MIPS: Prefill pre-allocated memory of folded allocation with one pointer fillers when heap verifier is on.
Port r15798 (3b92806) BUG= Review URL: https://codereview.chromium.org/19485006 Patch from Balazs Kilvady <kilvadyb@homejinni.com>. git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15809 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
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@ -5323,6 +5323,25 @@ void LCodeGen::DoAllocate(LAllocate* instr) {
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}
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__ bind(deferred->exit());
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if (instr->hydrogen()->MustPrefillWithFiller()) {
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if (instr->size()->IsConstantOperand()) {
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int32_t size = ToInteger32(LConstantOperand::cast(instr->size()));
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__ li(scratch, Operand(size));
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} else {
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scratch = ToRegister(instr->size());
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}
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__ Subu(scratch, scratch, Operand(kPointerSize));
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__ Subu(result, result, Operand(kHeapObjectTag));
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Label loop;
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__ bind(&loop);
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__ li(scratch2, Operand(isolate()->factory()->one_pointer_filler_map()));
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__ Addu(at, result, Operand(scratch));
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__ sw(scratch2, MemOperand(at));
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__ Subu(scratch, scratch, Operand(kPointerSize));
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__ Branch(&loop, ge, scratch, Operand(zero_reg));
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__ Addu(result, result, Operand(kHeapObjectTag));
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}
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}
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