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24 lines
765 B
LLVM
24 lines
765 B
LLVM
; RUN: llvm-as < %s | opt -reassociate -gvn -instcombine | llvm-dis | not grep add
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@a = weak global i32 0 ; <i32*> [#uses=1]
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@b = weak global i32 0 ; <i32*> [#uses=1]
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@c = weak global i32 0 ; <i32*> [#uses=1]
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@d = weak global i32 0 ; <i32*> [#uses=0]
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define i32 @foo() {
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%tmp.0 = load i32* @a ; <i32> [#uses=2]
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%tmp.1 = load i32* @b ; <i32> [#uses=2]
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; (a+b)
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%tmp.2 = add i32 %tmp.0, %tmp.1 ; <i32> [#uses=1]
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%tmp.4 = load i32* @c ; <i32> [#uses=2]
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; (a+b)+c
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%tmp.5 = add i32 %tmp.2, %tmp.4 ; <i32> [#uses=1]
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; (a+c)
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%tmp.8 = add i32 %tmp.0, %tmp.4 ; <i32> [#uses=1]
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; (a+c)+b
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%tmp.11 = add i32 %tmp.8, %tmp.1 ; <i32> [#uses=1]
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; X ^ X = 0
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%RV = xor i32 %tmp.5, %tmp.11 ; <i32> [#uses=1]
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ret i32 %RV
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}
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