[v8-dev] ARM: Improve Lithium register constraints.

src/arm/lithium-arm.h

Index: src/arm/lithium-arm.h
diff --git a/src/arm/lithium-arm.h b/src/arm/lithium-arm.h
index d81dc0f57cde1ea708f7a582e3d2fb830571752a..1a6ac3f126fa0d5d3a4ef84d1eb578f6f01c0889 100644
--- a/src/arm/lithium-arm.h
+++ b/src/arm/lithium-arm.h
@@ -666,17 +666,15 @@ class LMathFloorOfDiv: public LTemplateInstruction<1, 2, 1> {
 };
 
 
-class LMulI: public LTemplateInstruction<1, 2, 1> {
+class LMulI: public LTemplateInstruction<1, 2, 0> {
  public:
-  LMulI(LOperand* left, LOperand* right, LOperand* temp) {
+  LMulI(LOperand* left, LOperand* right) {
     inputs_[0] = left;
     inputs_[1] = right;
-    temps_[0] = temp;
   }
 
   LOperand* left() { return inputs_[0]; }
   LOperand* right() { return inputs_[1]; }
-  LOperand* temp() { return temps_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(MulI, "mul-i")
   DECLARE_HYDROGEN_ACCESSOR(Mul)
@@ -2677,11 +2675,13 @@ class LChunkBuilder BASE_EMBEDDED {
   // An input operand in a register that may be trashed.
   MUST_USE_RESULT LOperand* UseTempRegister(HValue* value);
 
-  // An input operand in a register or stack slot.
+  // An input operand in a register or stack slot. It can be
+  // a stack slot iff the value use count is 1.
   MUST_USE_RESULT LOperand* Use(HValue* value);
   MUST_USE_RESULT LOperand* UseAtStart(HValue* value);
 
   // An input operand in a register, stack slot or a constant operand.
+  // It can be a stack slot iff the value use count is 1.
   MUST_USE_RESULT LOperand* UseOrConstant(HValue* value);
   MUST_USE_RESULT LOperand* UseOrConstantAtStart(HValue* value);