PPC: [turbofan] Run everything after representation selection concurrently.

src/ppc/macro-assembler-ppc.h

Index: src/ppc/macro-assembler-ppc.h
diff --git a/src/ppc/macro-assembler-ppc.h b/src/ppc/macro-assembler-ppc.h
index 6624998a0f7c234a04d9c1d3c4b064fc6d049453..0c31f618a33e7ec3de97221a21b56be866ac6fd7 100644
--- a/src/ppc/macro-assembler-ppc.h
+++ b/src/ppc/macro-assembler-ppc.h
@@ -19,6 +19,7 @@ const Register kReturnRegister1 = {Register::kCode_r4};
 const Register kReturnRegister2 = {Register::kCode_r5};
 const Register kJSFunctionRegister = {Register::kCode_r4};
 const Register kContextRegister = {Register::kCode_r30};
+const Register kAllocateSizeRegister = {Register::kCode_r4};
 const Register kInterpreterAccumulatorRegister = {Register::kCode_r3};
 const Register kInterpreterBytecodeOffsetRegister = {Register::kCode_r15};
 const Register kInterpreterBytecodeArrayRegister = {Register::kCode_r16};