PPC: Clean up register save/restore logic.

src/ppc/regexp-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 "src/v8.h"
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/base/bits.h"
 #include "src/code-stubs.h"
@@ skipping 153 matching lines @@
     __ StoreP(r3, register_location(reg), r0);
   }
 }
 
 
 void RegExpMacroAssemblerPPC::Backtrack() {
   CheckPreemption();
   // Pop Code* offset from backtrack stack, add Code* and jump to location.
   Pop(r3);
   __ add(r3, r3, code_pointer());
-  __ mtctr(r3);
-  __ bctr();
+  __ Jump(r3);
 }
 
 
 void RegExpMacroAssemblerPPC::Bind(Label* label) { __ bind(label); }
 
 
 void RegExpMacroAssemblerPPC::CheckCharacter(uint32_t c, Label* on_equal) {
   __ Cmpli(current_character(), Operand(c), r0);
   BranchOrBacktrack(eq, on_equal);
 }
@@ skipping 641 matching lines @@
     if (global()) {
       __ LoadP(r3, MemOperand(frame_pointer(), kSuccessfulCaptures));
     }
 
     __ bind(&return_r3);
     // Skip sp past regexp registers and local variables..
     __ mr(sp, frame_pointer());
     // Restore registers r25..r31 and return (restoring lr to pc).
     __ MultiPop(registers_to_retain);
     __ pop(r0);
-    __ mtctr(r0);
-    __ bctr();
+    __ mtlr(r0);
+    __ blr();
 
     // Backtrack code (branch target for conditional backtracks).
     if (backtrack_label_.is_linked()) {
       __ bind(&backtrack_label_);
       Backtrack();
     }
 
     Label exit_with_exception;
 
     // Preempt-code
@@ skipping 397 matching lines @@
 }
 
 
 #undef __
 
 #endif  // V8_INTERPRETED_REGEXP
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC