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4d5ef8fb85
We sometimes create intermediate subtract instructions during reassociation. Adding these to the worklist to revisit exposes many additional reassociation opportunities. Patch by Aditya Nandakumar. llvm-svn: 253240
25 lines
652 B
LLVM
25 lines
652 B
LLVM
; RUN: opt -S -reassociate < %s | FileCheck %s
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; rdar://9167457
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; Reassociate shouldn't break this testcase involving a secondary
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; reassociation.
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; CHECK: define
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; CHECK-NOT: undef
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; CHECK: %factor = mul i32 %tmp3.neg, 2
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; CHECK-NOT: undef
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; CHECK: }
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define void @x0f2f640ab6718391b59ce96d9fdeda54(i32 %arg, i32 %arg1, i32 %arg2, i32* %.out) nounwind {
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_:
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%tmp = sub i32 %arg, %arg1
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%tmp3 = mul i32 %tmp, -1268345047
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%tmp4 = add i32 %tmp3, 2014710503
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%tmp5 = add i32 %tmp3, -1048397418
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%tmp6 = sub i32 %tmp4, %tmp5
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%tmp7 = sub i32 -2014710503, %tmp3
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%tmp8 = add i32 %tmp6, %tmp7
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store i32 %tmp8, i32* %.out
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ret void
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}
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