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Test that we can reassociate (x<<1)+(y<<1) -> (X+Y)<<1.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26752 91177308-0d34-0410-b5e6-96231b3b80d8
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11
test/Transforms/Reassociate/shift-factor.ll
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11
test/Transforms/Reassociate/shift-factor.ll
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@ -0,0 +1,11 @@
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; There should be exactly one shift and one add left.
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; RUN: llvm-as < %s | opt -reassociate -instcombine | llvm-dis | grep shl | wc -l | grep 1 &&
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; RUN: llvm-as < %s | opt -reassociate -instcombine | llvm-dis | grep add | wc -l | grep 1
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int %test(int %X, int %Y) {
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%tmp.2 = shl int %X, ubyte 1 ; <int> [#uses=1]
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%tmp.6 = shl int %Y, ubyte 1 ; <int> [#uses=1]
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%tmp.4 = add int %tmp.6, %tmp.2 ; <int> [#uses=1]
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ret int %tmp.4
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}
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