[turbofan] Run everything after representation selection concurrently.

src/arm/builtins-arm.cc

Index: src/arm/builtins-arm.cc
diff --git a/src/arm/builtins-arm.cc b/src/arm/builtins-arm.cc
index 6cee63307623d79c1b5b57225289b5d18100abc5..e13a0f12a3cc0cc2ae2525c8d890215dc4fac973 100644
--- a/src/arm/builtins-arm.cc
+++ b/src/arm/builtins-arm.cc
@@ -2661,6 +2661,44 @@ void Builtins::Generate_Construct(MacroAssembler* masm) {
           RelocInfo::CODE_TARGET);
 }
 
+// static
+void Builtins::Generate_AllocateInNewSpace(MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  //  -- r1 : requested object size (tagged)
+  //  -- cp : context
+  // -----------------------------------
+  __ AssertSmi(r1);
+
+  Label runtime;
+  __ SmiUntag(r1);
+  __ Allocate(r1, r0, r2, r3, &runtime, NO_ALLOCATION_FLAGS);
+  __ Ret();
+
+  __ bind(&runtime);
+  __ SmiTag(r1);
+  __ Push(r1);
+  __ TailCallRuntime(Runtime::kAllocateInNewSpace);
+}
+
+// static
+void Builtins::Generate_AllocateInOldSpace(MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  //  -- r1 : requested object size (tagged)
+  //  -- cp : context
+  // -----------------------------------
+  __ AssertSmi(r1);
+
+  Label runtime;
+  __ SmiUntag(r1);
+  __ Allocate(r1, r0, r2, r3, &runtime, PRETENURE);
+  __ Ret();
+
+  __ bind(&runtime);
+  __ SmiTag(r1);
+  __ Push(r1);
+  __ Push(Smi::FromInt(AllocateTargetSpace::encode(OLD_SPACE)));
+  __ TailCallRuntime(Runtime::kAllocateInTargetSpace);
+}
 
 void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
   // ----------- S t a t e -------------