40 lines
1.1 KiB
LLVM
40 lines
1.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -aggressive-instcombine -S | FileCheck %s
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; PR37098 - https://bugs.llvm.org/show_bug.cgi?id=37098
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define i32 @two_bit_mask(i32 %x) {
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; CHECK-LABEL: @two_bit_mask(
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; CHECK-NEXT: [[S:%.*]] = lshr i32 [[X:%.*]], 3
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; CHECK-NEXT: [[O:%.*]] = or i32 [[S]], [[X]]
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; CHECK-NEXT: [[R:%.*]] = and i32 [[O]], 1
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; CHECK-NEXT: ret i32 [[R]]
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;
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%s = lshr i32 %x, 3
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%o = or i32 %s, %x
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%r = and i32 %o, 1
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ret i32 %r
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}
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define i32 @four_bit_mask(i32 %x) {
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; CHECK-LABEL: @four_bit_mask(
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; CHECK-NEXT: [[T1:%.*]] = lshr i32 [[X:%.*]], 3
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; CHECK-NEXT: [[T2:%.*]] = lshr i32 [[X]], 5
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; CHECK-NEXT: [[T3:%.*]] = lshr i32 [[X]], 8
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; CHECK-NEXT: [[O1:%.*]] = or i32 [[T1]], [[X]]
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; CHECK-NEXT: [[O2:%.*]] = or i32 [[T2]], [[T3]]
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; CHECK-NEXT: [[O3:%.*]] = or i32 [[O1]], [[O2]]
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; CHECK-NEXT: [[R:%.*]] = and i32 [[O3]], 1
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; CHECK-NEXT: ret i32 [[R]]
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;
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%t1 = lshr i32 %x, 3
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%t2 = lshr i32 %x, 5
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%t3 = lshr i32 %x, 8
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%o1 = or i32 %t1, %x
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%o2 = or i32 %t2, %t3
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%o3 = or i32 %o1, %o2
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%r = and i32 %o3, 1
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ret i32 %r
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}
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