ARM64: Slightly improve MacroAssembler::Allocate.

src/arm64/macro-assembler-arm64.cc

Index: src/arm64/macro-assembler-arm64.cc
diff --git a/src/arm64/macro-assembler-arm64.cc b/src/arm64/macro-assembler-arm64.cc
index 70d601b2e6e0399fe4ceabb0ae11ef1e6a094be3..d7f008141e1dca7f1dd6810220a1327535e10e83 100644
--- a/src/arm64/macro-assembler-arm64.cc
+++ b/src/arm64/macro-assembler-arm64.cc
@@ -1537,9 +1537,9 @@ void MacroAssembler::Throw(BailoutReason reason) {
 }
 
 
-void MacroAssembler::ThrowIf(Condition cc, BailoutReason reason) {
+void MacroAssembler::ThrowIf(Condition cond, BailoutReason reason) {
   Label ok;
-  B(InvertCondition(cc), &ok);
+  B(InvertCondition(cond), &ok);
   Throw(reason);
   Bind(&ok);
 }
@@ -3309,8 +3309,7 @@ void MacroAssembler::Allocate(int object_size,
 
   // Calculate new top and bail out if new space is exhausted.
   Adds(scratch3, result, object_size);
-  B(vs, gc_required);
-  Cmp(scratch3, allocation_limit);
+  Ccmp(scratch3, allocation_limit, CFlag, cc);
   B(hi, gc_required);
   Str(scratch3, MemOperand(top_address));
 
@@ -3391,8 +3390,7 @@ void MacroAssembler::Allocate(Register object_size,
     Check(eq, kUnalignedAllocationInNewSpace);
   }
 
-  B(vs, gc_required);
-  Cmp(scratch3, allocation_limit);
+  Ccmp(scratch3, allocation_limit, CFlag, cc);
   B(hi, gc_required);
   Str(scratch3, MemOperand(top_address));