forked from OSchip/llvm-project
[NFC][InstCombine] Some more tests for comparisons with low-bit-mask.
https://bugs.llvm.org/show_bug.cgi?id=38123 https://bugs.llvm.org/show_bug.cgi?id=38708 llvm-svn: 342343
This commit is contained in:
Roman Lebedev
parent
3e0a54e9da
commit
3fb9414d02
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@ -0,0 +1,316 @@
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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; https://bugs.llvm.org/show_bug.cgi?id=38123
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; Pattern:
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; x & ~(-1 << y) == x
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; Should be transformed into:
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; x u<= ~(-1 << y)
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; That is then later transformed into:
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; (x >> y) == 0
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; ============================================================================ ;
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; Basic positive tests
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; ============================================================================ ;
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define i1 @p0(i8 %x, i8 %y) {
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; CHECK-LABEL: @p0(
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; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
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; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
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; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
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; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[T2]], [[X]]
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; CHECK-NEXT: ret i1 [[RET]]
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;
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%t0 = shl i8 -1, %y
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%t1 = xor i8 %t0, -1
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%t2 = and i8 %t1, %x
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%ret = icmp eq i8 %t2, %x
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ret i1 %ret
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}
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; ============================================================================ ;
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; Vector tests
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; ============================================================================ ;
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define <2 x i1> @p1_vec(<2 x i8> %x, <2 x i8> %y) {
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; CHECK-LABEL: @p1_vec(
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; CHECK-NEXT: [[T0:%.*]] = shl <2 x i8> <i8 -1, i8 -1>, [[Y:%.*]]
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; CHECK-NEXT: [[T1:%.*]] = xor <2 x i8> [[T0]], <i8 -1, i8 -1>
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; CHECK-NEXT: [[T2:%.*]] = and <2 x i8> [[T1]], [[X:%.*]]
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; CHECK-NEXT: [[RET:%.*]] = icmp eq <2 x i8> [[T2]], [[X]]
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; CHECK-NEXT: ret <2 x i1> [[RET]]
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;
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%t0 = shl <2 x i8> <i8 -1, i8 -1>, %y
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%t1 = xor <2 x i8> %t0, <i8 -1, i8 -1>
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%t2 = and <2 x i8> %t1, %x
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%ret = icmp eq <2 x i8> %t2, %x
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ret <2 x i1> %ret
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}
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define <3 x i1> @p2_vec_undef0(<3 x i8> %x, <3 x i8> %y) {
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; CHECK-LABEL: @p2_vec_undef0(
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; CHECK-NEXT: [[T0:%.*]] = shl <3 x i8> <i8 -1, i8 undef, i8 -1>, [[Y:%.*]]
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; CHECK-NEXT: [[T1:%.*]] = xor <3 x i8> [[T0]], <i8 -1, i8 -1, i8 -1>
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; CHECK-NEXT: [[T2:%.*]] = and <3 x i8> [[T1]], [[X:%.*]]
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; CHECK-NEXT: [[RET:%.*]] = icmp eq <3 x i8> [[T2]], [[X]]
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; CHECK-NEXT: ret <3 x i1> [[RET]]
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;
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%t0 = shl <3 x i8> <i8 -1, i8 undef, i8 -1>, %y
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%t1 = xor <3 x i8> %t0, <i8 -1, i8 -1, i8 -1>
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%t2 = and <3 x i8> %t1, %x
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%ret = icmp eq <3 x i8> %t2, %x
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ret <3 x i1> %ret
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}
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define <3 x i1> @p3_vec_undef0(<3 x i8> %x, <3 x i8> %y) {
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; CHECK-LABEL: @p3_vec_undef0(
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; CHECK-NEXT: [[T0:%.*]] = shl <3 x i8> <i8 -1, i8 -1, i8 -1>, [[Y:%.*]]
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; CHECK-NEXT: [[T1:%.*]] = xor <3 x i8> [[T0]], <i8 -1, i8 undef, i8 -1>
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; CHECK-NEXT: [[T2:%.*]] = and <3 x i8> [[T1]], [[X:%.*]]
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; CHECK-NEXT: [[RET:%.*]] = icmp eq <3 x i8> [[T2]], [[X]]
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; CHECK-NEXT: ret <3 x i1> [[RET]]
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;
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%t0 = shl <3 x i8> <i8 -1, i8 -1, i8 -1>, %y
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%t1 = xor <3 x i8> %t0, <i8 -1, i8 undef, i8 -1>
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%t2 = and <3 x i8> %t1, %x
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%ret = icmp eq <3 x i8> %t2, %x
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ret <3 x i1> %ret
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}
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define <3 x i1> @p4_vec_undef2(<3 x i8> %x, <3 x i8> %y) {
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; CHECK-LABEL: @p4_vec_undef2(
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; CHECK-NEXT: [[T0:%.*]] = shl <3 x i8> <i8 -1, i8 undef, i8 -1>, [[Y:%.*]]
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; CHECK-NEXT: [[T1:%.*]] = xor <3 x i8> [[T0]], <i8 -1, i8 undef, i8 -1>
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; CHECK-NEXT: [[T2:%.*]] = and <3 x i8> [[T1]], [[X:%.*]]
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; CHECK-NEXT: [[RET:%.*]] = icmp eq <3 x i8> [[T2]], [[X]]
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; CHECK-NEXT: ret <3 x i1> [[RET]]
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;
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%t0 = shl <3 x i8> <i8 -1, i8 undef, i8 -1>, %y
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%t1 = xor <3 x i8> %t0, <i8 -1, i8 undef, i8 -1>
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%t2 = and <3 x i8> %t1, %x
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%ret = icmp eq <3 x i8> %t2, %x
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ret <3 x i1> %ret
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}
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; ============================================================================ ;
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; Commutativity tests.
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; ============================================================================ ;
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declare i8 @gen8()
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define i1 @c0(i8 %y) {
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; CHECK-LABEL: @c0(
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; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
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; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
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; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
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; CHECK-NEXT: [[T2:%.*]] = and i8 [[X]], [[T1]]
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; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[T2]], [[X]]
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; CHECK-NEXT: ret i1 [[RET]]
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;
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%t0 = shl i8 -1, %y
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%t1 = xor i8 %t0, -1
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%x = call i8 @gen8()
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%t2 = and i8 %x, %t1 ; swapped order
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%ret = icmp eq i8 %t2, %x
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ret i1 %ret
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}
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define i1 @c1(i8 %y) {
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; CHECK-LABEL: @c1(
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; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
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; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
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; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
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; CHECK-NEXT: [[T2:%.*]] = and i8 [[X]], [[T1]]
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; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[X]], [[T2]]
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; CHECK-NEXT: ret i1 [[RET]]
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;
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%t0 = shl i8 -1, %y
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%t1 = xor i8 %t0, -1
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%x = call i8 @gen8()
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%t2 = and i8 %t1, %x
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%ret = icmp eq i8 %x, %t2 ; swapped order
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ret i1 %ret
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}
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define i1 @c2(i8 %y) {
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; CHECK-LABEL: @c2(
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; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
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; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
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; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
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; CHECK-NEXT: [[T2:%.*]] = and i8 [[X]], [[T1]]
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; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[X]], [[T2]]
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; CHECK-NEXT: ret i1 [[RET]]
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;
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%t0 = shl i8 -1, %y
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%t1 = xor i8 %t0, -1
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%x = call i8 @gen8()
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%t2 = and i8 %x, %t1 ; swapped order
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%ret = icmp eq i8 %x, %t2 ; swapped order
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ret i1 %ret
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}
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; ============================================================================ ;
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; One-use tests. We don't care about multi-uses here.
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; ============================================================================ ;
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declare void @use8(i8)
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define i1 @oneuse0(i8 %x, i8 %y) {
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; CHECK-LABEL: @oneuse0(
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; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[T0]])
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; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
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; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
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; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[T2]], [[X]]
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; CHECK-NEXT: ret i1 [[RET]]
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;
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%t0 = shl i8 -1, %y
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call void @use8(i8 %t0)
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%t1 = xor i8 %t0, -1
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%t2 = and i8 %t1, %x
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%ret = icmp eq i8 %t2, %x
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ret i1 %ret
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}
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define i1 @oneuse1(i8 %x, i8 %y) {
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; CHECK-LABEL: @oneuse1(
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; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
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; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
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; CHECK-NEXT: call void @use8(i8 [[T1]])
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; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
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; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[T2]], [[X]]
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; CHECK-NEXT: ret i1 [[RET]]
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;
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%t0 = shl i8 -1, %y
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%t1 = xor i8 %t0, -1
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call void @use8(i8 %t1)
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%t2 = and i8 %t1, %x
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%ret = icmp eq i8 %t2, %x
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ret i1 %ret
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}
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define i1 @oneuse2(i8 %x, i8 %y) {
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; CHECK-LABEL: @oneuse2(
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; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
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; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
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; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[T2]])
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; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[T2]], [[X]]
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; CHECK-NEXT: ret i1 [[RET]]
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;
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%t0 = shl i8 -1, %y
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%t1 = xor i8 %t0, -1
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%t2 = and i8 %t1, %x
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call void @use8(i8 %t2)
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%ret = icmp eq i8 %t2, %x
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ret i1 %ret
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}
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define i1 @oneuse3(i8 %x, i8 %y) {
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; CHECK-LABEL: @oneuse3(
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; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[T0]])
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; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
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; CHECK-NEXT: call void @use8(i8 [[T1]])
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; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
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; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[T2]], [[X]]
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; CHECK-NEXT: ret i1 [[RET]]
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;
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%t0 = shl i8 -1, %y
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call void @use8(i8 %t0)
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%t1 = xor i8 %t0, -1
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call void @use8(i8 %t1)
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%t2 = and i8 %t1, %x
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%ret = icmp eq i8 %t2, %x
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ret i1 %ret
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}
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define i1 @oneuse4(i8 %x, i8 %y) {
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; CHECK-LABEL: @oneuse4(
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; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[T0]])
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; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
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; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[T2]])
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; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[T2]], [[X]]
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; CHECK-NEXT: ret i1 [[RET]]
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;
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%t0 = shl i8 -1, %y
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call void @use8(i8 %t0)
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%t1 = xor i8 %t0, -1
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%t2 = and i8 %t1, %x
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call void @use8(i8 %t2)
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%ret = icmp eq i8 %t2, %x
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ret i1 %ret
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}
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define i1 @oneuse5(i8 %x, i8 %y) {
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; CHECK-LABEL: @oneuse5(
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; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[T0]])
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; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
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; CHECK-NEXT: call void @use8(i8 [[T1]])
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; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[T2]])
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; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[T2]], [[X]]
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; CHECK-NEXT: ret i1 [[RET]]
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;
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%t0 = shl i8 -1, %y
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call void @use8(i8 %t0)
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%t1 = xor i8 %t0, -1
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call void @use8(i8 %t1)
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%t2 = and i8 %t1, %x
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call void @use8(i8 %t2)
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%ret = icmp eq i8 %t2, %x
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ret i1 %ret
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}
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; ============================================================================ ;
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; Negative tests
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; ============================================================================ ;
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define i1 @n0(i8 %x, i8 %y, i8 %notx) {
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; CHECK-LABEL: @n0(
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; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
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; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
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; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
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; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[T2]], [[NOTX:%.*]]
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; CHECK-NEXT: ret i1 [[RET]]
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;
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%t0 = shl i8 -1, %y
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%t1 = xor i8 %t0, -1
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%t2 = and i8 %t1, %x
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%ret = icmp eq i8 %t2, %notx ; not %x
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ret i1 %ret
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}
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define i1 @n1(i8 %x, i8 %y) {
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; CHECK-LABEL: @n1(
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; CHECK-NEXT: [[T0:%.*]] = shl i8 1, [[Y:%.*]]
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; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
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; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
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; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[T2]], [[X]]
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; CHECK-NEXT: ret i1 [[RET]]
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;
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%t0 = shl i8 1, %y ; not -1
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%t1 = xor i8 %t0, -1
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%t2 = and i8 %t1, %x
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%ret = icmp eq i8 %t2, %x
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ret i1 %ret
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}
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define i1 @n2(i8 %x, i8 %y) {
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; CHECK-LABEL: @n2(
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; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
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; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], 1
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; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
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; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[T2]], [[X]]
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; CHECK-NEXT: ret i1 [[RET]]
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;
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%t0 = shl i8 -1, %y
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%t1 = xor i8 %t0, 1 ; not -1
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%t2 = and i8 %t1, %x
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%ret = icmp eq i8 %t2, %x
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ret i1 %ret
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}
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@ -0,0 +1,316 @@
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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; https://bugs.llvm.org/show_bug.cgi?id=38123
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; Pattern:
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; x & ~(-1 << y) != x
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; Should be transformed into:
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; x u> ~(-1 << y)
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; That is then later transformed into:
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; (x >> y) != 0
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; ============================================================================ ;
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; Basic positive tests
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; ============================================================================ ;
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define i1 @p0(i8 %x, i8 %y) {
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; CHECK-LABEL: @p0(
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; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
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; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
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; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
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; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[T2]], [[X]]
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; CHECK-NEXT: ret i1 [[RET]]
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;
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%t0 = shl i8 -1, %y
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%t1 = xor i8 %t0, -1
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%t2 = and i8 %t1, %x
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%ret = icmp ne i8 %t2, %x
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ret i1 %ret
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}
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; ============================================================================ ;
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; Vector tests
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; ============================================================================ ;
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define <2 x i1> @p1_vec(<2 x i8> %x, <2 x i8> %y) {
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; CHECK-LABEL: @p1_vec(
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; CHECK-NEXT: [[T0:%.*]] = shl <2 x i8> <i8 -1, i8 -1>, [[Y:%.*]]
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; CHECK-NEXT: [[T1:%.*]] = xor <2 x i8> [[T0]], <i8 -1, i8 -1>
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; CHECK-NEXT: [[T2:%.*]] = and <2 x i8> [[T1]], [[X:%.*]]
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; CHECK-NEXT: [[RET:%.*]] = icmp ne <2 x i8> [[T2]], [[X]]
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; CHECK-NEXT: ret <2 x i1> [[RET]]
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;
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%t0 = shl <2 x i8> <i8 -1, i8 -1>, %y
|
||||
%t1 = xor <2 x i8> %t0, <i8 -1, i8 -1>
|
||||
%t2 = and <2 x i8> %t1, %x
|
||||
%ret = icmp ne <2 x i8> %t2, %x
|
||||
ret <2 x i1> %ret
|
||||
}
|
||||
|
||||
define <3 x i1> @p2_vec_undef0(<3 x i8> %x, <3 x i8> %y) {
|
||||
; CHECK-LABEL: @p2_vec_undef0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl <3 x i8> <i8 -1, i8 undef, i8 -1>, [[Y:%.*]]
|
||||
; CHECK-NEXT: [[T1:%.*]] = xor <3 x i8> [[T0]], <i8 -1, i8 -1, i8 -1>
|
||||
; CHECK-NEXT: [[T2:%.*]] = and <3 x i8> [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne <3 x i8> [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret <3 x i1> [[RET]]
|
||||
;
|
||||
%t0 = shl <3 x i8> <i8 -1, i8 undef, i8 -1>, %y
|
||||
%t1 = xor <3 x i8> %t0, <i8 -1, i8 -1, i8 -1>
|
||||
%t2 = and <3 x i8> %t1, %x
|
||||
%ret = icmp ne <3 x i8> %t2, %x
|
||||
ret <3 x i1> %ret
|
||||
}
|
||||
|
||||
define <3 x i1> @p3_vec_undef0(<3 x i8> %x, <3 x i8> %y) {
|
||||
; CHECK-LABEL: @p3_vec_undef0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl <3 x i8> <i8 -1, i8 -1, i8 -1>, [[Y:%.*]]
|
||||
; CHECK-NEXT: [[T1:%.*]] = xor <3 x i8> [[T0]], <i8 -1, i8 undef, i8 -1>
|
||||
; CHECK-NEXT: [[T2:%.*]] = and <3 x i8> [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne <3 x i8> [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret <3 x i1> [[RET]]
|
||||
;
|
||||
%t0 = shl <3 x i8> <i8 -1, i8 -1, i8 -1>, %y
|
||||
%t1 = xor <3 x i8> %t0, <i8 -1, i8 undef, i8 -1>
|
||||
%t2 = and <3 x i8> %t1, %x
|
||||
%ret = icmp ne <3 x i8> %t2, %x
|
||||
ret <3 x i1> %ret
|
||||
}
|
||||
|
||||
define <3 x i1> @p4_vec_undef2(<3 x i8> %x, <3 x i8> %y) {
|
||||
; CHECK-LABEL: @p4_vec_undef2(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl <3 x i8> <i8 -1, i8 undef, i8 -1>, [[Y:%.*]]
|
||||
; CHECK-NEXT: [[T1:%.*]] = xor <3 x i8> [[T0]], <i8 -1, i8 undef, i8 -1>
|
||||
; CHECK-NEXT: [[T2:%.*]] = and <3 x i8> [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne <3 x i8> [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret <3 x i1> [[RET]]
|
||||
;
|
||||
%t0 = shl <3 x i8> <i8 -1, i8 undef, i8 -1>, %y
|
||||
%t1 = xor <3 x i8> %t0, <i8 -1, i8 undef, i8 -1>
|
||||
%t2 = and <3 x i8> %t1, %x
|
||||
%ret = icmp ne <3 x i8> %t2, %x
|
||||
ret <3 x i1> %ret
|
||||
}
|
||||
|
||||
; ============================================================================ ;
|
||||
; Commutativity tests.
|
||||
; ============================================================================ ;
|
||||
|
||||
declare i8 @gen8()
|
||||
|
||||
define i1 @c0(i8 %y) {
|
||||
; CHECK-LABEL: @c0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
|
||||
; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[X]], [[T1]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 -1, %y
|
||||
%t1 = xor i8 %t0, -1
|
||||
%x = call i8 @gen8()
|
||||
%t2 = and i8 %x, %t1 ; swapped order
|
||||
%ret = icmp ne i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @c1(i8 %y) {
|
||||
; CHECK-LABEL: @c1(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
|
||||
; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[X]], [[T1]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[X]], [[T2]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 -1, %y
|
||||
%t1 = xor i8 %t0, -1
|
||||
%x = call i8 @gen8()
|
||||
%t2 = and i8 %t1, %x
|
||||
%ret = icmp ne i8 %x, %t2 ; swapped order
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @c2(i8 %y) {
|
||||
; CHECK-LABEL: @c2(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
|
||||
; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[X]], [[T1]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[X]], [[T2]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 -1, %y
|
||||
%t1 = xor i8 %t0, -1
|
||||
%x = call i8 @gen8()
|
||||
%t2 = and i8 %x, %t1 ; swapped order
|
||||
%ret = icmp ne i8 %x, %t2 ; swapped order
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
; ============================================================================ ;
|
||||
; One-use tests. We don't care about multi-uses here.
|
||||
; ============================================================================ ;
|
||||
|
||||
declare void @use8(i8)
|
||||
|
||||
define i1 @oneuse0(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @oneuse0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 -1, %y
|
||||
call void @use8(i8 %t0)
|
||||
%t1 = xor i8 %t0, -1
|
||||
%t2 = and i8 %t1, %x
|
||||
%ret = icmp ne i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @oneuse1(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @oneuse1(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
|
||||
; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
|
||||
; CHECK-NEXT: call void @use8(i8 [[T1]])
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 -1, %y
|
||||
%t1 = xor i8 %t0, -1
|
||||
call void @use8(i8 %t1)
|
||||
%t2 = and i8 %t1, %x
|
||||
%ret = icmp ne i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @oneuse2(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @oneuse2(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
|
||||
; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T2]])
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 -1, %y
|
||||
%t1 = xor i8 %t0, -1
|
||||
%t2 = and i8 %t1, %x
|
||||
call void @use8(i8 %t2)
|
||||
%ret = icmp ne i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @oneuse3(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @oneuse3(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
|
||||
; CHECK-NEXT: call void @use8(i8 [[T1]])
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 -1, %y
|
||||
call void @use8(i8 %t0)
|
||||
%t1 = xor i8 %t0, -1
|
||||
call void @use8(i8 %t1)
|
||||
%t2 = and i8 %t1, %x
|
||||
%ret = icmp ne i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @oneuse4(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @oneuse4(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T2]])
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 -1, %y
|
||||
call void @use8(i8 %t0)
|
||||
%t1 = xor i8 %t0, -1
|
||||
%t2 = and i8 %t1, %x
|
||||
call void @use8(i8 %t2)
|
||||
%ret = icmp ne i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @oneuse5(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @oneuse5(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
|
||||
; CHECK-NEXT: call void @use8(i8 [[T1]])
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T2]])
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 -1, %y
|
||||
call void @use8(i8 %t0)
|
||||
%t1 = xor i8 %t0, -1
|
||||
call void @use8(i8 %t1)
|
||||
%t2 = and i8 %t1, %x
|
||||
call void @use8(i8 %t2)
|
||||
%ret = icmp ne i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
; ============================================================================ ;
|
||||
; Negative tests
|
||||
; ============================================================================ ;
|
||||
|
||||
define i1 @n0(i8 %x, i8 %y, i8 %notx) {
|
||||
; CHECK-LABEL: @n0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
|
||||
; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[T2]], [[NOTX:%.*]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 -1, %y
|
||||
%t1 = xor i8 %t0, -1
|
||||
%t2 = and i8 %t1, %x
|
||||
%ret = icmp ne i8 %t2, %notx ; not %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @n1(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n1(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 1, [[Y:%.*]]
|
||||
; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 1, %y ; not -1
|
||||
%t1 = xor i8 %t0, -1
|
||||
%t2 = and i8 %t1, %x
|
||||
%ret = icmp ne i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @n2(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n2(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
|
||||
; CHECK-NEXT: [[T1:%.*]] = xor i8 [[T0]], 1
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 -1, %y
|
||||
%t1 = xor i8 %t0, 1 ; not -1
|
||||
%t2 = and i8 %t1, %x
|
||||
%ret = icmp ne i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
|
@ -0,0 +1,291 @@
|
|||
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
||||
; RUN: opt < %s -instcombine -S | FileCheck %s
|
||||
|
||||
; https://bugs.llvm.org/show_bug.cgi?id=38123
|
||||
|
||||
; Pattern:
|
||||
; x & ((1 << y) + (-1)) == x
|
||||
; Should be transformed into:
|
||||
; x u<= ((1 << y) + (-1))
|
||||
; That is then later transformed into:
|
||||
; (x >> y) == 0
|
||||
|
||||
; This pattern is uncanonical, but we can not canonicalize it due to extra uses.
|
||||
|
||||
declare void @use8(i8)
|
||||
declare void @use2i8(<2 x i8>)
|
||||
declare void @use3i8(<3 x i8>)
|
||||
|
||||
; ============================================================================ ;
|
||||
; Basic positive tests
|
||||
; ============================================================================ ;
|
||||
|
||||
define i1 @p0(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @p0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 1, %y
|
||||
call void @use8(i8 %t0)
|
||||
%t1 = add i8 %t0, -1
|
||||
%t2 = and i8 %t1, %x
|
||||
%ret = icmp eq i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
; ============================================================================ ;
|
||||
; Vector tests
|
||||
; ============================================================================ ;
|
||||
|
||||
define <2 x i1> @p1_vec(<2 x i8> %x, <2 x i8> %y) {
|
||||
; CHECK-LABEL: @p1_vec(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl <2 x i8> <i8 1, i8 1>, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use2i8(<2 x i8> [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add <2 x i8> [[T0]], <i8 -1, i8 -1>
|
||||
; CHECK-NEXT: [[T2:%.*]] = and <2 x i8> [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp eq <2 x i8> [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret <2 x i1> [[RET]]
|
||||
;
|
||||
%t0 = shl <2 x i8> <i8 1, i8 1>, %y
|
||||
call void @use2i8(<2 x i8> %t0)
|
||||
%t1 = add <2 x i8> %t0, <i8 -1, i8 -1>
|
||||
%t2 = and <2 x i8> %t1, %x
|
||||
%ret = icmp eq <2 x i8> %t2, %x
|
||||
ret <2 x i1> %ret
|
||||
}
|
||||
|
||||
define <3 x i1> @p2_vec_undef0(<3 x i8> %x, <3 x i8> %y) {
|
||||
; CHECK-LABEL: @p2_vec_undef0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl <3 x i8> <i8 1, i8 undef, i8 1>, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use3i8(<3 x i8> [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add <3 x i8> [[T0]], <i8 -1, i8 -1, i8 -1>
|
||||
; CHECK-NEXT: [[T2:%.*]] = and <3 x i8> [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp eq <3 x i8> [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret <3 x i1> [[RET]]
|
||||
;
|
||||
%t0 = shl <3 x i8> <i8 1, i8 undef, i8 1>, %y
|
||||
call void @use3i8(<3 x i8> %t0)
|
||||
%t1 = add <3 x i8> %t0, <i8 -1, i8 -1, i8 -1>
|
||||
%t2 = and <3 x i8> %t1, %x
|
||||
%ret = icmp eq <3 x i8> %t2, %x
|
||||
ret <3 x i1> %ret
|
||||
}
|
||||
|
||||
define <3 x i1> @p3_vec_undef0(<3 x i8> %x, <3 x i8> %y) {
|
||||
; CHECK-LABEL: @p3_vec_undef0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl <3 x i8> <i8 1, i8 1, i8 1>, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use3i8(<3 x i8> [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add <3 x i8> [[T0]], <i8 -1, i8 undef, i8 -1>
|
||||
; CHECK-NEXT: [[T2:%.*]] = and <3 x i8> [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp eq <3 x i8> [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret <3 x i1> [[RET]]
|
||||
;
|
||||
%t0 = shl <3 x i8> <i8 1, i8 1, i8 1>, %y
|
||||
call void @use3i8(<3 x i8> %t0)
|
||||
%t1 = add <3 x i8> %t0, <i8 -1, i8 undef, i8 -1>
|
||||
%t2 = and <3 x i8> %t1, %x
|
||||
%ret = icmp eq <3 x i8> %t2, %x
|
||||
ret <3 x i1> %ret
|
||||
}
|
||||
|
||||
define <3 x i1> @p4_vec_undef2(<3 x i8> %x, <3 x i8> %y) {
|
||||
; CHECK-LABEL: @p4_vec_undef2(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl <3 x i8> <i8 1, i8 undef, i8 1>, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use3i8(<3 x i8> [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add <3 x i8> [[T0]], <i8 -1, i8 undef, i8 -1>
|
||||
; CHECK-NEXT: [[T2:%.*]] = and <3 x i8> [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp eq <3 x i8> [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret <3 x i1> [[RET]]
|
||||
;
|
||||
%t0 = shl <3 x i8> <i8 1, i8 undef, i8 1>, %y
|
||||
call void @use3i8(<3 x i8> %t0)
|
||||
%t1 = add <3 x i8> %t0, <i8 -1, i8 undef, i8 -1>
|
||||
%t2 = and <3 x i8> %t1, %x
|
||||
%ret = icmp eq <3 x i8> %t2, %x
|
||||
ret <3 x i1> %ret
|
||||
}
|
||||
|
||||
; ============================================================================ ;
|
||||
; Commutativity tests.
|
||||
; ============================================================================ ;
|
||||
|
||||
declare i8 @gen8()
|
||||
|
||||
define i1 @c0(i8 %y) {
|
||||
; CHECK-LABEL: @c0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[X]], [[T1]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 1, %y
|
||||
call void @use8(i8 %t0)
|
||||
%t1 = add i8 %t0, -1
|
||||
%x = call i8 @gen8()
|
||||
%t2 = and i8 %x, %t1 ; swapped order
|
||||
%ret = icmp eq i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @c1(i8 %y) {
|
||||
; CHECK-LABEL: @c1(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[X]], [[T2]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 1, %y
|
||||
call void @use8(i8 %t0)
|
||||
%t1 = add i8 %t0, -1
|
||||
%x = call i8 @gen8()
|
||||
%t2 = and i8 %t1, %x
|
||||
%ret = icmp eq i8 %x, %t2 ; swapped order
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @c2(i8 %y) {
|
||||
; CHECK-LABEL: @c2(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[X]], [[T1]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[X]], [[T2]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 1, %y
|
||||
call void @use8(i8 %t0)
|
||||
%t1 = add i8 %t0, -1
|
||||
%x = call i8 @gen8()
|
||||
%t2 = and i8 %x, %t1 ; swapped order
|
||||
%ret = icmp eq i8 %x, %t2 ; swapped order
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
; ============================================================================ ;
|
||||
; One-use tests. We don't care about multi-uses here.
|
||||
; ============================================================================ ;
|
||||
|
||||
define i1 @oneuse0(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @oneuse0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add i8 [[T0]], -1
|
||||
; CHECK-NEXT: call void @use8(i8 [[T1]])
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 1, %y
|
||||
call void @use8(i8 %t0) ; needed anyway
|
||||
%t1 = add i8 %t0, -1
|
||||
call void @use8(i8 %t1)
|
||||
%t2 = and i8 %t1, %x
|
||||
%ret = icmp eq i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @oneuse1(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @oneuse1(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T2]])
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 1, %y
|
||||
call void @use8(i8 %t0) ; needed anyway
|
||||
%t1 = add i8 %t0, -1
|
||||
%t2 = and i8 %t1, %x
|
||||
call void @use8(i8 %t2)
|
||||
%ret = icmp eq i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @oneuse2(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @oneuse2(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add i8 [[T0]], -1
|
||||
; CHECK-NEXT: call void @use8(i8 [[T1]])
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T2]])
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 1, %y
|
||||
call void @use8(i8 %t0)
|
||||
%t1 = add i8 %t0, -1
|
||||
call void @use8(i8 %t1)
|
||||
%t2 = and i8 %t1, %x
|
||||
call void @use8(i8 %t2)
|
||||
%ret = icmp eq i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
; ============================================================================ ;
|
||||
; Negative tests
|
||||
; ============================================================================ ;
|
||||
|
||||
define i1 @n0(i8 %x, i8 %y, i8 %notx) {
|
||||
; CHECK-LABEL: @n0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[T2]], [[NOTX:%.*]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 1, %y
|
||||
call void @use8(i8 %t0)
|
||||
%t1 = add i8 %t0, -1
|
||||
%t2 = and i8 %t1, %x
|
||||
%ret = icmp eq i8 %t2, %notx ; not %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @n1(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n1(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 -1, %y ; not 1
|
||||
call void @use8(i8 %t0)
|
||||
%t1 = add i8 %t0, -1
|
||||
%t2 = and i8 %t1, %x
|
||||
%ret = icmp eq i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @n2(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n2(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add i8 [[T0]], 1
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp eq i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 1, %y
|
||||
call void @use8(i8 %t0)
|
||||
%t1 = add i8 %t0, 1 ; not -1
|
||||
%t2 = and i8 %t1, %x
|
||||
%ret = icmp eq i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
|
@ -0,0 +1,291 @@
|
|||
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
||||
; RUN: opt < %s -instcombine -S | FileCheck %s
|
||||
|
||||
; https://bugs.llvm.org/show_bug.cgi?id=38123
|
||||
|
||||
; Pattern:
|
||||
; x & ((1 << y) + (-1)) != x
|
||||
; Should be transformed into:
|
||||
; x u> ((1 << y) + (-1))
|
||||
; That is then later transformed into:
|
||||
; (x >> y) != 0
|
||||
|
||||
; This pattern is uncanonical, but we can not canonicalize it due to extra uses.
|
||||
|
||||
declare void @use8(i8)
|
||||
declare void @use2i8(<2 x i8>)
|
||||
declare void @use3i8(<3 x i8>)
|
||||
|
||||
; ============================================================================ ;
|
||||
; Basic positive tests
|
||||
; ============================================================================ ;
|
||||
|
||||
define i1 @p0(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @p0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 1, %y
|
||||
call void @use8(i8 %t0)
|
||||
%t1 = add i8 %t0, -1
|
||||
%t2 = and i8 %t1, %x
|
||||
%ret = icmp ne i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
; ============================================================================ ;
|
||||
; Vector tests
|
||||
; ============================================================================ ;
|
||||
|
||||
define <2 x i1> @p1_vec(<2 x i8> %x, <2 x i8> %y) {
|
||||
; CHECK-LABEL: @p1_vec(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl <2 x i8> <i8 1, i8 1>, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use2i8(<2 x i8> [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add <2 x i8> [[T0]], <i8 -1, i8 -1>
|
||||
; CHECK-NEXT: [[T2:%.*]] = and <2 x i8> [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne <2 x i8> [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret <2 x i1> [[RET]]
|
||||
;
|
||||
%t0 = shl <2 x i8> <i8 1, i8 1>, %y
|
||||
call void @use2i8(<2 x i8> %t0)
|
||||
%t1 = add <2 x i8> %t0, <i8 -1, i8 -1>
|
||||
%t2 = and <2 x i8> %t1, %x
|
||||
%ret = icmp ne <2 x i8> %t2, %x
|
||||
ret <2 x i1> %ret
|
||||
}
|
||||
|
||||
define <3 x i1> @p2_vec_undef0(<3 x i8> %x, <3 x i8> %y) {
|
||||
; CHECK-LABEL: @p2_vec_undef0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl <3 x i8> <i8 1, i8 undef, i8 1>, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use3i8(<3 x i8> [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add <3 x i8> [[T0]], <i8 -1, i8 -1, i8 -1>
|
||||
; CHECK-NEXT: [[T2:%.*]] = and <3 x i8> [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne <3 x i8> [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret <3 x i1> [[RET]]
|
||||
;
|
||||
%t0 = shl <3 x i8> <i8 1, i8 undef, i8 1>, %y
|
||||
call void @use3i8(<3 x i8> %t0)
|
||||
%t1 = add <3 x i8> %t0, <i8 -1, i8 -1, i8 -1>
|
||||
%t2 = and <3 x i8> %t1, %x
|
||||
%ret = icmp ne <3 x i8> %t2, %x
|
||||
ret <3 x i1> %ret
|
||||
}
|
||||
|
||||
define <3 x i1> @p3_vec_undef0(<3 x i8> %x, <3 x i8> %y) {
|
||||
; CHECK-LABEL: @p3_vec_undef0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl <3 x i8> <i8 1, i8 1, i8 1>, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use3i8(<3 x i8> [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add <3 x i8> [[T0]], <i8 -1, i8 undef, i8 -1>
|
||||
; CHECK-NEXT: [[T2:%.*]] = and <3 x i8> [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne <3 x i8> [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret <3 x i1> [[RET]]
|
||||
;
|
||||
%t0 = shl <3 x i8> <i8 1, i8 1, i8 1>, %y
|
||||
call void @use3i8(<3 x i8> %t0)
|
||||
%t1 = add <3 x i8> %t0, <i8 -1, i8 undef, i8 -1>
|
||||
%t2 = and <3 x i8> %t1, %x
|
||||
%ret = icmp ne <3 x i8> %t2, %x
|
||||
ret <3 x i1> %ret
|
||||
}
|
||||
|
||||
define <3 x i1> @p4_vec_undef2(<3 x i8> %x, <3 x i8> %y) {
|
||||
; CHECK-LABEL: @p4_vec_undef2(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl <3 x i8> <i8 1, i8 undef, i8 1>, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use3i8(<3 x i8> [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add <3 x i8> [[T0]], <i8 -1, i8 undef, i8 -1>
|
||||
; CHECK-NEXT: [[T2:%.*]] = and <3 x i8> [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne <3 x i8> [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret <3 x i1> [[RET]]
|
||||
;
|
||||
%t0 = shl <3 x i8> <i8 1, i8 undef, i8 1>, %y
|
||||
call void @use3i8(<3 x i8> %t0)
|
||||
%t1 = add <3 x i8> %t0, <i8 -1, i8 undef, i8 -1>
|
||||
%t2 = and <3 x i8> %t1, %x
|
||||
%ret = icmp ne <3 x i8> %t2, %x
|
||||
ret <3 x i1> %ret
|
||||
}
|
||||
|
||||
; ============================================================================ ;
|
||||
; Commutativity tests.
|
||||
; ============================================================================ ;
|
||||
|
||||
declare i8 @gen8()
|
||||
|
||||
define i1 @c0(i8 %y) {
|
||||
; CHECK-LABEL: @c0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[X]], [[T1]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 1, %y
|
||||
call void @use8(i8 %t0)
|
||||
%t1 = add i8 %t0, -1
|
||||
%x = call i8 @gen8()
|
||||
%t2 = and i8 %x, %t1 ; swapped order
|
||||
%ret = icmp ne i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @c1(i8 %y) {
|
||||
; CHECK-LABEL: @c1(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[X]], [[T2]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 1, %y
|
||||
call void @use8(i8 %t0)
|
||||
%t1 = add i8 %t0, -1
|
||||
%x = call i8 @gen8()
|
||||
%t2 = and i8 %t1, %x
|
||||
%ret = icmp ne i8 %x, %t2 ; swapped order
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @c2(i8 %y) {
|
||||
; CHECK-LABEL: @c2(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[X]], [[T1]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[X]], [[T2]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 1, %y
|
||||
call void @use8(i8 %t0)
|
||||
%t1 = add i8 %t0, -1
|
||||
%x = call i8 @gen8()
|
||||
%t2 = and i8 %x, %t1 ; swapped order
|
||||
%ret = icmp ne i8 %x, %t2 ; swapped order
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
; ============================================================================ ;
|
||||
; One-use tests. We don't care about multi-uses here.
|
||||
; ============================================================================ ;
|
||||
|
||||
define i1 @oneuse0(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @oneuse0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add i8 [[T0]], -1
|
||||
; CHECK-NEXT: call void @use8(i8 [[T1]])
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 1, %y
|
||||
call void @use8(i8 %t0) ; needed anyway
|
||||
%t1 = add i8 %t0, -1
|
||||
call void @use8(i8 %t1)
|
||||
%t2 = and i8 %t1, %x
|
||||
%ret = icmp ne i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @oneuse1(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @oneuse1(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T2]])
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 1, %y
|
||||
call void @use8(i8 %t0) ; needed anyway
|
||||
%t1 = add i8 %t0, -1
|
||||
%t2 = and i8 %t1, %x
|
||||
call void @use8(i8 %t2)
|
||||
%ret = icmp ne i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @oneuse2(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @oneuse2(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add i8 [[T0]], -1
|
||||
; CHECK-NEXT: call void @use8(i8 [[T1]])
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T2]])
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 1, %y
|
||||
call void @use8(i8 %t0)
|
||||
%t1 = add i8 %t0, -1
|
||||
call void @use8(i8 %t1)
|
||||
%t2 = and i8 %t1, %x
|
||||
call void @use8(i8 %t2)
|
||||
%ret = icmp ne i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
; ============================================================================ ;
|
||||
; Negative tests
|
||||
; ============================================================================ ;
|
||||
|
||||
define i1 @n0(i8 %x, i8 %y, i8 %notx) {
|
||||
; CHECK-LABEL: @n0(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[T2]], [[NOTX:%.*]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 1, %y
|
||||
call void @use8(i8 %t0)
|
||||
%t1 = add i8 %t0, -1
|
||||
%t2 = and i8 %t1, %x
|
||||
%ret = icmp ne i8 %t2, %notx ; not %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @n1(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n1(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 -1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add i8 [[T0]], -1
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 -1, %y ; not 1
|
||||
call void @use8(i8 %t0)
|
||||
%t1 = add i8 %t0, -1
|
||||
%t2 = and i8 %t1, %x
|
||||
%ret = icmp ne i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
|
||||
define i1 @n2(i8 %x, i8 %y) {
|
||||
; CHECK-LABEL: @n2(
|
||||
; CHECK-NEXT: [[T0:%.*]] = shl i8 1, [[Y:%.*]]
|
||||
; CHECK-NEXT: call void @use8(i8 [[T0]])
|
||||
; CHECK-NEXT: [[T1:%.*]] = add i8 [[T0]], 1
|
||||
; CHECK-NEXT: [[T2:%.*]] = and i8 [[T1]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[T2]], [[X]]
|
||||
; CHECK-NEXT: ret i1 [[RET]]
|
||||
;
|
||||
%t0 = shl i8 1, %y
|
||||
call void @use8(i8 %t0)
|
||||
%t1 = add i8 %t0, 1 ; not -1
|
||||
%t2 = and i8 %t1, %x
|
||||
%ret = icmp ne i8 %t2, %x
|
||||
ret i1 %ret
|
||||
}
|
||||
Loading…
Reference in New Issue