mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-02 09:29:24 +00:00
4333f49afe
turn icmp eq a+x, b+x into icmp eq a, b if a+x or b+x has other uses. This may have been increasing register pressure leading to the bzip2 slowdown. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63487 91177308-0d34-0410-b5e6-96231b3b80d8
42 lines
739 B
LLVM
42 lines
739 B
LLVM
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep xor
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define i1 @test1(i8 %x, i8 %y) {
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%X = xor i8 %x, 128
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%Y = xor i8 %y, 128
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%tmp = icmp slt i8 %X, %Y
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ret i1 %tmp
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}
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define i1 @test2(i8 %x, i8 %y) {
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%X = xor i8 %x, 128
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%Y = xor i8 %y, 128
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%tmp = icmp ult i8 %X, %Y
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ret i1 %tmp
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}
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define i1 @test3(i8 %x) {
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%X = xor i8 %x, 128
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%tmp = icmp uge i8 %X, 15
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ret i1 %tmp
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}
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define i1 @test4(i8 %x, i8 %y) {
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%X = xor i8 %x, 127
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%Y = xor i8 %y, 127
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%tmp = icmp slt i8 %X, %Y
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ret i1 %tmp
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}
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define i1 @test5(i8 %x, i8 %y) {
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%X = xor i8 %x, 127
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%Y = xor i8 %y, 127
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%tmp = icmp ult i8 %X, %Y
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ret i1 %tmp
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}
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define i1 @test6(i8 %x) {
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%X = xor i8 %x, 127
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%tmp = icmp uge i8 %X, 15
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ret i1 %tmp
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}
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