Reorder code in fast-codegen-ia32.cc.

src/ia32/fast-codegen-ia32.cc

 // Copyright 2010 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 449 matching lines @@
   if (cgen.HasStackOverflow()) {
     ASSERT(!Top::has_pending_exception());
     return Handle<Code>::null();
   }
 
   Code::Flags flags = Code::ComputeFlags(Code::FUNCTION, NOT_IN_LOOP);
   return CodeGenerator::MakeCodeEpilogue(&masm, flags, info);
 }
 
 
+Register FastCodeGenerator::accumulator0() { return eax; }
+Register FastCodeGenerator::accumulator1() { return edx; }
+Register FastCodeGenerator::scratch0() { return ecx; }
+Register FastCodeGenerator::scratch1() { return edi; }
+Register FastCodeGenerator::receiver_reg() { return ebx; }
+Register FastCodeGenerator::context_reg() { return esi; }
+
+
+void FastCodeGenerator::EmitLoadReceiver() {
+  // Offset 2 is due to return address and saved frame pointer.
+  int index = 2 + function()->scope()->num_parameters();
+  __ mov(receiver_reg(), Operand(ebp, index * kPointerSize));
+}
+
+
+void FastCodeGenerator::EmitGlobalVariableLoad(Handle<Object> cell) {
+  ASSERT(!destination().is(no_reg));
+  ASSERT(cell->IsJSGlobalPropertyCell());
+
+  __ mov(destination(), Immediate(cell));
+  __ mov(destination(),
+         FieldOperand(destination(), JSGlobalPropertyCell::kValueOffset));
+  if (FLAG_debug_code) {
+    __ cmp(destination(), Factory::the_hole_value());
+    __ Check(not_equal, "DontDelete cells can't contain the hole");
+  }
+
+  // The loaded value is not known to be a smi.
+  clear_as_smi(destination());
+}
+
+
+void FastCodeGenerator::EmitThisPropertyStore(Handle<String> name) {
+  LookupResult lookup;
+  info()->receiver()->Lookup(*name, &lookup);
+
+  ASSERT(lookup.holder() == *info()->receiver());
+  ASSERT(lookup.type() == FIELD);
+  Handle<Map> map(Handle<HeapObject>::cast(info()->receiver())->map());
+  int index = lookup.GetFieldIndex() - map->inobject_properties();
+  int offset = index * kPointerSize;
+
+  // We will emit the write barrier unless the stored value is statically
+  // known to be a smi.
+  bool needs_write_barrier = !is_smi(accumulator0());
+
+  // Perform the store.  Negative offsets are inobject properties.
+  if (offset < 0) {
+    offset += map->instance_size();
+    __ mov(FieldOperand(receiver_reg(), offset), accumulator0());
+    if (needs_write_barrier) {
+      // Preserve receiver from write barrier.
+      __ mov(scratch0(), receiver_reg());
+    }
+  } else {
+    offset += FixedArray::kHeaderSize;
+    __ mov(scratch0(),
+           FieldOperand(receiver_reg(), JSObject::kPropertiesOffset));
+    __ mov(FieldOperand(scratch0(), offset), accumulator0());
+  }
+
+  if (needs_write_barrier) {
+    if (destination().is(no_reg)) {
+      // After RecordWrite accumulator0 is only accidently a smi, but it is
+      // already marked as not known to be one.
+      __ RecordWrite(scratch0(), offset, accumulator0(), scratch1());
+    } else {
+      // Copy the value to the other accumulator to preserve a copy from the
+      // write barrier. One of the accumulators is available as a scratch
+      // register.  Neither is a smi.
+      __ mov(accumulator1(), accumulator0());
+      clear_as_smi(accumulator1());
+      Register value_scratch = other_accumulator(destination());
+      __ RecordWrite(scratch0(), offset, value_scratch, scratch1());
+    }
+  } else if (destination().is(accumulator1())) {
+    __ mov(accumulator1(), accumulator0());
+    // Is a smi because we do not need the write barrier.
+    set_as_smi(accumulator1());
+  }
+}
+
+
+void FastCodeGenerator::EmitThisPropertyLoad(Handle<String> name) {
+  ASSERT(!destination().is(no_reg));
+  LookupResult lookup;
+  info()->receiver()->Lookup(*name, &lookup);
+
+  ASSERT(lookup.holder() == *info()->receiver());
+  ASSERT(lookup.type() == FIELD);
+  Handle<Map> map(Handle<HeapObject>::cast(info()->receiver())->map());
+  int index = lookup.GetFieldIndex() - map->inobject_properties();
+  int offset = index * kPointerSize;
+
+  // Perform the load.  Negative offsets are inobject properties.
+  if (offset < 0) {
+    offset += map->instance_size();
+    __ mov(destination(), FieldOperand(receiver_reg(), offset));
+  } else {
+    offset += FixedArray::kHeaderSize;
+    __ mov(scratch0(),
+           FieldOperand(receiver_reg(), JSObject::kPropertiesOffset));
+    __ mov(destination(), FieldOperand(scratch0(), offset));
+  }
+
+  // The loaded value is not known to be a smi.
+  clear_as_smi(destination());
+}
+
+
+void FastCodeGenerator::EmitBitOr() {
+  if (is_smi(accumulator0()) && is_smi(accumulator1())) {
+    // If both operands are known to be a smi then there is no need to check
+    // the operands or result.  There is no need to perform the operation in
+    // an effect context.
+    if (!destination().is(no_reg)) {
+      // Leave the result in the destination register.  Bitwise or is
+      // commutative.
+      __ or_(destination(), Operand(other_accumulator(destination())));
+    }
+  } else if (destination().is(no_reg)) {
+    // Result is not needed but do not clobber the operands in case of
+    // bailout.
+    __ mov(scratch0(), accumulator1());
+    __ or_(scratch0(), Operand(accumulator0()));
+    __ test(scratch0(), Immediate(kSmiTagMask));
+    __ j(not_zero, bailout(), not_taken);
+  } else {
+    // Preserve the destination operand in a scratch register in case of
+    // bailout.
+    __ mov(scratch0(), destination());
+    __ or_(destination(), Operand(other_accumulator(destination())));
+    __ test(destination(), Immediate(kSmiTagMask));
+    __ j(not_zero, bailout(), not_taken);
+  }
+
+  // If we didn't bailout, the result (in fact, both inputs too) is known to
+  // be a smi.
+  set_as_smi(accumulator0());
+  set_as_smi(accumulator1());
+}
+
+
+void FastCodeGenerator::Generate(CompilationInfo* compilation_info) {
+  ASSERT(info_ == NULL);
+  info_ = compilation_info;
+
+  // Save the caller's frame pointer and set up our own.
+  Comment prologue_cmnt(masm(), ";; Prologue");
+  __ push(ebp);
+  __ mov(ebp, esp);
+  __ push(esi);  // Context.
+  __ push(edi);  // Closure.
+  // Note that we keep a live register reference to esi (context) at this
+  // point.
+
+  // Receiver (this) is allocated to a fixed register.
+  if (info()->has_this_properties()) {
+    Comment cmnt(masm(), ";; MapCheck(this)");
+    if (FLAG_print_ir) {
+      PrintF("#: MapCheck(this)\n");
+    }
+    ASSERT(info()->has_receiver() && info()->receiver()->IsHeapObject());
+    Handle<HeapObject> object = Handle<HeapObject>::cast(info()->receiver());
+    Handle<Map> map(object->map());
+    EmitLoadReceiver();
+    __ CheckMap(receiver_reg(), map, bailout(), false);
+  }
+
+  // If there is a global variable access check if the global object is the
+  // same as at lazy-compilation time.
+  if (info()->has_globals()) {
+    Comment cmnt(masm(), ";; MapCheck(GLOBAL)");
+    if (FLAG_print_ir) {
+      PrintF("#: MapCheck(GLOBAL)\n");
+    }
+    ASSERT(info()->has_global_object());
+    Handle<Map> map(info()->global_object()->map());
+    __ mov(scratch0(), CodeGenerator::GlobalObject());
+    __ CheckMap(scratch0(), map, bailout(), true);
+  }
+
+  VisitStatements(function()->body());
+
+  Comment return_cmnt(masm(), ";; Return(<undefined>)");
+  if (FLAG_print_ir) {
+    PrintF("#: Return(<undefined>)\n");
+  }
+  __ mov(eax, Factory::undefined_value());
+  __ mov(esp, ebp);
+  __ pop(ebp);
+  __ ret((scope()->num_parameters() + 1) * kPointerSize);
+
+  __ bind(&bailout_);
+}
+
+
 void FastCodeGenerator::VisitDeclaration(Declaration* decl) {
   UNREACHABLE();
 }
 
 
 void FastCodeGenerator::VisitBlock(Block* stmt) {
   VisitStatements(stmt->statements());
 }
 
 
@@ skipping 257 matching lines @@
 
 void FastCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
   UNREACHABLE();
 }
 
 
 void FastCodeGenerator::VisitThisFunction(ThisFunction* expr) {
   UNREACHABLE();
 }
 
-Register FastCodeGenerator::accumulator0() { return eax; }
-Register FastCodeGenerator::accumulator1() { return edx; }
-Register FastCodeGenerator::scratch0() { return ecx; }
-Register FastCodeGenerator::scratch1() { return edi; }
-Register FastCodeGenerator::receiver_reg() { return ebx; }
-Register FastCodeGenerator::context_reg() { return esi; }
-
-
-void FastCodeGenerator::EmitLoadReceiver() {
-  // Offset 2 is due to return address and saved frame pointer.
-  int index = 2 + function()->scope()->num_parameters();
-  __ mov(receiver_reg(), Operand(ebp, index * kPointerSize));
-}
-
-
-void FastCodeGenerator::EmitGlobalVariableLoad(Handle<Object> cell) {
-  ASSERT(!destination().is(no_reg));
-  ASSERT(cell->IsJSGlobalPropertyCell());
-
-  __ mov(destination(), Immediate(cell));
-  __ mov(destination(),
-         FieldOperand(destination(), JSGlobalPropertyCell::kValueOffset));
-  if (FLAG_debug_code) {
-    __ cmp(destination(), Factory::the_hole_value());
-    __ Check(not_equal, "DontDelete cells can't contain the hole");
-  }
-
-  // The loaded value is not known to be a smi.
-  clear_as_smi(destination());
-}
-
-
-void FastCodeGenerator::EmitThisPropertyStore(Handle<String> name) {
-  LookupResult lookup;
-  info()->receiver()->Lookup(*name, &lookup);
-
-  ASSERT(lookup.holder() == *info()->receiver());
-  ASSERT(lookup.type() == FIELD);
-  Handle<Map> map(Handle<HeapObject>::cast(info()->receiver())->map());
-  int index = lookup.GetFieldIndex() - map->inobject_properties();
-  int offset = index * kPointerSize;
-
-  // We will emit the write barrier unless the stored value is statically
-  // known to be a smi.
-  bool needs_write_barrier = !is_smi(accumulator0());
-
-  // Perform the store.  Negative offsets are inobject properties.
-  if (offset < 0) {
-    offset += map->instance_size();
-    __ mov(FieldOperand(receiver_reg(), offset), accumulator0());
-    if (needs_write_barrier) {
-      // Preserve receiver from write barrier.
-      __ mov(scratch0(), receiver_reg());
-    }
-  } else {
-    offset += FixedArray::kHeaderSize;
-    __ mov(scratch0(),
-           FieldOperand(receiver_reg(), JSObject::kPropertiesOffset));
-    __ mov(FieldOperand(scratch0(), offset), accumulator0());
-  }
-
-  if (needs_write_barrier) {
-    if (destination().is(no_reg)) {
-      // After RecordWrite accumulator0 is only accidently a smi, but it is
-      // already marked as not known to be one.
-      __ RecordWrite(scratch0(), offset, accumulator0(), scratch1());
-    } else {
-      // Copy the value to the other accumulator to preserve a copy from the
-      // write barrier. One of the accumulators is available as a scratch
-      // register.  Neither is a smi.
-      __ mov(accumulator1(), accumulator0());
-      clear_as_smi(accumulator1());
-      Register value_scratch = other_accumulator(destination());
-      __ RecordWrite(scratch0(), offset, value_scratch, scratch1());
-    }
-  } else if (destination().is(accumulator1())) {
-    __ mov(accumulator1(), accumulator0());
-    // Is a smi because we do not need the write barrier.
-    set_as_smi(accumulator1());
-  }
-}
-
-
-void FastCodeGenerator::EmitThisPropertyLoad(Handle<String> name) {
-  ASSERT(!destination().is(no_reg));
-  LookupResult lookup;
-  info()->receiver()->Lookup(*name, &lookup);
-
-  ASSERT(lookup.holder() == *info()->receiver());
-  ASSERT(lookup.type() == FIELD);
-  Handle<Map> map(Handle<HeapObject>::cast(info()->receiver())->map());
-  int index = lookup.GetFieldIndex() - map->inobject_properties();
-  int offset = index * kPointerSize;
-
-  // Perform the load.  Negative offsets are inobject properties.
-  if (offset < 0) {
-    offset += map->instance_size();
-    __ mov(destination(), FieldOperand(receiver_reg(), offset));
-  } else {
-    offset += FixedArray::kHeaderSize;
-    __ mov(scratch0(),
-           FieldOperand(receiver_reg(), JSObject::kPropertiesOffset));
-    __ mov(destination(), FieldOperand(scratch0(), offset));
-  }
-
-  // The loaded value is not known to be a smi.
-  clear_as_smi(destination());
-}
-
-
-void FastCodeGenerator::EmitBitOr() {
-  if (is_smi(accumulator0()) && is_smi(accumulator1())) {
-    // If both operands are known to be a smi then there is no need to check
-    // the operands or result.  There is no need to perform the operation in
-    // an effect context.
-    if (!destination().is(no_reg)) {
-      // Leave the result in the destination register.  Bitwise or is
-      // commutative.
-      __ or_(destination(), Operand(other_accumulator(destination())));
-    }
-  } else if (destination().is(no_reg)) {
-    // Result is not needed but do not clobber the operands in case of
-    // bailout.
-    __ mov(scratch0(), accumulator1());
-    __ or_(scratch0(), Operand(accumulator0()));
-    __ test(scratch0(), Immediate(kSmiTagMask));
-    __ j(not_zero, bailout(), not_taken);
-  } else {
-    // Preserve the destination operand in a scratch register in case of
-    // bailout.
-    __ mov(scratch0(), destination());
-    __ or_(destination(), Operand(other_accumulator(destination())));
-    __ test(destination(), Immediate(kSmiTagMask));
-    __ j(not_zero, bailout(), not_taken);
-  }
-
-  // If we didn't bailout, the result (in fact, both inputs too) is known to
-  // be a smi.
-  set_as_smi(accumulator0());
-  set_as_smi(accumulator1());
-}
-
-
-void FastCodeGenerator::Generate(CompilationInfo* compilation_info) {
-  ASSERT(info_ == NULL);
-  info_ = compilation_info;
-
-  // Save the caller's frame pointer and set up our own.
-  Comment prologue_cmnt(masm(), ";; Prologue");
-  __ push(ebp);
-  __ mov(ebp, esp);
-  __ push(esi);  // Context.
-  __ push(edi);  // Closure.
-  // Note that we keep a live register reference to esi (context) at this
-  // point.
-
-  // Receiver (this) is allocated to a fixed register.
-  if (info()->has_this_properties()) {
-    Comment cmnt(masm(), ";; MapCheck(this)");
-    if (FLAG_print_ir) {
-      PrintF("#: MapCheck(this)\n");
-    }
-    ASSERT(info()->has_receiver() && info()->receiver()->IsHeapObject());
-    Handle<HeapObject> object = Handle<HeapObject>::cast(info()->receiver());
-    Handle<Map> map(object->map());
-    EmitLoadReceiver();
-    __ CheckMap(receiver_reg(), map, bailout(), false);
-  }
-
-  // If there is a global variable access check if the global object is the
-  // same as at lazy-compilation time.
-  if (info()->has_globals()) {
-    Comment cmnt(masm(), ";; MapCheck(GLOBAL)");
-    if (FLAG_print_ir) {
-      PrintF("#: MapCheck(GLOBAL)\n");
-    }
-    ASSERT(info()->has_global_object());
-    Handle<Map> map(info()->global_object()->map());
-    __ mov(scratch0(), CodeGenerator::GlobalObject());
-    __ CheckMap(scratch0(), map, bailout(), true);
-  }
-
-  VisitStatements(function()->body());
-
-  Comment return_cmnt(masm(), ";; Return(<undefined>)");
-  if (FLAG_print_ir) {
-    PrintF("#: Return(<undefined>)\n");
-  }
-  __ mov(eax, Factory::undefined_value());
-  __ mov(esp, ebp);
-  __ pop(ebp);
-  __ ret((scope()->num_parameters() + 1) * kPointerSize);
-
-  __ bind(&bailout_);
-}
-
-
 #undef __
 
 
 } }  // namespace v8::internal