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Unified Diff: src/arm/lithium-codegen-arm.cc

Issue 10908195: Fix delta computation in DoDeferredInstanceOfKnownGlobal() for ARM. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Remove comment Created 8 years, 3 months ago
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Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index 4be6d264a8f69d16cebe90c1a986703e2ccb0615..e9ba5eec7212d297400f31291dc5d62f2c308686 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -2472,12 +2472,18 @@ void LCodeGen::DoDeferredInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr,
Register temp = ToRegister(instr->TempAt(0));
ASSERT(temp.is(r4));
__ LoadHeapObject(InstanceofStub::right(), instr->function());
- static const int kAdditionalDelta = 4;
+ static const int kAdditionalDelta = 5;
int delta = masm_->InstructionsGeneratedSince(map_check) + kAdditionalDelta;
Label before_push_delta;
__ bind(&before_push_delta);
__ BlockConstPoolFor(kAdditionalDelta);
__ mov(temp, Operand(delta * kPointerSize));
+ // The mov above can generate one or two instructions. The delta was computed
+ // for two instructions, so we need to pad here in case of one instruction.
+ if (masm_->InstructionsGeneratedSince(&before_push_delta) != 2) {
+ ASSERT_EQ(1, masm_->InstructionsGeneratedSince(&before_push_delta));
+ __ nop();
+ }
__ StoreToSafepointRegisterSlot(temp, temp);
CallCodeGeneric(stub.GetCode(),
RelocInfo::CODE_TARGET,
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