Revert of [turbofan] Run everything after representation selection concurrently.

src/x64/builtins-x64.cc

Index: src/x64/builtins-x64.cc
diff --git a/src/x64/builtins-x64.cc b/src/x64/builtins-x64.cc
index c2c61866e4b0535c680acdb7115b5b1c9859b818..478ea193e6383f52c7813442c8429476cc09cd54 100644
--- a/src/x64/builtins-x64.cc
+++ b/src/x64/builtins-x64.cc
@@ -2042,48 +2042,6 @@
   __ PushReturnAddressFrom(rcx);
 }
 
-// static
-void Builtins::Generate_AllocateInNewSpace(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- rdx : requested object size (tagged)
-  //  -- rsi : context
-  // -----------------------------------
-  __ AssertSmi(rdx);
-
-  Label runtime;
-  __ SmiToInteger64(rdx, rdx);
-  __ Allocate(rdx, rax, rcx, rdi, &runtime, NO_ALLOCATION_FLAGS);
-  __ Ret();
-
-  __ bind(&runtime);
-  __ Integer32ToSmi(rdx, rdx);
-  __ PopReturnAddressTo(rcx);
-  __ Push(rdx);
-  __ PushReturnAddressFrom(rcx);
-  __ TailCallRuntime(Runtime::kAllocateInNewSpace);
-}
-
-// static
-void Builtins::Generate_AllocateInOldSpace(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- rdx : requested object size (tagged)
-  //  -- rsi : context
-  // -----------------------------------
-  __ AssertSmi(rdx);
-
-  Label runtime;
-  __ SmiToInteger64(rdx, rdx);
-  __ Allocate(rdx, rax, rcx, rdi, &runtime, PRETENURE);
-  __ Ret();
-
-  __ bind(&runtime);
-  __ Integer32ToSmi(rdx, rdx);
-  __ PopReturnAddressTo(rcx);
-  __ Push(rdx);
-  __ Push(Smi::FromInt(AllocateTargetSpace::encode(OLD_SPACE)));
-  __ PushReturnAddressFrom(rcx);
-  __ TailCallRuntime(Runtime::kAllocateInTargetSpace);
-}
 
 void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
   // ----------- S t a t e -------------