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https://github.com/c64scene-ar/llvm-6502.git
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efd74a0159
to run the die pass after it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11942 91177308-0d34-0410-b5e6-96231b3b80d8
46 lines
874 B
LLVM
46 lines
874 B
LLVM
; This test makes sure that these instructions are properly eliminated.
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;
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; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep xor
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implementation
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int %test1(int %A) {
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%B = xor int %A, -1
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%C = xor int %B, -1
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ret int %C
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}
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bool %test2(int %A, int %B) {
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%cond = setle int %A, %B ; Can change into setge
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%Ret = xor bool %cond, true
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ret bool %Ret
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}
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; Test that demorgans law can be instcombined
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int %test3(int %A, int %B) {
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%a = xor int %A, -1
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%b = xor int %B, -1
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%c = and int %a, %b
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%d = xor int %c, -1
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ret int %d
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}
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; Test that demorgens law can work with constants
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int %test4(int %A, int %B) {
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%a = xor int %A, -1
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%c = and int %a, 5 ; 5 = ~c2
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%d = xor int %c, -1
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ret int %d
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}
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; test the mirror of demorgans law...
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int %test5(int %A, int %B) {
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%a = xor int %A, -1
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%b = xor int %B, -1
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%c = or int %a, %b
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%d = xor int %c, -1
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ret int %d
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}
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