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33 lines
850 B
LLVM
33 lines
850 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instsimplify -S | FileCheck %s
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; %result = x & (1 ^ sel) = (x & 1) ^ (x & sel)
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; = x ^ (select cond, false, false)
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; = x ^ false = x
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;
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define i1 @f(i1 %cond, i1 noundef %x, i1 %y, i1 %z) {
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; CHECK-LABEL: @f(
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; CHECK-NEXT: ret i1 [[X:%.*]]
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;
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%notx = xor i1 %x, 1
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%lhs = and i1 %notx, %y
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%rhs = and i1 %notx, %z
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%sel = select i1 %cond, i1 %lhs, i1 %rhs
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%op1 = xor i1 1, %sel
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%result = and i1 %x, %op1
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ret i1 %result
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}
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define i1 @f_dontfold(i1 %cond, i1 %x, i1 %y, i1 %z) {
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; CHECK-LABEL: @f_dontfold(
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; CHECK-NEXT: ret i1 [[X:%.*]]
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;
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%notx = xor i1 %x, 1
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%lhs = and i1 %notx, %y
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%rhs = and i1 %notx, %z
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%sel = select i1 %cond, i1 %lhs, i1 %rhs
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%op1 = xor i1 1, %sel
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%result = and i1 %x, %op1
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ret i1 %result
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}
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