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

Issue 3053042: Modify polymorphic keyed load IC stub to load cached properties from the prop... (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: '' Created 10 years, 4 months ago
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Index: src/x64/ic-x64.cc
===================================================================
--- src/x64/ic-x64.cc (revision 5174)
+++ src/x64/ic-x64.cc (working copy)
@@ -599,7 +599,7 @@
// -- rdx : receiver
// -- rsp[0] : return address
// -----------------------------------
- Label slow, check_string, index_smi, index_string;
+ Label slow, check_string, index_smi, index_string, property_array_property;
Label check_pixel_array, probe_dictionary, check_number_dictionary;
// Check that the key is a smi.
@@ -692,15 +692,14 @@
__ cmpq(rax, Operand(kScratchRegister, rdi, times_1, kPointerSize));
__ j(not_equal, &slow);
- // Get field offset which is a 32-bit integer and check that it is
- // an in-object property.
+ // Get field offset, which is a 32-bit integer.
ExternalReference cache_field_offsets
= ExternalReference::keyed_lookup_cache_field_offsets();
__ movq(kScratchRegister, cache_field_offsets);
__ movl(rdi, Operand(kScratchRegister, rcx, times_4, 0));
__ movzxbq(rcx, FieldOperand(rbx, Map::kInObjectPropertiesOffset));
__ subq(rdi, rcx);
- __ j(above_equal, &slow);
+ __ j(above_equal, &property_array_property);
// Load in-object property.
__ movzxbq(rcx, FieldOperand(rbx, Map::kInstanceSizeOffset));
@@ -709,6 +708,14 @@
__ IncrementCounter(&Counters::keyed_load_generic_lookup_cache, 1);
__ ret(0);
+ // Load property array property.
+ __ bind(&property_array_property);
+ __ movq(rax, FieldOperand(rdx, JSObject::kPropertiesOffset));
+ __ movq(rax, FieldOperand(rax, rdi, times_pointer_size,
+ FixedArray::kHeaderSize));
+ __ IncrementCounter(&Counters::keyed_load_generic_lookup_cache, 1);
+ __ ret(0);
+
// Do a quick inline probe of the receiver's dictionary, if it
// exists.
__ bind(&probe_dictionary);
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