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29 lines
843 B
LLVM
29 lines
843 B
LLVM
; RUN: opt < %s -reassociate -dce -S | \
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; RUN: not grep {\\(and\\|sub\\)}
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define i32 @test1(i32 %a, i32 %b) {
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%tmp.2 = and i32 %b, %a ; <i32> [#uses=1]
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%tmp.4 = xor i32 %a, -1 ; <i32> [#uses=1]
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; (A&B)&~A == 0
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%tmp.5 = and i32 %tmp.2, %tmp.4 ; <i32> [#uses=1]
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ret i32 %tmp.5
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}
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define i32 @test2(i32 %a, i32 %b) {
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%tmp.1 = and i32 %a, 1234 ; <i32> [#uses=1]
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%tmp.2 = and i32 %b, %tmp.1 ; <i32> [#uses=1]
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%tmp.4 = xor i32 %a, -1 ; <i32> [#uses=1]
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; A&~A == 0
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%tmp.5 = and i32 %tmp.2, %tmp.4 ; <i32> [#uses=1]
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ret i32 %tmp.5
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}
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define i32 @test3(i32 %b, i32 %a) {
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%tmp.1 = add i32 %a, 1234 ; <i32> [#uses=1]
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%tmp.2 = add i32 %b, %tmp.1 ; <i32> [#uses=1]
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%tmp.4 = sub i32 0, %a ; <i32> [#uses=1]
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; (b+(a+1234))+-a -> b+1234
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%tmp.5 = add i32 %tmp.2, %tmp.4 ; <i32> [#uses=1]
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ret i32 %tmp.5
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}
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