Revision: 22586
Author: [email protected]
Date: Thu Jul 24 09:12:34 2014 UTC
Log: X87: Only to the relevant checks in LoadFunctionPrototype
port r22550.
original commit message:
Only to the relevant checks in LoadFunctionPrototype
BUG=
[email protected]
Review URL: https://codereview.chromium.org/410223002
Patch from Chunyang Dai <[email protected]>.
http://code.google.com/p/v8/source/detail?r=22586
Modified:
/branches/bleeding_edge/src/x87/macro-assembler-x87.cc
=======================================
--- /branches/bleeding_edge/src/x87/macro-assembler-x87.cc Tue Jul 15
09:46:10 2014 UTC
+++ /branches/bleeding_edge/src/x87/macro-assembler-x87.cc Thu Jul 24
09:12:34 2014 UTC
@@ -1869,27 +1869,27 @@
Register scratch,
Label* miss,
bool miss_on_bound_function) {
- // Check that the receiver isn't a smi.
- JumpIfSmi(function, miss);
+ Label non_instance;
+ if (miss_on_bound_function) {
+ // Check that the receiver isn't a smi.
+ JumpIfSmi(function, miss);
- // Check that the function really is a function.
- CmpObjectType(function, JS_FUNCTION_TYPE, result);
- j(not_equal, miss);
+ // Check that the function really is a function.
+ CmpObjectType(function, JS_FUNCTION_TYPE, result);
+ j(not_equal, miss);
- if (miss_on_bound_function) {
// If a bound function, go to miss label.
mov(scratch,
FieldOperand(function, JSFunction::kSharedFunctionInfoOffset));
BooleanBitTest(scratch, SharedFunctionInfo::kCompilerHintsOffset,
SharedFunctionInfo::kBoundFunction);
j(not_zero, miss);
+
+ // Make sure that the function has an instance prototype.
+ movzx_b(scratch, FieldOperand(result, Map::kBitFieldOffset));
+ test(scratch, Immediate(1 << Map::kHasNonInstancePrototype));
+ j(not_zero, &non_instance);
}
-
- // Make sure that the function has an instance prototype.
- Label non_instance;
- movzx_b(scratch, FieldOperand(result, Map::kBitFieldOffset));
- test(scratch, Immediate(1 << Map::kHasNonInstancePrototype));
- j(not_zero, &non_instance);
// Get the prototype or initial map from the function.
mov(result,
@@ -1908,12 +1908,15 @@
// Get the prototype from the initial map.
mov(result, FieldOperand(result, Map::kPrototypeOffset));
- jmp(&done);
+
+ if (miss_on_bound_function) {
+ jmp(&done);
- // Non-instance prototype: Fetch prototype from constructor field
- // in initial map.
- bind(&non_instance);
- mov(result, FieldOperand(result, Map::kConstructorOffset));
+ // Non-instance prototype: Fetch prototype from constructor field
+ // in initial map.
+ bind(&non_instance);
+ mov(result, FieldOperand(result, Map::kConstructorOffset));
+ }
// All done.
bind(&done);
--
--
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