[turbofan] Run everything after representation selection concurrently.

src/ia32/interface-descriptors-ia32.cc

Index: src/ia32/interface-descriptors-ia32.cc
diff --git a/src/ia32/interface-descriptors-ia32.cc b/src/ia32/interface-descriptors-ia32.cc
index 320e31d81be6da9fdb60c1359ee36b140abf9326..e7d073f42bdd41c26ef2c2e21f31fbfbd18d7d16 100644
--- a/src/ia32/interface-descriptors-ia32.cc
+++ b/src/ia32/interface-descriptors-ia32.cc
@@ -253,7 +253,7 @@ SIMD128_TYPES(SIMD128_ALLOC_DESC)
 
 void AllocateDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {eax};
+  Register registers[] = {edx};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }