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[turbofan] Enforce allocation of register for imull/mull.

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R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/697073002

Cr-Commit-Position: refs/heads/master@{#25066}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25066 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
bmeurer@chromium.org 2014-11-03 11:50:08 +00:00
parent 832a5b930d
commit 5dc9365bc0
1 changed files with 3 additions and 1 deletions
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4
src/compiler/x64/instruction-selector-x64.cc
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@ -414,8 +414,10 @@ void VisitMulHigh(InstructionSelector* selector, Node* node,
if (selector->IsLive(left) && !selector->IsLive(right)) {
std::swap(left, right);
}
// TODO(turbofan): We use UseUniqueRegister here to improve register
// allocation.
selector->Emit(opcode, g.DefineAsFixed(node, rdx), g.UseFixed(left, rax),
g.UseUnique(right));
g.UseUniqueRegister(right));
}