Changeset 94802 in webkit for trunk/Source/JavaScriptCore/bytecode/CodeBlock.cpp

Timestamp:

Sep 8, 2011, 2:38:04 PM (14 years ago)

Author:

[email protected]

Message:

Value profling and execution count profiling is performed even for
code that cannot be optimized
​https://bugs.webkit.org/show_bug.cgi?id=67694

Reviewed by Gavin Barraclough.

This is a 2% speed-up on V8 when tiered compilation is enabled.

• JavaScriptCore.xcodeproj/project.pbxproj:
• bytecode/CodeBlock.cpp:

(JSC::ProgramCodeBlock::canCompileWithDFG):
(JSC::EvalCodeBlock::canCompileWithDFG):
(JSC::FunctionCodeBlock::canCompileWithDFG):

• bytecode/CodeBlock.h:
• dfg/DFGCapabilities.cpp: Added.

(JSC::DFG::canCompileOpcodes):

• dfg/DFGCapabilities.h: Added.

(JSC::DFG::mightCompileEval):
(JSC::DFG::mightCompileProgram):
(JSC::DFG::mightCompileFunctionForCall):
(JSC::DFG::mightCompileFunctionForConstruct):
(JSC::DFG::canCompileOpcode):
(JSC::DFG::canCompileEval):
(JSC::DFG::canCompileProgram):
(JSC::DFG::canCompileFunctionForCall):
(JSC::DFG::canCompileFunctionForConstruct):

• jit/JIT.cpp:

(JSC::JIT::emitOptimizationCheck):
(JSC::JIT::privateCompile):

• jit/JIT.h:

(JSC::JIT::shouldEmitProfiling):

• jit/JITInlineMethods.h:

(JSC::JIT::emitValueProfilingSite):

File:

• trunk/Source/JavaScriptCore/bytecode/CodeBlock.cpp (modified) (2 diffs)

trunk/Source/JavaScriptCore/bytecode/CodeBlock.cpp

@@ -32 +32 @@
 
 #include "BytecodeGenerator.h"
+#include "DFGCapabilities.h"
 #include "Debugger.h"
 #include "Interpreter.h"
@@ -1931 +1932 @@
     return error;
 }
+
+bool ProgramCodeBlock::canCompileWithDFG()
+{
+    return DFG::canCompileProgram(this);
+}
+
+bool EvalCodeBlock::canCompileWithDFG()
+{
+    return DFG::canCompileEval(this);
+}
+
+bool FunctionCodeBlock::canCompileWithDFG()
+{
+    if (m_isConstructor)
+        return DFG::canCompileFunctionForConstruct(this);
+    return DFG::canCompileFunctionForCall(this);
+}
 #endif