Merge bleeding_edge 17696:18016.

src/ia32/lithium-ia32.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1392 matching lines @@
   LOperand* context = UseFixed(instr->context(), esi);
   LOperand* constructor = UseFixed(instr->constructor(), edi);
   LCallNewArray* result = new(zone()) LCallNewArray(context, constructor);
   return MarkAsCall(DefineFixed(result, eax), instr);
 }
 
 
 LInstruction* LChunkBuilder::DoCallFunction(HCallFunction* instr) {
   LOperand* context = UseFixed(instr->context(), esi);
   LOperand* function = UseFixed(instr->function(), edi);
-  LCallFunction* result = new(zone()) LCallFunction(context, function);
-  return MarkAsCall(DefineFixed(result, eax), instr);
+  LCallFunction* call = new(zone()) LCallFunction(context, function);
+  LInstruction* result = DefineFixed(call, eax);
+  if (instr->IsTailCall()) return result;
+  return MarkAsCall(result, instr);
 }
 
 
 LInstruction* LChunkBuilder::DoCallRuntime(HCallRuntime* instr) {
   LOperand* context = UseFixed(instr->context(), esi);
   return MarkAsCall(DefineFixed(new(zone()) LCallRuntime(context), eax), instr);
 }
 
 
 LInstruction* LChunkBuilder::DoRor(HRor* instr) {
@@ skipping 124 matching lines @@
     if (instr->HasPowerOf2Divisor()) {
       ASSERT(!right->CanBeZero());
       LModI* mod = new(zone()) LModI(UseRegisterAtStart(left),
                                      UseOrConstant(right),
                                      NULL);
       LInstruction* result = DefineSameAsFirst(mod);
       return (left->CanBeNegative() &&
               instr->CheckFlag(HValue::kBailoutOnMinusZero))
           ? AssignEnvironment(result)
           : result;
-    } else if (instr->fixed_right_arg().has_value) {
-      LModI* mod = new(zone()) LModI(UseRegister(left),
-                                     UseRegisterAtStart(right),
-                                     NULL);
       return AssignEnvironment(DefineSameAsFirst(mod));
     } else {
       // The temporary operand is necessary to ensure that right is not
       // allocated into edx.
       LModI* mod = new(zone()) LModI(UseFixed(left, eax),
                                      UseRegister(right),
                                      FixedTemp(edx));
       LInstruction* result = DefineFixed(mod, edx);
       return (right->CanBeZero() ||
               (left->RangeCanInclude(kMinInt) &&
@@ skipping 117 matching lines @@
   LOperand* left = UseFixedDouble(instr->left(), xmm2);
   LOperand* right = exponent_type.IsDouble() ?
       UseFixedDouble(instr->right(), xmm1) :
       UseFixed(instr->right(), eax);
   LPower* result = new(zone()) LPower(left, right);
   return MarkAsCall(DefineFixedDouble(result, xmm3), instr,
                     CAN_DEOPTIMIZE_EAGERLY);
 }
 
 
-LInstruction* LChunkBuilder::DoRandom(HRandom* instr) {
-  ASSERT(instr->representation().IsDouble());
-  ASSERT(instr->global_object()->representation().IsTagged());
-  LOperand* global_object = UseTempRegister(instr->global_object());
-  LOperand* scratch = TempRegister();
-  LOperand* scratch2 = TempRegister();
-  LOperand* scratch3 = TempRegister();
-  LRandom* result = new(zone()) LRandom(
-      global_object, scratch, scratch2, scratch3);
-  return DefineFixedDouble(result, xmm1);
-}
-
-
 LInstruction* LChunkBuilder::DoCompareGeneric(HCompareGeneric* instr) {
   ASSERT(instr->left()->representation().IsSmiOrTagged());
   ASSERT(instr->right()->representation().IsSmiOrTagged());
   LOperand* context = UseFixed(instr->context(), esi);
   LOperand* left = UseFixed(instr->left(), edx);
   LOperand* right = UseFixed(instr->right(), eax);
   LCmpT* result = new(zone()) LCmpT(context, left, right);
   return MarkAsCall(DefineFixed(result, eax), instr);
 }
 
@@ skipping 160 matching lines @@
 }
 
 
 LInstruction* LChunkBuilder::DoSeqStringGetChar(HSeqStringGetChar* instr) {
   LOperand* string = UseRegisterAtStart(instr->string());
   LOperand* index = UseRegisterOrConstantAtStart(instr->index());
   return DefineAsRegister(new(zone()) LSeqStringGetChar(string, index));
 }
 
 
+LOperand* LChunkBuilder::GetSeqStringSetCharOperand(HSeqStringSetChar* instr) {
+  if (instr->encoding() == String::ONE_BYTE_ENCODING) {
+    if (FLAG_debug_code) {
+      return UseFixed(instr->value(), eax);
+    } else {
+      return UseFixedOrConstant(instr->value(), eax);
+    }
+  } else {
+    if (FLAG_debug_code) {
+      return UseRegisterAtStart(instr->value());
+    } else {
+      return UseRegisterOrConstantAtStart(instr->value());
+    }
+  }
+}
+
+
 LInstruction* LChunkBuilder::DoSeqStringSetChar(HSeqStringSetChar* instr) {
   LOperand* string = UseRegisterAtStart(instr->string());
-  LOperand* index = UseRegisterOrConstantAtStart(instr->index());
-  LOperand* value = (instr->encoding() == String::ONE_BYTE_ENCODING)
-      ? UseFixedOrConstant(instr->value(), eax)
-      : UseRegisterOrConstantAtStart(instr->value());
-  return new(zone()) LSeqStringSetChar(string, index, value);
+  LOperand* index = FLAG_debug_code
+      ? UseRegisterAtStart(instr->index())
+      : UseRegisterOrConstantAtStart(instr->index());
+  LOperand* value = GetSeqStringSetCharOperand(instr);
+  LOperand* context = FLAG_debug_code ? UseFixed(instr->context(), esi) : NULL;
+  LInstruction* result = new(zone()) LSeqStringSetChar(context, string,
+                                                       index, value);
+  if (FLAG_debug_code) {
+    result = MarkAsCall(result, instr);
+  }
+  return result;
 }
 
 
 LInstruction* LChunkBuilder::DoBoundsCheck(HBoundsCheck* instr) {
   return AssignEnvironment(new(zone()) LBoundsCheck(
       UseRegisterOrConstantAtStart(instr->index()),
       UseAtStart(instr->length())));
 }
 
 
@@ skipping 737 matching lines @@
 
 LInstruction* LChunkBuilder::DoTypeof(HTypeof* instr) {
   LOperand* context = UseFixed(instr->context(), esi);
   LOperand* value = UseAtStart(instr->value());
   LTypeof* result = new(zone()) LTypeof(context, value);
   return MarkAsCall(DefineFixed(result, eax), instr);
 }
 
 
 LInstruction* LChunkBuilder::DoTypeofIsAndBranch(HTypeofIsAndBranch* instr) {
+  LInstruction* goto_instr = CheckElideControlInstruction(instr);
+  if (goto_instr != NULL) return goto_instr;
   return new(zone()) LTypeofIsAndBranch(UseTempRegister(instr->value()));
 }
 
 
 LInstruction* LChunkBuilder::DoIsConstructCallAndBranch(
     HIsConstructCallAndBranch* instr) {
   return new(zone()) LIsConstructCallAndBranch(TempRegister());
 }
 
 
@@ skipping 96 matching lines @@
 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
   LOperand* object = UseRegister(instr->object());
   LOperand* index = UseTempRegister(instr->index());
   return DefineSameAsFirst(new(zone()) LLoadFieldByIndex(object, index));
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32