[turbofan] Run everything after representation selection concurrently.

src/arm/interface-descriptors-arm.cc

Index: src/arm/interface-descriptors-arm.cc
diff --git a/src/arm/interface-descriptors-arm.cc b/src/arm/interface-descriptors-arm.cc
index 0dc240b598a19996bf606cad11fb6adaf2d7282c..72409225eb95c32ddf0b6bef15444100c9367a8a 100644
--- a/src/arm/interface-descriptors-arm.cc
+++ b/src/arm/interface-descriptors-arm.cc
@@ -249,7 +249,7 @@ SIMD128_TYPES(SIMD128_ALLOC_DESC)
 
 void AllocateDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {r0};
+  Register registers[] = {r1};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }