Revision: 19508
Author: [email protected]
Date: Thu Feb 20 12:33:58 2014 UTC
Log: Merged r19500 into 3.23 branch.
MIPS: Fix performance regression on sunspider string-unpack-code.
[email protected]
BUG=
Review URL: https://codereview.chromium.org/173703003
http://code.google.com/p/v8/source/detail?r=19508
Modified:
/branches/3.23/src/mips/stub-cache-mips.cc
/branches/3.23/src/version.cc
=======================================
--- /branches/3.23/src/mips/stub-cache-mips.cc Wed Jan 15 18:11:24 2014 UTC
+++ /branches/3.23/src/mips/stub-cache-mips.cc Thu Feb 20 12:33:58 2014 UTC
@@ -2778,10 +2778,11 @@
}
Label number_case;
+ Register match = scratch1();
Label* smi_target = IncludesNumberType(types) ? &number_case : &miss;
- __ JumpIfSmi(receiver(), smi_target);
+ __ JumpIfSmi(receiver(), smi_target, match); // Reg match is 0 if Smi.
- Register map_reg = scratch1();
+ Register map_reg = scratch2();
int receiver_count = types->length();
int number_of_handled_maps = 0;
@@ -2791,12 +2792,15 @@
Handle<Map> map = IC::TypeToMap(*type, isolate());
if (!map->is_deprecated()) {
number_of_handled_maps++;
+ // Check map and tail call if there's a match.
+ // Separate compare from branch, to provide path for above
JumpIfSmi().
+ __ Subu(match, map_reg, Operand(map));
if (type->Is(Type::Number())) {
ASSERT(!number_case.is_unused());
__ bind(&number_case);
}
__ Jump(handlers->at(current), RelocInfo::CODE_TARGET,
- eq, map_reg, Operand(map));
+ eq, match, Operand(zero_reg));
}
}
ASSERT(number_of_handled_maps != 0);
=======================================
--- /branches/3.23/src/version.cc Wed Feb 12 16:03:10 2014 UTC
+++ /branches/3.23/src/version.cc Thu Feb 20 12:33:58 2014 UTC
@@ -35,7 +35,7 @@
#define MAJOR_VERSION 3
#define MINOR_VERSION 23
#define BUILD_NUMBER 17
-#define PATCH_LEVEL 13
+#define PATCH_LEVEL 14
// Use 1 for candidates and 0 otherwise.
// (Boolean macro values are not supported by all preprocessors.)
#define IS_CANDIDATE_VERSION 0
--
--
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