PPC: [calls] Consistent call protocol for calls.

src/ppc/macro-assembler-ppc.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <assert.h>  // For assert
 #include <limits.h>  // For LONG_MIN, LONG_MAX.
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/base/bits.h"
@@ skipping 970 matching lines @@
   // passed in registers.
 
   // ARM has some sanity checks as per below, considering add them for PPC
   //  DCHECK(actual.is_immediate() || actual.reg().is(r3));
   //  DCHECK(expected.is_immediate() || expected.reg().is(r5));
   //  DCHECK((!code_constant.is_null() && code_reg.is(no_reg))
   //          || code_reg.is(r6));
 
   if (expected.is_immediate()) {
     DCHECK(actual.is_immediate());
+    mov(r3, Operand(actual.immediate()));
     if (expected.immediate() == actual.immediate()) {
       definitely_matches = true;
     } else {
-      mov(r3, Operand(actual.immediate()));
       const int sentinel = SharedFunctionInfo::kDontAdaptArgumentsSentinel;
       if (expected.immediate() == sentinel) {
         // Don't worry about adapting arguments for builtins that
         // don't want that done. Skip adaption code by making it look
         // like we have a match between expected and actual number of
         // arguments.
         definitely_matches = true;
       } else {
         *definitely_mismatches = true;
         mov(r5, Operand(expected.immediate()));
       }
     }
   } else {
     if (actual.is_immediate()) {
+      mov(r3, Operand(actual.immediate()));
       cmpi(expected.reg(), Operand(actual.immediate()));
       beq(&regular_invoke);
-      mov(r3, Operand(actual.immediate()));
     } else {
       cmp(expected.reg(), actual.reg());
       beq(&regular_invoke);
     }
   }
 
   if (!definitely_matches) {
     if (!code_constant.is_null()) {
       mov(r6, Operand(code_constant));
       addi(r6, r6, Operand(Code::kHeaderSize - kHeapObjectTag));
@@ skipping 3387 matching lines @@
   }
   if (mag.shift > 0) srawi(result, result, mag.shift);
   ExtractBit(r0, dividend, 31);
   add(result, result, r0);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC