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Use filler maps for folded allocations when verify heap is turned on.

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BUG=
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/18863011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15636 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
hpayer@chromium.org 2013-07-11 15:29:02 +00:00
parent 6c13f097d6
commit 90056df999
1 changed files with 32 additions and 0 deletions
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32
src/hydrogen-instructions.cc
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@ -3216,6 +3216,38 @@ void HAllocate::HandleSideEffectDominator(GVNFlag side_effect,
new_dominator_size->InsertBefore(dominator_allocate_instr);
dominator_allocate_instr->UpdateSize(new_dominator_size);
#ifdef VERIFY_HEAP
HInstruction* free_space_instr =
new(zone) HInnerAllocatedObject(dominator_allocate_instr,
dominator_size_constant,
type());
free_space_instr->InsertAfter(dominator_allocate_instr);
HConstant* filler_map = new(zone) HConstant(
isolate()->factory()->free_space_map(),
UniqueValueId(isolate()->heap()->free_space_map()),
Representation::Tagged(),
HType::Tagged(),
false,
true,
false,
false);
filler_map->InsertAfter(free_space_instr);
HInstruction* store_map = new(zone) HStoreNamedField(
free_space_instr, HObjectAccess::ForMap(), filler_map);
store_map->SetFlag(HValue::kHasNoObservableSideEffects);
store_map->InsertAfter(filler_map);
HInstruction* free_space_size = new(zone) HConstant(current_size_constant);
free_space_size->InsertAfter(store_map);
HObjectAccess access =
HObjectAccess::ForJSObjectOffset(FreeSpace::kSizeOffset);
HInstruction* store_size = new(zone) HStoreNamedField(
free_space_instr, access, free_space_size);
store_size->SetFlag(HValue::kHasNoObservableSideEffects);
store_size->InsertAfter(free_space_size);
#endif
// After that replace the dominated allocate instruction.
HInstruction* dominated_allocate_instr =
new(zone) HInnerAllocatedObject(dominator_allocate_instr,