forked from OSchip/llvm-project
22 lines
461 B
LLVM
22 lines
461 B
LLVM
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; RUN: opt < %s -instsimplify -S | FileCheck %s
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define i32 @factorize(i32 %x, i32 %y) {
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; CHECK: @factorize
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; (X | 2) & (X | 2) -> X | (1 & 2) -> X
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%l = or i32 %x, 1
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%r = or i32 %x, 2
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%z = and i32 %l, %r
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ret i32 %z
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; CHECK: ret i32 %x
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}
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define i32 @expand(i32 %x) {
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; CHECK: @expand
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; ((X & 1) | 2) & 1 -> ((X & 1) & 1) | (2 & 1) -> (X & 1) | 0 -> X & 1
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%a = and i32 %x, 1
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%b = or i32 %a, 2
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%c = and i32 %b, 1
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ret i32 %c
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; CHECK: ret i32 %a
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}
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