From: Evan Cheng <evan.cheng@apple.com>
Date: Fri, 7 Aug 2009 19:34:35 +0000 (+0000)
Subject: Use 16-bit tMOVgpr2gpr instead of tMOVr to copy GPR registers in Thumb2 mode.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e118cb614643c568716ee612366cae4c365a8aa3;p=oota-llvm.git

Use 16-bit tMOVgpr2gpr instead of tMOVr to copy GPR registers in Thumb2 mode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78398 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/ARM/README-Thumb2.txt b/lib/Target/ARM/README-Thumb2.txt
index 48b52781228..6a51e7ce820 100644
--- a/lib/Target/ARM/README-Thumb2.txt
+++ b/lib/Target/ARM/README-Thumb2.txt
@@ -3,5 +3,3 @@
 //===---------------------------------------------------------------------===//
 
 We should be using ADD / SUB rd, sp, rm <shift> instructions.
-
-copyRegToReg should use tMOVgpr2gpr instead of t2MOVr?
diff --git a/lib/Target/ARM/Thumb2InstrInfo.cpp b/lib/Target/ARM/Thumb2InstrInfo.cpp
index 2b329e03db3..783e65053b2 100644
--- a/lib/Target/ARM/Thumb2InstrInfo.cpp
+++ b/lib/Target/ARM/Thumb2InstrInfo.cpp
@@ -65,12 +65,7 @@ Thumb2InstrInfo::copyRegToReg(MachineBasicBlock &MBB,
 
   if (DestRC == ARM::GPRRegisterClass &&
       SrcRC == ARM::GPRRegisterClass) {
-    // FIXME: Just use tMOVgpr2gpr since it's shorter?
-    if (SrcReg == ARM::SP || DestReg == ARM::SP)
-      BuildMI(MBB, I, DL, get(ARM::tMOVgpr2gpr), DestReg).addReg(SrcReg);
-    else
-      AddDefaultCC(AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::t2MOVr),
-                                          DestReg).addReg(SrcReg)));
+    BuildMI(MBB, I, DL, get(ARM::tMOVgpr2gpr), DestReg).addReg(SrcReg);
     return true;
   } else if (DestRC == ARM::GPRRegisterClass &&
              SrcRC == ARM::tGPRRegisterClass) {