From 1f30dcbd8dcf18cabb4be780fcf492869d5dcab9 Mon Sep 17 00:00:00 2001
From: Jim Grosbach <grosbach@apple.com>
Date: Thu, 8 Oct 2009 01:50:26 +0000
Subject: [PATCH] Cleanup up unused R3LiveIn tracking.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83522 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM/ARMMachineFunctionInfo.h | 12 ++----------
 lib/Target/ARM/Thumb1RegisterInfo.cpp   |  9 ---------
 2 files changed, 2 insertions(+), 19 deletions(-)

diff --git a/lib/Target/ARM/ARMMachineFunctionInfo.h b/lib/Target/ARM/ARMMachineFunctionInfo.h
index 7ae287d56b3..2176b2735a2 100644
--- a/lib/Target/ARM/ARMMachineFunctionInfo.h
+++ b/lib/Target/ARM/ARMMachineFunctionInfo.h
@@ -52,10 +52,6 @@ class ARMFunctionInfo : public MachineFunctionInfo {
   /// enable far jump.
   bool LRSpilledForFarJump;
 
-  /// R3IsLiveIn - True if R3 is live in to this function.
-  /// FIXME: Remove when register scavenger for Thumb is done.
-  bool R3IsLiveIn;
-
   /// FramePtrSpillOffset - If HasStackFrame, this records the frame pointer
   /// spill stack offset.
   unsigned FramePtrSpillOffset;
@@ -100,7 +96,7 @@ public:
     hasThumb2(false),
     Align(2U),
     VarArgsRegSaveSize(0), HasStackFrame(false),
-    LRSpilledForFarJump(false), R3IsLiveIn(false),
+    LRSpilledForFarJump(false),
     FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
     GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
     GPRCS1Frames(0), GPRCS2Frames(0), DPRCSFrames(0),
@@ -111,7 +107,7 @@ public:
     hasThumb2(MF.getTarget().getSubtarget<ARMSubtarget>().hasThumb2()),
     Align(isThumb ? 1U : 2U),
     VarArgsRegSaveSize(0), HasStackFrame(false),
-    LRSpilledForFarJump(false), R3IsLiveIn(false),
+    LRSpilledForFarJump(false),
     FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
     GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
     GPRCS1Frames(32), GPRCS2Frames(32), DPRCSFrames(32),
@@ -134,10 +130,6 @@ public:
   bool isLRSpilledForFarJump() const { return LRSpilledForFarJump; }
   void setLRIsSpilledForFarJump(bool s) { LRSpilledForFarJump = s; }
 
-  // FIXME: Remove when register scavenger for Thumb is done.
-  bool isR3LiveIn() const { return R3IsLiveIn; }
-  void setR3IsLiveIn(bool l) { R3IsLiveIn = l; }
-
   unsigned getFramePtrSpillOffset() const { return FramePtrSpillOffset; }
   void setFramePtrSpillOffset(unsigned o) { FramePtrSpillOffset = o; }
 
diff --git a/lib/Target/ARM/Thumb1RegisterInfo.cpp b/lib/Target/ARM/Thumb1RegisterInfo.cpp
index c8a0b15c572..3c896da4c0c 100644
--- a/lib/Target/ARM/Thumb1RegisterInfo.cpp
+++ b/lib/Target/ARM/Thumb1RegisterInfo.cpp
@@ -671,15 +671,6 @@ void Thumb1RegisterInfo::emitPrologue(MachineFunction &MF) const {
   DebugLoc dl = (MBBI != MBB.end() ?
                  MBBI->getDebugLoc() : DebugLoc::getUnknownLoc());
 
-  // Check if R3 is live in. It might have to be used as a scratch register.
-  for (MachineRegisterInfo::livein_iterator I =MF.getRegInfo().livein_begin(),
-         E = MF.getRegInfo().livein_end(); I != E; ++I) {
-    if (I->first == ARM::R3) {
-      AFI->setR3IsLiveIn(true);
-      break;
-    }
-  }
-
   // Thumb add/sub sp, imm8 instructions implicitly multiply the offset by 4.
   NumBytes = (NumBytes + 3) & ~3;
   MFI->setStackSize(NumBytes);
-- 
2.34.1