c3175c50a3
if (C1 & C2) == C2 then (X & C1) - (X & C2) --> X & (C1 ^ C2) Alive2: https://alive2.llvm.org/ce/z/JvQU8w
84 lines
2.3 KiB
LLVM
84 lines
2.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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define i8 @and_sub(i8 %a) {
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; CHECK-LABEL: @and_sub(
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; CHECK-NEXT: [[RET:%.*]] = and i8 [[A:%.*]], 12
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; CHECK-NEXT: ret i8 [[RET]]
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;
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%and1 = and i8 %a, 15
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%and2 = and i8 %a, 3
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%ret = sub i8 %and1, %and2
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ret i8 %ret
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}
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declare void @use(i8)
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define i8 @and_sub_multi_use(i8 %a) {
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; CHECK-LABEL: @and_sub_multi_use(
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; CHECK-NEXT: [[AND1:%.*]] = and i8 [[A:%.*]], 15
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; CHECK-NEXT: call void @use(i8 [[AND1]])
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; CHECK-NEXT: [[AND2:%.*]] = and i8 [[A]], 3
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; CHECK-NEXT: call void @use(i8 [[AND2]])
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; CHECK-NEXT: [[RET:%.*]] = and i8 [[A]], 12
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; CHECK-NEXT: ret i8 [[RET]]
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;
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%and1 = and i8 %a, 15
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call void @use(i8 %and1)
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%and2 = and i8 %a, 3
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call void @use(i8 %and2)
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%ret = sub i8 %and1, %and2
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ret i8 %ret
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}
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define <2 x i32> @and_sub_vec(<2 x i32> %a) {
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; CHECK-LABEL: @and_sub_vec(
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; CHECK-NEXT: [[RET:%.*]] = and <2 x i32> [[A:%.*]], <i32 3, i32 8>
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; CHECK-NEXT: ret <2 x i32> [[RET]]
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;
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%and1 = and <2 x i32> %a, <i32 11, i32 10>
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%and2 = and <2 x i32> %a, <i32 8, i32 2>
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%ret = sub <2 x i32> %and1, %and2
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ret <2 x i32> %ret
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}
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define <2 x i32> @and_sub_vec_posion(<2 x i32> %a) {
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; CHECK-LABEL: @and_sub_vec_posion(
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; CHECK-NEXT: ret <2 x i32> poison
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;
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%and1 = and <2 x i32> %a, <i32 11, i32 poison>
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%and2 = and <2 x i32> %a, <i32 poison, i32 2>
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%ret = sub <2 x i32> %and1, %and2
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ret <2 x i32> %ret
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}
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define <2 x i32> @and_sub_vec_undef(<2 x i32> %a) {
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; CHECK-LABEL: @and_sub_vec_undef(
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; CHECK-NEXT: [[AND1:%.*]] = and <2 x i32> [[A:%.*]], <i32 11, i32 undef>
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; CHECK-NEXT: [[AND2:%.*]] = and <2 x i32> [[A]], <i32 undef, i32 2>
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; CHECK-NEXT: [[RET:%.*]] = sub <2 x i32> [[AND1]], [[AND2]]
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; CHECK-NEXT: ret <2 x i32> [[RET]]
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;
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%and1 = and <2 x i32> %a, <i32 11, i32 undef>
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%and2 = and <2 x i32> %a, <i32 undef, i32 2>
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%ret = sub <2 x i32> %and1, %and2
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ret <2 x i32> %ret
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}
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define i8 @and_sub_negtive(i8 %a) {
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; CHECK-LABEL: @and_sub_negtive(
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; CHECK-NEXT: [[AND1:%.*]] = and i8 [[A:%.*]], 10
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; CHECK-NEXT: [[AND2:%.*]] = and i8 [[A]], 9
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; CHECK-NEXT: [[RET:%.*]] = sub nsw i8 [[AND1]], [[AND2]]
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; CHECK-NEXT: ret i8 [[RET]]
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;
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%and1 = and i8 %a, 10
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%and2 = and i8 %a, 9
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%ret = sub i8 %and1, %and2
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ret i8 %ret
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}
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