From cd828618b8c6ec58df94aec0f5546f009f2fd0d5 Mon Sep 17 00:00:00 2001
From: Evan Cheng <evan.cheng@apple.com>
Date: Thu, 18 Jun 2009 23:14:30 +0000
Subject: [PATCH] Remove UseThumbBacktraces. Just check if subtarget is darwin.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73734 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM/ARMISelLowering.cpp | 2 +-
 lib/Target/ARM/ARMRegisterInfo.cpp | 7 +++----
 lib/Target/ARM/ARMRegisterInfo.td  | 4 ++--
 lib/Target/ARM/ARMSubtarget.cpp    | 5 +----
 lib/Target/ARM/ARMSubtarget.h      | 4 ----
 5 files changed, 7 insertions(+), 15 deletions(-)

diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index 975eb239c90..943a4203c19 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -1483,7 +1483,7 @@ SDValue ARMTargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) {
   MVT VT = Op.getValueType();
   DebugLoc dl = Op.getDebugLoc();  // FIXME probably not meaningful
   unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
-  unsigned FrameReg = (Subtarget->isThumb() || Subtarget->useThumbBacktraces())
+  unsigned FrameReg = (Subtarget->isThumb() || Subtarget->isTargetDarwin())
     ? ARM::R7 : ARM::R11;
   SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
   while (Depth--)
diff --git a/lib/Target/ARM/ARMRegisterInfo.cpp b/lib/Target/ARM/ARMRegisterInfo.cpp
index 71137dd75fe..bbc13001ae5 100644
--- a/lib/Target/ARM/ARMRegisterInfo.cpp
+++ b/lib/Target/ARM/ARMRegisterInfo.cpp
@@ -159,7 +159,7 @@ ARMRegisterInfo::ARMRegisterInfo(const TargetInstrInfo &tii,
                                  const ARMSubtarget &sti)
   : ARMGenRegisterInfo(ARM::ADJCALLSTACKDOWN, ARM::ADJCALLSTACKUP),
     TII(tii), STI(sti),
-    FramePtr((STI.useThumbBacktraces() || STI.isThumb()) ? ARM::R7 : ARM::R11) {
+    FramePtr((STI.isTargetDarwin() || STI.isThumb()) ? ARM::R7 : ARM::R11) {
 }
 
 static inline
@@ -1687,9 +1687,8 @@ unsigned ARMRegisterInfo::getRARegister() const {
 
 unsigned ARMRegisterInfo::getFrameRegister(MachineFunction &MF) const {
   if (STI.isTargetDarwin() || hasFP(MF))
-    return (STI.useThumbBacktraces() || STI.isThumb()) ? ARM::R7 : ARM::R11;
-  else
-    return ARM::SP;
+    return FramePtr;
+  return ARM::SP;
 }
 
 unsigned ARMRegisterInfo::getEHExceptionRegister() const {
diff --git a/lib/Target/ARM/ARMRegisterInfo.td b/lib/Target/ARM/ARMRegisterInfo.td
index ebe7d582a66..d864079f85e 100644
--- a/lib/Target/ARM/ARMRegisterInfo.td
+++ b/lib/Target/ARM/ARMRegisterInfo.td
@@ -134,7 +134,7 @@ def GPR : RegisterClass<"ARM", [i32], 32, [R0, R1, R2, R3, R4, R5, R6,
     GPRClass::allocation_order_begin(const MachineFunction &MF) const {
       const TargetMachine &TM = MF.getTarget();
       const ARMSubtarget &Subtarget = TM.getSubtarget<ARMSubtarget>();
-      if (Subtarget.useThumbBacktraces()) {
+      if (Subtarget.isTargetDarwin()) {
         if (Subtarget.isR9Reserved())
           return ARM_GPR_AO_4;
         else
@@ -154,7 +154,7 @@ def GPR : RegisterClass<"ARM", [i32], 32, [R0, R1, R2, R3, R4, R5, R6,
       const ARMSubtarget &Subtarget = TM.getSubtarget<ARMSubtarget>();
       GPRClass::iterator I;
 
-      if (Subtarget.useThumbBacktraces()) {
+      if (Subtarget.isTargetDarwin()) {
         if (Subtarget.isR9Reserved()) {
           I = ARM_GPR_AO_4 + (sizeof(ARM_GPR_AO_4)/sizeof(unsigned));
         } else {
diff --git a/lib/Target/ARM/ARMSubtarget.cpp b/lib/Target/ARM/ARMSubtarget.cpp
index a978380b627..7ac7b4923d6 100644
--- a/lib/Target/ARM/ARMSubtarget.cpp
+++ b/lib/Target/ARM/ARMSubtarget.cpp
@@ -24,7 +24,6 @@ ARMSubtarget::ARMSubtarget(const Module &M, const std::string &FS,
   , ARMFPUType(None)
   , IsThumb(isThumb)
   , ThumbMode(Thumb1)
-  , UseThumbBacktraces(false)
   , IsR9Reserved(false)
   , stackAlignment(4)
   , CPUString("generic")
@@ -83,8 +82,6 @@ ARMSubtarget::ARMSubtarget(const Module &M, const std::string &FS,
   if (isAAPCS_ABI())
     stackAlignment = 8;
 
-  if (isTargetDarwin()) {
-    UseThumbBacktraces = true;
+  if (isTargetDarwin())
     IsR9Reserved = true;
-  }
 }
diff --git a/lib/Target/ARM/ARMSubtarget.h b/lib/Target/ARM/ARMSubtarget.h
index 6e750d06635..c365750d071 100644
--- a/lib/Target/ARM/ARMSubtarget.h
+++ b/lib/Target/ARM/ARMSubtarget.h
@@ -48,9 +48,6 @@ protected:
   /// ThumbMode - Indicates supported Thumb version.
   ThumbTypeEnum ThumbMode;
 
-  /// UseThumbBacktraces - True if we use thumb style backtraces.
-  bool UseThumbBacktraces;
-
   /// IsR9Reserved - True if R9 is a not available as general purpose register.
   bool IsR9Reserved;
 
@@ -109,7 +106,6 @@ protected:
   bool isThumb1Only() const { return IsThumb && (ThumbMode == Thumb1); }
   bool hasThumb2() const { return IsThumb && (ThumbMode >= Thumb2); }
 
-  bool useThumbBacktraces() const { return UseThumbBacktraces; }
   bool isR9Reserved() const { return IsR9Reserved; }
 
   const std::string & getCPUString() const { return CPUString; }