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

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Unified Diff: runtime/vm/flow_graph_compiler_mips.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/flow_graph_compiler_mips.cc

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

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

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

@@ -1272,20 +1272,11 @@

ASSERT(!arguments_descriptor.IsNull() && (arguments_descriptor.Length() > 0));

const MegamorphicCache& cache =

MegamorphicCache::ZoneHandle(table->Lookup(name, arguments_descriptor));

- Label not_smi, load_cache;

__ TraceSimMsg("MegamorphicInstanceCall");

__ lw(T0, Address(SP, (argument_count - 1) * kWordSize));

- __ andi(CMPRES1, T0, Immediate(kSmiTagMask));

- __ bne(CMPRES1, ZR, &not_smi);

- __ LoadImmediate(T0, Smi::RawValue(kSmiCid));

- __ b(&load_cache);

+ __ LoadTaggedClassIdMayBeSmi(T0, T0);

- __ Bind(&not_smi);

- __ LoadClassId(T0, T0);

- __ SmiTag(T0);

// T0: class ID of the receiver (smi).

- __ Bind(&load_cache);

__ LoadObject(T1, cache);

__ lw(T2, FieldAddress(T1, MegamorphicCache::buckets_offset()));

__ lw(T1, FieldAddress(T1, MegamorphicCache::mask_offset()));

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