MIPS: Convert UnaryOpStub to a HydrogenCodeStub.

src/mips/lithium-codegen-mips.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 1953 matching lines @@
 int LCodeGen::GetNextEmittedBlock() const {
   for (int i = current_block_ + 1; i < graph()->blocks()->length(); ++i) {
     if (!chunk_->GetLabel(i)->HasReplacement()) return i;
   }
   return -1;
 }
 
 template<class InstrType>
 void LCodeGen::EmitBranch(InstrType instr,
                           Condition cc, Register src1, const Operand& src2) {
+  int left_block = instr->TrueDestination(chunk_);
   int right_block = instr->FalseDestination(chunk_);
-  int left_block = instr->TrueDestination(chunk_);
 
   int next_block = GetNextEmittedBlock();
-  if (right_block == left_block) {
+  if (right_block == left_block || cc == al) {
     EmitGoto(left_block);
   } else if (left_block == next_block) {
     __ Branch(chunk_->GetAssemblyLabel(right_block),
               NegateCondition(cc), src1, src2);
   } else if (right_block == next_block) {
     __ Branch(chunk_->GetAssemblyLabel(left_block), cc, src1, src2);
   } else {
     __ Branch(chunk_->GetAssemblyLabel(left_block), cc, src1, src2);
     __ Branch(chunk_->GetAssemblyLabel(right_block));
   }
@@ skipping 19 matching lines @@
     __ Branch(chunk_->GetAssemblyLabel(right_block));
   }
 }
 
 
 void LCodeGen::DoDebugBreak(LDebugBreak* instr) {
   __ stop("LDebugBreak");
 }
 
 
+void LCodeGen::DoIsNumberAndBranch(LIsNumberAndBranch* instr) {
+  Representation r = instr->hydrogen()->value()->representation();
+  if (r.IsSmiOrInteger32() || r.IsDouble()) {
+    EmitBranch(instr, al, zero_reg, Operand(zero_reg));
+  } else {
+    ASSERT(r.IsTagged());
+    Register reg = ToRegister(instr->value());
+    HType type = instr->hydrogen()->value()->type();
+    if (type.IsTaggedNumber()) {
+      EmitBranch(instr, al, zero_reg, Operand(zero_reg));
+    }
+    __ JumpIfSmi(reg, instr->TrueLabel(chunk_));
+    __ lw(scratch0(), FieldMemOperand(reg, HeapObject::kMapOffset));
+    __ LoadRoot(at, Heap::kHeapNumberMapRootIndex);
+    EmitBranch(instr, eq, scratch0(), Operand(at));
+  }
+}
+
+
 void LCodeGen::DoBranch(LBranch* instr) {
   Representation r = instr->hydrogen()->value()->representation();
   if (r.IsInteger32() || r.IsSmi()) {
     ASSERT(!info()->IsStub());
     Register reg = ToRegister(instr->value());
     EmitBranch(instr, ne, reg, Operand(zero_reg));
   } else if (r.IsDouble()) {
     ASSERT(!info()->IsStub());
     DoubleRegister reg = ToDoubleRegister(instr->value());
     // Test the double value. Zero and NaN are false.
@@ skipping 3874 matching lines @@
   __ Subu(scratch, result, scratch);
   __ lw(result, FieldMemOperand(scratch,
                                 FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal