MIPS: First step to cleanup the power-of-2 mess.

src/mips64/macro-assembler-mips64.cc

Index: src/mips64/macro-assembler-mips64.cc
diff --git a/src/mips64/macro-assembler-mips64.cc b/src/mips64/macro-assembler-mips64.cc
index 0c490dd5f1801e1a975e5f118fef7a646e4c8613..1038999141adcfbc817705631156f387ce5eca9a 100644
--- a/src/mips64/macro-assembler-mips64.cc
+++ b/src/mips64/macro-assembler-mips64.cc
@@ -4868,7 +4868,7 @@ void MacroAssembler::EnterExitFrame(bool save_doubles,
   DCHECK(stack_space >= 0);
   Dsubu(sp, sp, Operand((stack_space + 2) * kPointerSize));
   if (frame_alignment > 0) {
-    DCHECK(IsPowerOf2(frame_alignment));
+    DCHECK(base::bits::IsPowerOfTwo32(frame_alignment));
     And(sp, sp, Operand(-frame_alignment));  // Align stack.
   }
 
@@ -4966,7 +4966,7 @@ void MacroAssembler::AssertStackIsAligned() {
 
       if (frame_alignment > kPointerSize) {
         Label alignment_as_expected;
-        DCHECK(IsPowerOf2(frame_alignment));
+        DCHECK(base::bits::IsPowerOfTwo32(frame_alignment));
         andi(at, sp, frame_alignment_mask);
         Branch(&alignment_as_expected, eq, at, Operand(zero_reg));
         // Don't use Check here, as it will call Runtime_Abort re-entering here.
@@ -5430,7 +5430,7 @@ void MacroAssembler::PrepareCallCFunction(int num_reg_arguments,
     // and the original value of sp.
     mov(scratch, sp);
     Dsubu(sp, sp, Operand((stack_passed_arguments + 1) * kPointerSize));
-    DCHECK(IsPowerOf2(frame_alignment));
+    DCHECK(base::bits::IsPowerOfTwo32(frame_alignment));
     And(sp, sp, Operand(-frame_alignment));
     sd(scratch, MemOperand(sp, stack_passed_arguments * kPointerSize));
   } else {
@@ -5487,7 +5487,7 @@ void MacroAssembler::CallCFunctionHelper(Register function,
     int frame_alignment = base::OS::ActivationFrameAlignment();
     int frame_alignment_mask = frame_alignment - 1;
     if (frame_alignment > kPointerSize) {
-      DCHECK(IsPowerOf2(frame_alignment));
+      DCHECK(base::bits::IsPowerOfTwo32(frame_alignment));
       Label alignment_as_expected;
       And(at, sp, Operand(frame_alignment_mask));
       Branch(&alignment_as_expected, eq, at, Operand(zero_reg));