runtime/vm/assembler_arm.cc - Issue 313083008: Add LoadTaggedClassIdMayBeSmi to assembly and improve performance of inline cache stubs.

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Unified Diff: runtime/vm/assembler_arm.cc

Issue 313083008: Add LoadTaggedClassIdMayBeSmi to assembly and improve performance of inline cache stubs. (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/

Patch Set: Created 6 years, 6 months ago

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Index: runtime/vm/assembler_arm.cc

===================================================================

--- runtime/vm/assembler_arm.cc (revision 37007)

+++ runtime/vm/assembler_arm.cc (working copy)

@@ -1685,6 +1685,14 @@

}

+void Assembler::LoadTaggedClassIdMayBeSmi(Register result, Register object) {

+ tst(object, Operand(kSmiTagMask));

+ LoadImmediate(result, Smi::RawValue(kSmiCid), EQ);

+ LoadClassId(result, object, NE);

+ SmiTag(result, NE);

static bool CanEncodeBranchOffset(int32_t offset) {

ASSERT(Utils::IsAligned(offset, 4));

return Utils::IsInt(Utils::CountOneBits(kBranchOffsetMask), offset);

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