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ConstantFoldSelectInstruction swapped the operands of the select. 

Fix 12592. Patch by Matt Pharr.

llvm-svn: 155480
This commit is contained in:
Nadav Rotem 2012-04-24 20:18:49 +00:00
parent d50c3b2c57
commit 450d69a5ee
2 changed files with 14 additions and 1 deletions
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2
llvm/lib/VMCore/ConstantFold.cpp
View File

@ -700,7 +700,7 @@ Constant *llvm::ConstantFoldSelectInstruction(Constant *Cond,
ConstantInt *Cond = dyn_cast<ConstantInt>(CondV->getOperand(i));
if (Cond == 0) break;
Constant *Res = (Cond->getZExtValue() ? V2 : V1)->getAggregateElement(i);
Constant *Res = (Cond->getZExtValue() ? V1 : V2)->getAggregateElement(i);
if (Res == 0) break;
Result.push_back(Res);
}

13
llvm/test/Transforms/InstCombine/2012-04-24-vselect.ll Normal file
View File

@ -0,0 +1,13 @@
; RUN: opt -instcombine -S < %s | FileCheck %s
; CHECK: @foo
; CHECK: <i32 1, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0>
define <8 x i32> @foo() nounwind {
entry:
%v1.i = select <8 x i1> <i1 true, i1 false, i1 false, i1 false, i1 false, i1 false, i1 false, i1 false>,
<8 x i32> <i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1>,
<8 x i32> <i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0>
ret <8 x i32> %v1.i
}