[llvm] r327779 - [AArch64] Skip an unnecessary getCopyToReg in DYNAMIC_STACKALLOC

[Martin Storsjo via llvm-commits]

Author: mstorsjo
Date: Sat Mar 17 13:08:48 2018
New Revision: 327779

URL: http://llvm.org/viewvc/llvm-project?rev=327779&view=rev
Log:
[AArch64] Skip an unnecessary getCopyToReg in DYNAMIC_STACKALLOC

Differential Revision: https://reviews.llvm.org/D44586

Modified:
    llvm/trunk/lib/Target/AArch64/AArch64ISelLowering.cpp

Modified: llvm/trunk/lib/Target/AArch64/AArch64ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/AArch64/AArch64ISelLowering.cpp?rev=327779&r1=327778&r2=327779&view=diff
==============================================================================
--- llvm/trunk/lib/Target/AArch64/AArch64ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/AArch64/AArch64ISelLowering.cpp Sat Mar 17 13:08:48 2018
@@ -7527,13 +7527,10 @@ AArch64TargetLowering::LowerDYNAMIC_STAC
   SDValue SP = DAG.getCopyFromReg(Chain, dl, AArch64::SP, MVT::i64);
   Chain = SP.getValue(1);
   SP = DAG.getNode(ISD::SUB, dl, MVT::i64, SP, Size);
-  Chain = DAG.getCopyToReg(Chain, dl, AArch64::SP, SP);
-
-  if (Align) {
+  if (Align)
     SP = DAG.getNode(ISD::AND, dl, VT, SP.getValue(0),
                      DAG.getConstant(-(uint64_t)Align, dl, VT));
-    Chain = DAG.getCopyToReg(Chain, dl, AArch64::SP, SP);
-  }
+  Chain = DAG.getCopyToReg(Chain, dl, AArch64::SP, SP);
 
   Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(0, dl, true),
                              DAG.getIntPtrConstant(0, dl, true), SDValue(), dl);