Changeset 175508 in webkit for trunk/Source/JavaScriptCore/llint

Timestamp:

Nov 3, 2014, 7:36:28 PM (11 years ago)

Author:

[email protected]

Message:

Add "get scope" byte code
​https://bugs.webkit.org/show_bug.cgi?id=138326

Reviewed by Mark Lam.

Added op_get_scope. Added implementations for the LLInt and baseline JIT.
Provided nop implementation for DFG and FTL. The new byte code is emitted
after op_enter for any function, program or eval. It is expected that the
DFG will be implemented such that unneeded op_get_scope would be eliminated
during DFG compilation.

• bytecode/BytecodeList.json:
• bytecode/BytecodeUseDef.h:

(JSC::computeUsesForBytecodeOffset):
(JSC::computeDefsForBytecodeOffset):
Added new op_get_scope bytecode.

• bytecompiler/BytecodeGenerator.cpp:

(JSC::BytecodeGenerator::BytecodeGenerator):
(JSC::BytecodeGenerator::emitGetScope):

• bytecompiler/BytecodeGenerator.h:

Emit new op_get_scope bytecode.

• dfg/DFGByteCodeParser.cpp:

(JSC::DFG::ByteCodeParser::parseBlock):

• dfg/DFGCapabilities.cpp:

(JSC::DFG::capabilityLevel):
Added framework for new op_get_scope bytecode.

• bytecode/CodeBlock.cpp:

(JSC::CodeBlock::dumpBytecode):

• jit/JIT.cpp:

(JSC::JIT::privateCompileMainPass):

• jit/JIT.h:
• jit/JITOpcodes.cpp:

(JSC::JIT::emit_op_get_scope):

• jit/JITOpcodes32_64.cpp:

(JSC::JIT::emit_op_get_scope):

• llint/LowLevelInterpreter32_64.asm:
• llint/LowLevelInterpreter64.asm:

Implementation of op_get_scope bytecode.

Location:

trunk/Source/JavaScriptCore/llint

Files:

• LowLevelInterpreter32_64.asm (modified) (1 diff)
• LowLevelInterpreter64.asm (modified) (1 diff)

trunk/Source/JavaScriptCore/llint/LowLevelInterpreter32_64.asm

@@ -724 +724 @@
     loadi 4[PC], t0
     callSlowPath(_llint_slow_path_create_lexical_environment)
+    dispatch(2)
+
+
+_llint_op_get_scope:
+    traceExecution()
+    loadi Callee + PayloadOffset[cfr], t0
+    loadi JSCallee::m_scope[t0], t0
+    loadisFromInstruction(1, t1)
+    storei CellTag, TagOffset[cfr, t1, 8]
+    storei t0, PayloadOffset[cfr, t1, 8]
     dispatch(2)
 

trunk/Source/JavaScriptCore/llint/LowLevelInterpreter64.asm

@@ -612 +612 @@
     loadisFromInstruction(1, t0)
     callSlowPath(_llint_slow_path_create_lexical_environment)
+    dispatch(2)
+
+
+_llint_op_get_scope:
+    traceExecution()
+    loadp Callee[cfr], t0
+    loadp JSCallee::m_scope[t0], t0
+    loadisFromInstruction(1, t1)
+    storeq t0, [cfr, t1, 8]
     dispatch(2)