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35 lines
1.2 KiB
Plaintext
35 lines
1.2 KiB
Plaintext
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; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep select | not grep 'int\*'
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; This testcase corresponds to PR362, which notices that this horrible code
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; is generated by the C++ front-end and LLVM optimizers, which has lots of
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; loads and other stuff that are unneeded.
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;
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; Instcombine should propagate the load through the select instructions to
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; allow elimination of the extra stuff by the mem2reg pass.
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implementation ; Functions:
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void %_Z5test1RiS_(int* %x, int* %y) {
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entry:
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%tmp.1.i = load int* %y ; <int> [#uses=1]
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%tmp.3.i = load int* %x ; <int> [#uses=1]
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%tmp.4.i = setlt int %tmp.1.i, %tmp.3.i ; <bool> [#uses=1]
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%retval.i = select bool %tmp.4.i, int* %y, int* %x ; <int*> [#uses=1]
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%tmp.4 = load int* %retval.i ; <int> [#uses=1]
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store int %tmp.4, int* %x
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ret void
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}
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void %_Z5test2RiS_(int* %x, int* %y) {
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entry:
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%tmp.0 = alloca int ; <int*> [#uses=2]
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%tmp.2 = load int* %x ; <int> [#uses=2]
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store int %tmp.2, int* %tmp.0
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%tmp.3.i = load int* %y ; <int> [#uses=1]
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%tmp.4.i = setlt int %tmp.2, %tmp.3.i ; <bool> [#uses=1]
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%retval.i = select bool %tmp.4.i, int* %y, int* %tmp.0 ; <int*> [#uses=1]
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%tmp.6 = load int* %retval.i ; <int> [#uses=1]
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store int %tmp.6, int* %y
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ret void
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}
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