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Fix bug in r6930 and r6933

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The loading the register used for the null object was to early and it could be clobbered.

TBR=karlklose@chromium.org
BUG=none
TEST=mozilla/ecma_3/Statements/regress-131348
Review URL: http://codereview.chromium.org/6578020

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6937 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
sgjesse@chromium.org 2011-02-24 15:26:27 +00:00
parent 7560fa903b
commit 1ef2b9a385
2 changed files with 4 additions and 8 deletions
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6
src/arm/full-codegen-arm.cc
View File

@ -880,10 +880,6 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
ForIn loop_statement(this, stmt);
increment_loop_depth();
// Load null value as it is used several times below.
Register null_value = r5;
__ LoadRoot(null_value, Heap::kNullValueRootIndex);
// Get the object to enumerate over. Both SpiderMonkey and JSC
// ignore null and undefined in contrast to the specification; see
// ECMA-262 section 12.6.4.
@ -891,6 +887,8 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
__ LoadRoot(ip, Heap::kUndefinedValueRootIndex);
__ cmp(r0, ip);
__ b(eq, &exit);
Register null_value = r5;
__ LoadRoot(null_value, Heap::kNullValueRootIndex);
__ cmp(r0, null_value);
__ b(eq, &exit);

6
src/x64/full-codegen-x64.cc
View File

@ -854,16 +854,14 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
ForIn loop_statement(this, stmt);
increment_loop_depth();
// Load null value as it is used several times below.
Register null_value = rdi;
__ LoadRoot(null_value, Heap::kNullValueRootIndex);
// Get the object to enumerate over. Both SpiderMonkey and JSC
// ignore null and undefined in contrast to the specification; see
// ECMA-262 section 12.6.4.
VisitForAccumulatorValue(stmt->enumerable());
__ CompareRoot(rax, Heap::kUndefinedValueRootIndex);
__ j(equal, &exit);
Register null_value = rdi;
__ LoadRoot(null_value, Heap::kNullValueRootIndex);
__ cmpq(rax, null_value);
__ j(equal, &exit);