src/crankshaft/arm64/lithium-codegen-arm64.cc - Issue 2031493002: Revert of Provide a tagged allocation top pointer.

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Unified Diff: src/crankshaft/arm64/lithium-codegen-arm64.cc

Issue 2031493002: Revert of Provide a tagged allocation top pointer. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master

Patch Set: Created 4 years, 7 months ago

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Index: src/crankshaft/arm64/lithium-codegen-arm64.cc

diff --git a/src/crankshaft/arm64/lithium-codegen-arm64.cc b/src/crankshaft/arm64/lithium-codegen-arm64.cc

index 9bfa3e3f76375ba7cfc99b758534364418ade9b5..507520497d0f76915e0debe70f2b29f0125de181 100644

--- a/src/crankshaft/arm64/lithium-codegen-arm64.cc

+++ b/src/crankshaft/arm64/lithium-codegen-arm64.cc

@@ -1502,8 +1502,10 @@

ExternalReference allocation_top =

AllocationUtils::GetAllocationTopReference(isolate(), allocation_flags);

+ __ Sub(x0, x0, Operand(kHeapObjectTag));

__ Mov(top_address, Operand(allocation_top));

__ Str(x0, MemOperand(top_address));

+ __ Add(x0, x0, Operand(kHeapObjectTag));

}