A64: Use a scope utility to allocate scratch registers.

src/a64/macro-assembler-a64-inl.h

Index: src/a64/macro-assembler-a64-inl.h
diff --git a/src/a64/macro-assembler-a64-inl.h b/src/a64/macro-assembler-a64-inl.h
index 590ba8c734a7fac5f37e9b3fbada880f7cfb9792..8d9c2715c350ef451400bc3ed64fd9b26052a0b3 100644
--- a/src/a64/macro-assembler-a64-inl.h
+++ b/src/a64/macro-assembler-a64-inl.h
@@ -588,7 +588,8 @@ void MacroAssembler::Fcmp(const FPRegister& fn, const FPRegister& fm) {
 void MacroAssembler::Fcmp(const FPRegister& fn, double value) {
   ASSERT(allow_macro_instructions_);
   if (value != 0.0) {
-    FPRegister tmp = AppropriateTempFor(fn);
+    UseScratchRegisterScope temps(this);
+    FPRegister tmp = temps.AcquireSameSizeAs(fn);
     Fmov(tmp, value);
     fcmp(fn, tmp);
   } else {
@@ -742,16 +743,19 @@ void MacroAssembler::Fmov(FPRegister fd, double imm) {
     // These cases can be handled by the Assembler.
     fmov(fd, imm);
   } else {
+    UseScratchRegisterScope temps(this);
     // TODO(all): The Assembler would try to relocate the immediate with
     // Assembler::ldr(const FPRegister& ft, double imm) but it is not
     // implemented yet.
     if (fd.SizeInBits() == kDRegSize) {
-      Mov(Tmp0(), double_to_rawbits(imm));
-      Fmov(fd, Tmp0());
+      Register tmp = temps.AcquireX();
+      Mov(tmp, double_to_rawbits(imm));
+      Fmov(fd, tmp);
     } else {
       ASSERT(fd.SizeInBits() == kSRegSize);
-      Mov(WTmp0(), float_to_rawbits(static_cast<float>(imm)));
-      Fmov(fd, WTmp0());
+      Register tmp = temps.AcquireW();
+      Mov(tmp, float_to_rawbits(static_cast<float>(imm)));
+      Fmov(fd, tmp);
     }
   }
 }
@@ -1351,9 +1355,11 @@ void MacroAssembler::JumpIfBothSmi(Register value1,
                                    Label* both_smi_label,
                                    Label* not_smi_label) {
   STATIC_ASSERT((kSmiTagSize == 1) && (kSmiTag == 0));
+  UseScratchRegisterScope temps(this);
+  Register tmp = temps.AcquireX();
   // Check if both tag bits are clear.
-  Orr(Tmp0(), value1, value2);
-  JumpIfSmi(Tmp0(), both_smi_label, not_smi_label);
+  Orr(tmp, value1, value2);
+  JumpIfSmi(tmp, both_smi_label, not_smi_label);
 }
 
 
@@ -1362,9 +1368,11 @@ void MacroAssembler::JumpIfEitherSmi(Register value1,
                                      Label* either_smi_label,
                                      Label* not_smi_label) {
   STATIC_ASSERT((kSmiTagSize == 1) && (kSmiTag == 0));
+  UseScratchRegisterScope temps(this);
+  Register tmp = temps.AcquireX();
   // Check if either tag bit is clear.
-  And(Tmp0(), value1, value2);
-  JumpIfSmi(Tmp0(), either_smi_label, not_smi_label);
+  And(tmp, value1, value2);
+  JumpIfSmi(tmp, either_smi_label, not_smi_label);
 }
 
 
@@ -1437,8 +1445,10 @@ void MacroAssembler::IsObjectJSStringType(Register object,
 
 
 void MacroAssembler::Push(Handle<Object> handle) {
-  Mov(Tmp0(), Operand(handle));
-  Push(Tmp0());
+  UseScratchRegisterScope temps(this);
+  Register tmp = temps.AcquireX();
+  Mov(tmp, Operand(handle));
+  Push(tmp);
 }