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d7a835fcba
llvm-svn: 21777
25 lines
677 B
LLVM
25 lines
677 B
LLVM
; RUN: llvm-as < %s | opt -reassociate -dce | llvm-dis | not grep '\(and\|sub\)'
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int %test1(int %a, int %b) {
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%tmp.2 = and int %b, %a
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%tmp.4 = xor int %a, -1
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%tmp.5 = and int %tmp.2, %tmp.4 ; (A&B)&~A == 0
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ret int %tmp.5
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}
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int %test2(int %a, int %b) {
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%tmp.1 = and int %a, 1234
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%tmp.2 = and int %b, %tmp.1
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%tmp.4 = xor int %a, -1
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%tmp.5 = and int %tmp.2, %tmp.4 ; A&~A == 0
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ret int %tmp.5
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}
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int %test3(int %b, int %a) {
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%tmp.1 = add int %a, 1234
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%tmp.2 = add int %b, %tmp.1
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%tmp.4 = sub int 0, %a
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%tmp.5 = add int %tmp.2, %tmp.4 ; (b+(a+1234))+-a -> b+1234
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ret int %tmp.5
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}
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