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Test that we can reassociate (x<<1)+(y<<1) -> (X+Y)<<1.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26752 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner 2006-03-14 06:54:32 +00:00
parent 09a053a777
commit 000c7c4c7b
1 changed files with 11 additions and 0 deletions
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test/Transforms/Reassociate/shift-factor.ll Normal file
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; There should be exactly one shift and one add left.
; RUN: llvm-as < %s | opt -reassociate -instcombine | llvm-dis | grep shl | wc -l | grep 1 &&
; RUN: llvm-as < %s | opt -reassociate -instcombine | llvm-dis | grep add | wc -l | grep 1
int %test(int %X, int %Y) {
%tmp.2 = shl int %X, ubyte 1 ; <int> [#uses=1]
%tmp.6 = shl int %Y, ubyte 1 ; <int> [#uses=1]
%tmp.4 = add int %tmp.6, %tmp.2 ; <int> [#uses=1]
ret int %tmp.4
}