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

src/ia32/fast-codegen-ia32.h

+// 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
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef V8_FAST_CODEGEN_IA32_H_
+#define V8_FAST_CODEGEN_IA32_H_
+
+#include "v8.h"
+
+#include "ast.h"
+#include "compiler.h"
+#include "list.h"
+
+namespace v8 {
+namespace internal {
+
+class FastCodeGenSyntaxChecker: public AstVisitor {
+ public:
+  explicit FastCodeGenSyntaxChecker()
+      : info_(NULL), has_supported_syntax_(true) {
+  }
+
+  void Check(CompilationInfo* info);
+
+  CompilationInfo* info() { return info_; }
+  bool has_supported_syntax() { return has_supported_syntax_; }
+
+ private:
+  void VisitDeclarations(ZoneList<Declaration*>* decls);
+  void VisitStatements(ZoneList<Statement*>* stmts);
+
+  // AST node visit functions.
+#define DECLARE_VISIT(type) virtual void Visit##type(type* node);
+  AST_NODE_LIST(DECLARE_VISIT)
+#undef DECLARE_VISIT
+
+  CompilationInfo* info_;
+  bool has_supported_syntax_;
+
+  DISALLOW_COPY_AND_ASSIGN(FastCodeGenSyntaxChecker);
+};
+
+
+class FastCodeGenerator: public AstVisitor {
+ public:
+  explicit FastCodeGenerator(MacroAssembler* masm)
+      : masm_(masm), info_(NULL), destination_(no_reg), smi_bits_(0) {
+  }
+
+  static Handle<Code> MakeCode(CompilationInfo* info);
+
+  void Generate(CompilationInfo* compilation_info);
+
+ private:
+  MacroAssembler* masm() { return masm_; }
+  CompilationInfo* info() { return info_; }
+
+  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 receiver_reg.
+  void EmitLoadReceiver();
+
+  // 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 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_;
+
+  DISALLOW_COPY_AND_ASSIGN(FastCodeGenerator);
+};
+
+
+} }  // namespace v8::internal
+
+#endif  // V8_FAST_CODEGEN_IA32_H_