forked from OSchip/llvm-project
43 lines
932 B
LLVM
43 lines
932 B
LLVM
; This test makes sure that the xor instructions are properly eliminated
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; when arbitrary precision integers are used.
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; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep xor
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define i33 @test1(i33 %A) {
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%B = xor i33 %A, -1
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%C = xor i33 %B, -1
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ret i33 %C
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}
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define i1 @test2(i52 %A, i52 %B) {
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%cond = icmp ule i52 %A, %B ; Can change into uge
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%Ret = xor i1 %cond, true
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ret i1 %Ret
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}
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; Test that demorgans law can be instcombined
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define i47 @test3(i47 %A, i47 %B) {
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%a = xor i47 %A, -1
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%b = xor i47 %B, -1
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%c = and i47 %a, %b
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%d = xor i47 %c, -1
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ret i47 %d
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}
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; Test that demorgens law can work with constants
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define i61 @test4(i61 %A, i61 %B) {
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%a = xor i61 %A, -1
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%c = and i61 %a, 5 ; 5 = ~c2
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%d = xor i61 %c, -1
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ret i61 %d
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}
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; test the mirror of demorgans law...
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define i71 @test5(i71 %A, i71 %B) {
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%a = xor i71 %A, -1
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%b = xor i71 %B, -1
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%c = or i71 %a, %b
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%d = xor i71 %c, -1
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ret i71 %d
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}
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