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Unified Diff: src/x64/full-codegen-x64.cc

Issue 2850043: Specialize GenericUnaryStub so that it knows whether it needs to... (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: '' Created 10 years, 6 months ago
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Index: src/x64/full-codegen-x64.cc
===================================================================
--- src/x64/full-codegen-x64.cc (revision 5015)
+++ src/x64/full-codegen-x64.cc (working copy)
@@ -2807,9 +2807,11 @@
case Token::SUB: {
Comment cmt(masm_, "[ UnaryOperation (SUB)");
- bool overwrite =
+ bool can_overwrite =
(expr->expression()->AsBinaryOperation() != NULL &&
expr->expression()->AsBinaryOperation()->ResultOverwriteAllowed());
+ UnaryOverwriteMode overwrite =
+ can_overwrite ? UNARY_OVERWRITE : UNARY_NO_OVERWRITE;
GenericUnaryOpStub stub(Token::SUB, overwrite);
// GenericUnaryOpStub expects the argument to be in the
// accumulator register rax.
@@ -2821,9 +2823,11 @@
case Token::BIT_NOT: {
Comment cmt(masm_, "[ UnaryOperation (BIT_NOT)");
- bool overwrite =
+ bool can_overwrite =
(expr->expression()->AsBinaryOperation() != NULL &&
expr->expression()->AsBinaryOperation()->ResultOverwriteAllowed());
+ UnaryOverwriteMode overwrite =
+ can_overwrite ? UNARY_OVERWRITE : UNARY_NO_OVERWRITE;
GenericUnaryOpStub stub(Token::BIT_NOT, overwrite);
// GenericUnaryOpStub expects the argument to be in the
// accumulator register rax.
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