Merge revision 3813 to 3930 from bleeding_edge to partial snapshots branch.

src/fast-codegen.h

Index: src/fast-codegen.h
===================================================================
--- src/fast-codegen.h	(revision 3935)
+++ src/fast-codegen.h	(working copy)
@@ -28,10 +28,15 @@
 #ifndef V8_FAST_CODEGEN_H_
 #define V8_FAST_CODEGEN_H_
 
+#if V8_TARGET_ARCH_IA32
+#include "ia32/fast-codegen-ia32.h"
+#else
+
 #include "v8.h"
 
 #include "ast.h"
 #include "compiler.h"
+#include "list.h"
 
 namespace v8 {
 namespace internal {
@@ -65,7 +70,9 @@
 
 class FastCodeGenerator: public AstVisitor {
  public:
-  explicit FastCodeGenerator(MacroAssembler* masm) : masm_(masm), info_(NULL) {}
+  explicit FastCodeGenerator(MacroAssembler* masm)
+      : masm_(masm), info_(NULL), destination_(no_reg), smi_bits_(0) {
+  }
 
   static Handle<Code> MakeCode(CompilationInfo* info);
 
@@ -74,47 +81,80 @@
  private:
   MacroAssembler* masm() { return masm_; }
   CompilationInfo* info() { return info_; }
-  Label* bailout() { return &bailout_; }
 
+  Register destination() { return destination_; }
+  void set_destination(Register reg) { destination_ = reg; }
+
   FunctionLiteral* function() { return info_->function(); }
   Scope* scope() { return info_->scope(); }
 
+  // Platform-specific fixed registers, all guaranteed distinct.
+  Register accumulator0();
+  Register accumulator1();
+  Register scratch0();
+  Register scratch1();
+  Register receiver_reg();
+  Register context_reg();
+
+  Register other_accumulator(Register reg) {
+    ASSERT(reg.is(accumulator0()) || reg.is(accumulator1()));
+    return (reg.is(accumulator0())) ? accumulator1() : accumulator0();
+  }
+
+  // Flags are true if the respective register is statically known to hold a
+  // smi.  We do not track every register, only the accumulator registers.
+  bool is_smi(Register reg) {
+    ASSERT(!reg.is(no_reg));
+    return (smi_bits_ & reg.bit()) != 0;
+  }
+  void set_as_smi(Register reg) {
+    ASSERT(!reg.is(no_reg));
+    smi_bits_ = smi_bits_ | reg.bit();
+  }
+  void clear_as_smi(Register reg) {
+    ASSERT(!reg.is(no_reg));
+    smi_bits_ = smi_bits_ & ~reg.bit();
+  }
+
   // AST node visit functions.
 #define DECLARE_VISIT(type) virtual void Visit##type(type* node);
   AST_NODE_LIST(DECLARE_VISIT)
 #undef DECLARE_VISIT
 
-  // Emit code to load the receiver from the stack into a given register.
-  void EmitLoadReceiver(Register reg);
+  // Emit code to load the receiver from the stack into receiver_reg.
+  void EmitLoadReceiver();
 
-  // Emit code to check that the receiver has the same map as the
-  // compile-time receiver.  Receiver is expected in {ia32-edx, x64-rdx,
-  // arm-r1}.  Emit a branch to the (single) bailout label if check fails.
-  void EmitReceiverMapCheck();
-
-  // Emit code to check that the global object has the same map as the
-  // global object seen at compile time.
-  void EmitGlobalMapCheck();
-
-  // Emit code to load a global variable directly from a global
-  // property cell into {ia32-eax, x64-rax, arm-r0}.
+  // Emit code to load a global variable directly from a global property
+  // cell into the destination register.
   void EmitGlobalVariableLoad(Handle<Object> cell);
 
   // Emit a store to an own property of this.  The stored value is expected
-  // in {ia32-eax, x64-rax, arm-r0} and the receiver in {is32-edx, x64-rdx,
-  // arm-r1}.  Both are preserve.
+  // in accumulator0 and the receiver in receiver_reg.  The receiver
+  // register is preserved and the result (the stored value) is left in the
+  // destination register.
   void EmitThisPropertyStore(Handle<String> name);
 
+  // Emit a load from an own property of this.  The receiver is expected in
+  // receiver_reg.  The receiver register is preserved and the result is
+  // left in the destination register.
+  void EmitThisPropertyLoad(Handle<String> name);
+
+  // Emit a bitwise or operation.  The left operand is in accumulator1 and
+  // the right is in accumulator0.  The result should be left in the
+  // destination register.
+  void EmitBitOr();
+
   MacroAssembler* masm_;
-
   CompilationInfo* info_;
+  Register destination_;
+  uint32_t smi_bits_;
 
-  Label bailout_;
-
   DISALLOW_COPY_AND_ASSIGN(FastCodeGenerator);
 };
 
 
 } }  // namespace v8::internal
 
+#endif  // V8_TARGET_ARCH_IA32
+
 #endif  // V8_FAST_CODEGEN_H_