src/x64/ic-x64.cc - Issue 17895002: The check for internalized strings relied on the fact that we had less

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Unified Diff: src/x64/ic-x64.cc

Issue 17895002: The check for internalized strings relied on the fact that we had less (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge

Patch Set: More comments Created 7 years, 6 months ago

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Index: src/x64/ic-x64.cc

diff --git a/src/x64/ic-x64.cc b/src/x64/ic-x64.cc

index ce91eff5351148bd0f3d9c4db9ff4dd7cf7368fd..82112a0bea0fbe0b055edf64198b33bbc0c462a2 100644

--- a/src/x64/ic-x64.cc

+++ b/src/x64/ic-x64.cc

@@ -337,7 +337,8 @@ static void GenerateKeyNameCheck(MacroAssembler* masm,

__ testl(hash, Immediate(Name::kContainsCachedArrayIndexMask));

__ j(zero, index_string); // The value in hash is used at jump target.

- // Is the string internalized?

+ // Is the string internalized? We already know it's a string so a single

+ // bit test is enough.

STATIC_ASSERT(kInternalizedTag != 0);

__ testb(FieldOperand(map, Map::kInstanceTypeOffset),

Immediate(kIsInternalizedMask));

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