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Fix serious bug in VSelMovmskOpt

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When the mask was all off, we'd choose the incorrect operand!

(This bug was masked since this optimization wasn't triggering as
intended, due to other issues to be fixed in a forthcoming commit.
This commit is contained in:
Matt Pharr
2012-04-18 10:26:22 -07:00
parent abf7c423bb
commit 645a8c9349
1 changed files with 3 additions and 3 deletions
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6
opt.cpp
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@@ -1,5 +1,5 @@
/*
Copyright (c) 2010-2011, Intel Corporation
Copyright (c) 2010-2012, Intel Corporation
All rights reserved.
Redistribution and use in source and binary forms, with or without
@@ -899,8 +899,8 @@ VSelMovmskOpt::runOnBasicBlock(llvm::BasicBlock &bb) {
// Mask all on -> replace with the first select value
value = selectInst->getOperand(1);
else if (mask == 0)
// Mask all off -> replace with the second select blend value
value = selectInst->getOperand(1);
// Mask all off -> replace with the second select value
value = selectInst->getOperand(2);
if (value != NULL) {
llvm::ReplaceInstWithValue(iter->getParent()->getInstList(),