From be01689f43cf6882cf670d33df49ead1f570c53a Mon Sep 17 00:00:00 2001
From: Simon Hausmann <simon.hausmann@nokia.com>
Date: Sun, 27 May 2012 21:51:42 +0200
Subject: Imported WebKit commit 8d6c5efc74f0222dfc7bcce8d845d4a2707ed9e6
 (http://svn.webkit.org/repository/webkit/trunk@118629)

---
 Source/JavaScriptCore/jit/JITOpcodes.cpp      | 22 ++++++++++++++------
 Source/JavaScriptCore/jit/JITOpcodes32_64.cpp | 29 +++++++++++++++++++--------
 2 files changed, 37 insertions(+), 14 deletions(-)

(limited to 'Source/JavaScriptCore/jit')

diff --git a/Source/JavaScriptCore/jit/JITOpcodes.cpp b/Source/JavaScriptCore/jit/JITOpcodes.cpp
index d458f7fb5..aa2938cc2 100644
--- a/Source/JavaScriptCore/jit/JITOpcodes.cpp
+++ b/Source/JavaScriptCore/jit/JITOpcodes.cpp
@@ -1257,10 +1257,14 @@ void JIT::emit_op_init_lazy_reg(Instruction* currentInstruction)
 
 void JIT::emit_op_convert_this(Instruction* currentInstruction)
 {
-    emitGetVirtualRegister(currentInstruction[1].u.operand, regT0);
+    emitGetVirtualRegister(currentInstruction[1].u.operand, regT1);
 
-    emitJumpSlowCaseIfNotJSCell(regT0);
-    addSlowCase(branchPtr(Equal, Address(regT0, JSCell::classInfoOffset()), TrustedImmPtr(&JSString::s_info)));
+    emitJumpSlowCaseIfNotJSCell(regT1);
+    if (shouldEmitProfiling()) {
+        loadPtr(Address(regT1, JSCell::structureOffset()), regT0);
+        emitValueProfilingSite();
+    }
+    addSlowCase(branchPtr(Equal, Address(regT1, JSCell::classInfoOffset()), TrustedImmPtr(&JSString::s_info)));
 }
 
 void JIT::emit_op_create_this(Instruction* currentInstruction)
@@ -1315,15 +1319,21 @@ void JIT::emitSlow_op_convert_this(Instruction* currentInstruction, Vector<SlowC
     void* globalThis = m_codeBlock->globalObject()->globalScopeChain()->globalThis.get();
 
     linkSlowCase(iter);
-    Jump isNotUndefined = branchPtr(NotEqual, regT0, TrustedImmPtr(JSValue::encode(jsUndefined())));
+    if (shouldEmitProfiling())
+        move(TrustedImmPtr(bitwise_cast<void*>(JSValue::encode(jsUndefined()))), regT0);
+    Jump isNotUndefined = branchPtr(NotEqual, regT1, TrustedImmPtr(JSValue::encode(jsUndefined())));
+    emitValueProfilingSite();
     move(TrustedImmPtr(globalThis), regT0);
     emitPutVirtualRegister(currentInstruction[1].u.operand, regT0);
     emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_convert_this));
 
-    isNotUndefined.link(this);
     linkSlowCase(iter);
+    if (shouldEmitProfiling())
+        move(TrustedImmPtr(bitwise_cast<void*>(JSValue::encode(m_globalData->stringStructure.get()))), regT0);
+    isNotUndefined.link(this);
+    emitValueProfilingSite();
     JITStubCall stubCall(this, cti_op_convert_this);
-    stubCall.addArgument(regT0);
+    stubCall.addArgument(regT1);
     stubCall.call(currentInstruction[1].u.operand);
 }
 
diff --git a/Source/JavaScriptCore/jit/JITOpcodes32_64.cpp b/Source/JavaScriptCore/jit/JITOpcodes32_64.cpp
index 5643fe9f3..12e47b2ee 100644
--- a/Source/JavaScriptCore/jit/JITOpcodes32_64.cpp
+++ b/Source/JavaScriptCore/jit/JITOpcodes32_64.cpp
@@ -1548,12 +1548,15 @@ void JIT::emit_op_convert_this(Instruction* currentInstruction)
 {
     unsigned thisRegister = currentInstruction[1].u.operand;
 
-    emitLoad(thisRegister, regT1, regT0);
+    emitLoad(thisRegister, regT3, regT2);
 
-    addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag)));
-    addSlowCase(branchPtr(Equal, Address(regT0, JSCell::classInfoOffset()), TrustedImmPtr(&JSString::s_info)));
-
-    map(m_bytecodeOffset + OPCODE_LENGTH(op_convert_this), thisRegister, regT1, regT0);
+    addSlowCase(branch32(NotEqual, regT3, TrustedImm32(JSValue::CellTag)));
+    if (shouldEmitProfiling()) {
+        loadPtr(Address(regT2, JSCell::structureOffset()), regT0);
+        move(regT3, regT1);
+        emitValueProfilingSite();
+    }
+    addSlowCase(branchPtr(Equal, Address(regT2, JSCell::classInfoOffset()), TrustedImmPtr(&JSString::s_info)));
 }
 
 void JIT::emitSlow_op_convert_this(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
@@ -1562,16 +1565,26 @@ void JIT::emitSlow_op_convert_this(Instruction* currentInstruction, Vector<SlowC
     unsigned thisRegister = currentInstruction[1].u.operand;
 
     linkSlowCase(iter);
-    Jump isNotUndefined = branch32(NotEqual, regT1, TrustedImm32(JSValue::UndefinedTag));
+    if (shouldEmitProfiling()) {
+        move(TrustedImm32(JSValue::UndefinedTag), regT1);
+        move(TrustedImm32(0), regT0);
+    }
+    Jump isNotUndefined = branch32(NotEqual, regT3, TrustedImm32(JSValue::UndefinedTag));
+    emitValueProfilingSite();
     move(TrustedImmPtr(globalThis), regT0);
     move(TrustedImm32(JSValue::CellTag), regT1);
     emitStore(thisRegister, regT1, regT0);
     emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_convert_this));
 
-    isNotUndefined.link(this);
     linkSlowCase(iter);
+    if (shouldEmitProfiling()) {
+        move(TrustedImm32(JSValue::CellTag), regT1);
+        move(TrustedImmPtr(m_globalData->stringStructure.get()), regT0);
+    }
+    isNotUndefined.link(this);
+    emitValueProfilingSite();
     JITStubCall stubCall(this, cti_op_convert_this);
-    stubCall.addArgument(regT1, regT0);
+    stubCall.addArgument(regT3, regT2);
     stubCall.call(thisRegister);
 }
 
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