Reviewers: Michael Starzinger, titzer,
Description:
Prefill allocated objects with one word fillers if we do not use allocation
folding.
BUG=
Please review this at https://codereview.chromium.org/22903027/
SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files:
M src/hydrogen-instructions.h
Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index
41f9d0d5ccdecae37ed1cf08206f09136a6f8476..7f6ea33aec190d5b151de1fceff1f2441b85ad3d
100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -5120,8 +5120,12 @@ class HAllocate: public HTemplateInstruction<2> {
? ALLOCATE_IN_OLD_POINTER_SPACE : ALLOCATE_IN_OLD_DATA_SPACE)
: ALLOCATE_IN_NEW_SPACE;
if (instance_type == FIXED_DOUBLE_ARRAY_TYPE) {
- flags_ = static_cast<HAllocate::Flags>(flags_ |
- ALLOCATE_DOUBLE_ALIGNED);
+ flags_ = static_cast<HAllocate::Flags>(flags_ |
ALLOCATE_DOUBLE_ALIGNED);
+ }
+ // We have to fill the allocated object with one word fillers if we do
+ // not use allocation folding.
+ if (!FLAG_use_gvn || !FLAG_use_allocation_folding) {
+ flags_ = static_cast<HAllocate::Flags>(flags_ | PREFILL_WITH_FILLER);
}
}
--
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