
|
; CHECK-NEXT: ret i1
|
|
%tmp.3 = ashr i32 %X, 4
|
|
%tmp.6 = and i32 %tmp.3, 1
|
|
%tmp.7 = icmp ne i32 %tmp.6, 0
|
|
ret i1 %tmp.7
|
|
}
|
|
|
|
define i1 @test17(i32 %A) {
|
|
; CHECK: @test17
|
|
; CHECK-NEXT: and i32 %A, -8
|
|
; CHECK-NEXT: icmp eq i32
|
|
; CHECK-NEXT: ret i1
|
|
%B = lshr i32 %A, 3 ; <i32> [#uses=1]
|
|
%C = icmp eq i32 %B, 1234 ; <i1> [#uses=1]
|
|
ret i1 %C
|
|
}
|
|
|
|
|
|
define i1 @test18(i8 %A) {
|
|
; CHECK: @test18
|
|
; CHECK: ret i1 false
|
|
|
|
%B = lshr i8 %A, 7 ; <i8> [#uses=1]
|
|
;; false
|
|
%C = icmp eq i8 %B, 123 ; <i1> [#uses=1]
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @test19(i32 %A) {
|
|
; CHECK: @test19
|
|
; CHECK-NEXT: icmp ult i32 %A, 4
|
|
; CHECK-NEXT: ret i1
|
|
%B = ashr i32 %A, 2 ; <i32> [#uses=1]
|
|
;; (X & -4) == 0
|
|
%C = icmp eq i32 %B, 0 ; <i1> [#uses=1]
|
|
ret i1 %C
|
|
}
|
|
|
|
|
|
define i1 @test19a(i32 %A) {
|
|
; CHECK: @test19a
|
|
; CHECK-NEXT: and i32 %A, -4
|
|
; CHECK-NEXT: icmp eq i32
|
|
; CHECK-NEXT: ret i1
|
|
%B = ashr i32 %A, 2 ; <i32> [#uses=1]
|
|
;; (X & -4) == -4
|
|
%C = icmp eq i32 %B, -1 ; <i1> [#uses=1]
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @test20(i8 %A) {
|
|
; CHECK: @test20
|
|
; CHECK: ret i1 false
|
|
%B = ashr i8 %A, 7 ; <i8> [#uses=1]
|
|
;; false
|
|
%C = icmp eq i8 %B, 123 ; <i1> [#uses=1]
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @test21(i8 %A) {
|
|
; CHECK: @test21
|
|
; CHECK-NEXT: and i8 %A, 15
|
|
; CHECK-NEXT: icmp eq i8
|
|
; CHECK-NEXT: ret i1
|
|
%B = shl i8 %A, 4 ; <i8> [#uses=1]
|
|
%C = icmp eq i8 %B, -128 ; <i1> [#uses=1]
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @test22(i8 %A) {
|
|
; CHECK: @test22
|
|
; CHECK-NEXT: and i8 %A, 15
|
|
; CHECK-NEXT: icmp eq i8
|
|
; CHECK-NEXT: ret i1
|
|
%B = shl i8 %A, 4 ; <i8> [#uses=1]
|
|
%C = icmp eq i8 %B, 0 ; <i1> [#uses=1]
|
|
ret i1 %C
|
|
}
|
|
|
|
define i8 @test23(i32 %A) {
|
|
; CHECK: @test23
|
|
; CHECK-NEXT: trunc i32 %A to i8
|
|
; CHECK-NEXT: ret i8
|
|
|
|
;; casts not needed
|
|
%B = shl i32 %A, 24 ; <i32> [#uses=1]
|
|
%C = ashr i32 %B, 24 ; <i32> [#uses=1]
|
|
%D = trunc i32 %C to i8 ; <i8> [#uses=1]
|
|
ret i8 %D
|
|
}
|
|
|
|
define i8 @test24(i8 %X) {
|
|
; CHECK: @test24
|
|
; CHECK-NEXT: and i8 %X, 3
|
|
; CHECK-NEXT: ret i8
|
|
%Y = and i8 %X, -5 ; <i8> [#uses=1]
|
|
%Z = shl i8 %Y, 5 ; <i8> [#uses=1]
|
|
%Q = ashr i8 %Z, 5 ; <i8> [#uses=1]
|
|
ret i8 %Q
|
|
}
|
|
|
|
define i32 @test25(i32 %tmp.2, i32 %AA) {
|
|
; CHECK: @test25
|
|
; CHECK-NEXT: and i32 %tmp.2, -131072
|
|
; CHECK-NEXT: add i32 %{{[^,]*}}, %AA
|
|
; CHECK-NEXT: and i32 %{{[^,]*}}, -131072
|
|
; CHECK-NEXT: ret i32
|
|
%x = lshr i32 %AA, 17 ; <i32> [#uses=1]
|
|
%tmp.3 = lshr i32 %tmp.2, 17 ; <i32> [#uses=1]
|
|
%tmp.5 = add i32 %tmp.3, %x ; <i32> [#uses=1]
|
|
%tmp.6 = shl i32 %tmp.5, 17 ; <i32> [#uses=1]
|
|
ret i32 %tmp.6
|
|
}
|
|
|
|
;; handle casts between shifts.
|
|
define i32 @test26(i32 %A) {
|
|
; CHECK: @test26
|
|
; CHECK-NEXT: and i32 %A, -2
|
|
; CHECK-NEXT: ret i32
|
|
%B = lshr i32 %A, 1 ; <i32> [#uses=1]
|
|
%C = bitcast i32 %B to i32 ; <i32> [#uses=1]
|
|
%D = shl i32 %C, 1 ; <i32> [#uses=1]
|
|
ret i32 %D
|
|
}
|
|
|
|
|
|
define i1 @test27(i32 %x) nounwind {
|
|
; CHECK: @test27
|
|
; CHECK-NEXT: and i32 %x, 8
|
|
; CHECK-NEXT: icmp ne i32
|
|
; CHECK-NEXT: ret i1
|
|
%y = lshr i32 %x, 3
|
|
%z = trunc i32 %y to i1
|
|
ret i1 %z
|
|
}
|
|
|
|
define i8 @test28(i8 %x) {
|
|
entry:
|
|
; CHECK: @test28
|
|
; CHECK: icmp slt i8 %x, 0
|
|
; CHECK-NEXT: br i1
|
|
%tmp1 = lshr i8 %x, 7
|
|
%cond1 = icmp ne i8 %tmp1, 0
|
|
br i1 %cond1, label %bb1, label %bb2
|
|
|
|
bb1:
|
|
ret i8 0
|
|
|
|
bb2:
|
|
ret i8 1
|
|
}
|
|
|
|
define i8 @test28a(i8 %x, i8 %y) {
|
|
entry:
|
|
; This shouldn't be transformed.
|
|
; CHECK: @test28a
|
|
; CHECK: %tmp1 = lshr i8 %x, 7
|
|
; CHECK: %cond1 = icmp eq i8 %tmp1, 0
|
|
; CHECK: br i1 %cond1, label %bb2, label %bb1
|
|
%tmp1 = lshr i8 %x, 7
|
|
%cond1 = icmp ne i8 %tmp1, 0
|
|
br i1 %cond1, label %bb1, label %bb2
|
|
bb1:
|
|
ret i8 %tmp1
|
|
bb2:
|
|
%tmp2 = add i8 %tmp1, %y
|
|
ret i8 %tmp2
|
|
}
|
|
|
|
|
|
define i32 @test29(i64 %d18) {
|
|
entry:
|
|
%tmp916 = lshr i64 %d18, 32
|
|
%tmp917 = trunc i64 %tmp916 to i32
|
|
%tmp10 = lshr i32 %tmp917, 31
|
|
ret i32 %tmp10
|
|
; CHECK: @test29
|
|
; CHECK: %tmp916 = lshr i64 %d18, 63
|
|
; CHECK: %tmp10 = trunc i64 %tmp916 to i32
|
|
}
|
|
|
|
|
|
define i32 @test30(i32 %A, i32 %B, i32 %C) {
|
|
%X = shl i32 %A, %C
|
|
%Y = shl i32 %B, %C
|
|
%Z = and i32 %X, %Y
|
|
ret i32 %Z
|
|
; CHECK: @test30
|
|
; CHECK: %X1 = and i32 %A, %B
|
|
; CHECK: %Z = shl i32 %X1, %C
|
|
}
|
|
|
|
define i32 @test31(i32 %A, i32 %B, i32 %C) {
|
|
%X = lshr i32 %A, %C
|
|
%Y = lshr i32 %B, %C
|
|
%Z = or i32 %X, %Y
|
|
ret i32 %Z
|
|
; CHECK: @test31
|
|
; CHECK: %X1 = or i32 %A, %B
|
|
; CHECK: %Z = lshr i32 %X1, %C
|
|
}
|
|
|
|
define i32 @test32(i32 %A, i32 %B, i32 %C) {
|
|
%X = ashr i32 %A, %C
|
|
%Y = ashr i32 %B, %C
|
|
%Z = xor i32 %X, %Y
|
|
ret i32 %Z
|
|
; CHECK: @test32
|
|
; CHECK: %X1 = xor i32 %A, %B
|
|
; CHECK: %Z = ashr i32 %X1, %C
|
|
; CHECK: ret i32 %Z
|
|
}
|
|
|
|
define i1 @test33(i32 %X) {
|
|
%tmp1 = shl i32 %X, 7
|
|
%tmp2 = icmp slt i32 %tmp1, 0
|
|
ret i1 %tmp2
|
|
; CHECK: @test33
|
|
; CHECK: %tmp1.mask = and i32 %X, 16777216
|
|
; CHECK: %tmp2 = icmp ne i32 %tmp1.mask, 0
|
|
}
|
|
|
|
define i1 @test34(i32 %X) {
|
|
%tmp1 = lshr i32 %X, 7
|
|
%tmp2 = icmp slt i32 %tmp1, 0
|
|
ret i1 %tmp2
|
|
; CHECK: @test34
|
|
; CHECK: ret i1 false
|
|
}
|
|
|
|
define i1 @test35(i32 %X) {
|
|
%tmp1 = ashr i32 %X, 7
|
|
%tmp2 = icmp slt i32 %tmp1, 0
|
|
ret i1 %tmp2
|
|
; CHECK: @test35
|
|
; CHECK: %tmp2 = icmp slt i32 %X, 0
|
|
; CHECK: ret i1 %tmp2
|
|
}
|
|
|
|
define i128 @test36(i128 %A, i128 %B) {
|
|
entry:
|
|
%tmp27 = shl i128 %A, 64
|
|
%tmp23 = shl i128 %B, 64
|
|
%ins = or i128 %tmp23, %tmp27
|
|
%tmp45 = lshr i128 %ins, 64
|
|
ret i128 %tmp45
|
|
|
|
; CHECK: @test36
|
|
; CHECK: %tmp231 = or i128 %B, %A
|
|
; CHECK: %ins = and i128 %tmp231, 18446744073709551615
|
|
; CHECK: ret i128 %ins
|
|
}
|
|
|
|
define i64 @test37(i128 %A, i32 %B) {
|
|
entry:
|
|
%tmp27 = shl i128 %A, 64
|
|
%tmp22 = zext i32 %B to i128
|
|
%tmp23 = shl i128 %tmp22, 96
|
|
%ins = or i128 %tmp23, %tmp27
|
|
%tmp45 = lshr i128 %ins, 64
|
|
%tmp46 = trunc i128 %tmp45 to i64
|
|
ret i64 %tmp46
|
|
|
|
; CHECK: @test37
|
|
; CHECK: %tmp23 = shl nuw nsw i128 %tmp22, 32
|
|
; CHECK: %ins = or i128 %tmp23, %A
|
|
; CHECK: %tmp46 = trunc i128 %ins to i64
|
|
}
|
|
|
|
define i32 @test38(i32 %x) nounwind readnone {
|
|
%rem = srem i32 %x, 32
|
|
%shl = shl i32 1, %rem
|
|
ret i32 %shl
|
|
; CHECK: @test38
|
|
; CHECK-NEXT: and i32 %x, 31
|
|
; CHECK-NEXT: shl i32 1
|
|
; CHECK-NEXT: ret i32
|
|
}
|
|
|
|
; <rdar://problem/8756731>
|
|
; CHECK: @test39
|
|
define i8 @test39(i32 %a0) {
|
|
entry:
|
|
%tmp4 = trunc i32 %a0 to i8
|
|
; CHECK: and i8 %tmp49, 64
|
|
%tmp5 = shl i8 %tmp4, 5
|
|
%tmp48 = and i8 %tmp5, 32
|
|
%tmp49 = lshr i8 %tmp48, 5
|
|
%tmp50 = mul i8 %tmp49, 64
|
|
%tmp51 = xor i8 %tmp50, %tmp5
|
|
%tmp52 = and i8 %tmp51, -128
|
|
%tmp53 = lshr i8 %tmp52, 7
|
|
%tmp54 = mul i8 %tmp53, 16
|
|
; CHECK: %0 = shl i8 %tmp4, 2
|
|
; CHECK: %tmp54 = and i8 %0, 16
|
|
%tmp55 = xor i8 %tmp54, %tmp51
|
|
; CHECK: ret i8 %tmp551
|
|
ret i8 %tmp55
|
|
}
|
|
|
|
; PR9809
|
|
define i32 @test40(i32 %a, i32 %b) nounwind {
|
|
%shl1 = shl i32 1, %b
|
|
%shl2 = shl i32 %shl1, 2
|
|
%div = udiv i32 %a, %shl2
|
|
ret i32 %div
|
|
; CHECK: @test40
|
|
; CHECK-NEXT: add i32 %b, 2
|
|
; CHECK-NEXT: lshr i32 %a
|
|
; CHECK-NEXT: ret i32
|
|
}
|
|
|
|
define i32 @test41(i32 %a, i32 %b) nounwind {
|
|
%1 = shl i32 1, %b
|
|
%2 = shl i32 %1, 3
|
|
ret i32 %2
|
|
; CHECK: @test41
|
|
; CHECK-NEXT: shl i32 8, %b
|
|
; CHECK-NEXT: ret i32
|
|
}
|
|
|
|
define i32 @test42(i32 %a, i32 %b) nounwind {
|
|
%div = lshr i32 4096, %b ; must be exact otherwise we'd divide by zero
|
|
%div2 = udiv i32 %a, %div
|
|
ret i32 %div2
|
|
; CHECK: @test42
|
|
; CHECK-NEXT: lshr exact i32 4096, %b
|
|
}
|
|
|
|
define i32 @test43(i32 %a, i32 %b) nounwind {
|
|
%div = shl i32 4096, %b ; must be exact otherwise we'd divide by zero
|
|
%div2 = udiv i32 %a, %div
|
|
ret i32 %div2
|
|
; CHECK: @test43
|
|
; CHECK-NEXT: add i32 %b, 12
|
|
; CHECK-NEXT: lshr
|
|
; CHECK-NEXT: ret
|
|
}
|
|
|
|
define i32 @test44(i32 %a) nounwind {
|
|
%y = shl nuw i32 %a, 1
|
|
%z = shl i32 %y, 4
|
|
ret i32 %z
|
|
; CHECK: @test44
|
|
; CHECK-NEXT: %y = shl i32 %a, 5
|
|
; CHECK-NEXT: ret i32 %y
|
|
}
|
|
|
|
define i32 @test45(i32 %a) nounwind {
|
|
%y = lshr exact i32 %a, 1
|
|
%z = lshr i32 %y, 4
|
|
ret i32 %z
|
|
; CHECK: @test45
|
|
; CHECK-NEXT: %y = lshr i32 %a, 5
|
|
; CHECK-NEXT: ret i32 %y
|
|
}
|
|
|
|
define i32 @test46(i32 %a) {
|
|
%y = ashr exact i32 %a, 3
|
|
%z = shl i32 %y, 1
|
|
ret i32 %z
|
|
; CHECK: @test46
|
|
; CHECK-NEXT: %z = ashr exact i32 %a, 2
|
|
; CHECK-NEXT: ret i32 %z
|
|
}
|
|
|
|
define i32 @test47(i32 %a) {
|
|
%y = lshr exact i32 %a, 3
|
|
%z = shl i32 %y, 1
|
|
ret i32 %z
|
|
; CHECK: @test47
|
|
; CHECK-NEXT: %z = lshr exact i32 %a, 2
|
|
; CHECK-NEXT: ret i32 %z
|
|
}
|
|
|
|
define i32 @test48(i32 %x) {
|
|
%A = lshr exact i32 %x, 1
|
|
%B = shl i32 %A, 3
|
|
ret i32 %B
|
|
; CHECK: @test48
|
|
; CHECK-NEXT: %B = shl i32 %x, 2
|
|
; CHECK-NEXT: ret i32 %B
|
|
}
|
|
|
|
define i32 @test49(i32 %x) {
|
|
%A = ashr exact i32 %x, 1
|
|
%B = shl i32 %A, 3
|
|
ret i32 %B
|
|
; CHECK: @test49
|
|
; CHECK-NEXT: %B = shl i32 %x, 2
|
|
; CHECK-NEXT: ret i32 %B
|
|
}
|
|
|
|
define i32 @test50(i32 %x) {
|
|
%A = shl nsw i32 %x, 1
|
|
%B = ashr i32 %A, 3
|
|
ret i32 %B
|
|
; CHECK: @test50
|
|
; CHECK-NEXT: %B = ashr i32 %x, 2
|
|
; CHECK-NEXT: ret i32 %B
|
|
}
|
|
|
|
define i32 @test51(i32 %x) {
|
|
%A = shl nuw i32 %x, 1
|
|
%B = lshr i32 %A, 3
|
|
ret i32 %B
|
|
; CHECK: @test51
|
|
; CHECK-NEXT: %B = lshr i32 %x, 2
|
|
; CHECK-NEXT: ret i32 %B
|
|
}
|
|
|
|
define i32 @test52(i32 %x) {
|
|
%A = shl nsw i32 %x, 3
|
|
%B = ashr i32 %A, 1
|
|
ret i32 %B
|
|
; CHECK: @test52
|
|
; CHECK-NEXT: %B = shl nsw i32 %x, 2
|
|
; CHECK-NEXT: ret i32 %B
|
|
}
|
|
|
|
define i32 @test53(i32 %x) {
|
|
%A = shl nuw i32 %x, 3
|
|
%B = lshr i32 %A, 1
|
|
ret i32 %B
|
|
; CHECK: @test53
|
|
; CHECK-NEXT: %B = shl nuw i32 %x, 2
|
|
; CHECK-NEXT: ret i32 %B
|
|
}
|
|
|
|
define i32 @test54(i32 %x) {
|
|
%shr2 = lshr i32 %x, 1
|
|
%shl = shl i32 %shr2, 4
|
|
%and = and i32 %shl, 16
|
|
ret i32 %and
|
|
; CHECK: @test54
|
|
; CHECK: shl i32 %x, 3
|
|
}
|
|
|
|
|
|
define i32 @test55(i32 %x) {
|
|
%shr2 = lshr i32 %x, 1
|
|
%shl = shl i32 %shr2, 4
|
|
%or = or i32 %shl, 8
|
|
ret i32 %or
|
|
; CHECK: @test55
|
|
; CHECK: shl i32 %x, 3
|
|
}
|
|
|
|
define i32 @test56(i32 %x) {
|
|
%shr2 = lshr i32 %x, 1
|
|
%shl = shl i32 %shr2, 4
|
|
%or = or i32 %shl, 7
|
|
ret i32 %or
|
|
; CHECK: @test56
|
|
; CHECK: shl i32 %shr2, 4
|
|
}
|
|
|
|
|
|
define i32 @test57(i32 %x) {
|
|
%shr = lshr i32 %x, 1
|
|
%shl = shl i32 %shr, 4
|
|
%and = and i32 %shl, 16
|
|
ret i32 %and
|
|
; CHECK: @test57
|
|
; CHECK: shl i32 %x, 3
|
|
}
|
|
|
|
define i32 @test58(i32 %x) {
|
|
%shr = lshr i32 %x, 1
|
|
%shl = shl i32 %shr, 4
|
|
%or = or i32 %shl, 8
|
|
ret i32 %or
|
|
; CHECK: @test58
|
|
; CHECK: shl i32 %x, 3
|
|
}
|
|
|
|
define i32 @test59(i32 %x) {
|
|
%shr = ashr i32 %x, 1
|
|
%shl = shl i32 %shr, 4
|
|
%or = or i32 %shl, 7
|
|
ret i32 %or
|
|
; CHECK: @test59
|
|
; CHECK: %shl = shl i32 %shr1, 4
|
|
}
|
|
|
|
|
|
define i32 @test60(i32 %x) {
|
|
%shr = ashr i32 %x, 4
|
|
%shl = shl i32 %shr, 1
|
|
%or = or i32 %shl, 1
|
|
ret i32 %or
|
|
; CHECK: @test60
|
|
; CHECK: ashr i32 %x, 3
|
|
}
|
|
|
|
|
|
define i32 @test61(i32 %x) {
|
|
%shr = ashr i32 %x, 4
|
|
%shl = shl i32 %shr, 1
|
|
%or = or i32 %shl, 2
|
|
ret i32 %or
|
|
; CHECK: @test61
|
|
; CHECK: ashr i32 %x, 4
|
|
}
|
|
|
|
; propagate "exact" trait
|
|
define i32 @test62(i32 %x) {
|
|
%shr = ashr exact i32 %x, 4
|
|
%shl = shl i32 %shr, 1
|
|
%or = or i32 %shl, 1
|
|
ret i32 %or
|
|
; CHECK: @test62
|
|
; CHECK: ashr exact i32 %x, 3
|
|
}
|