[llvm-commits] CVS: llvm/lib/Target/ARM/ARMRegisterInfo.cpp ARMRegisterInfo.h

[Evan Cheng]

Changes in directory llvm/lib/Target/ARM:

ARMRegisterInfo.cpp updated: 1.66 -> 1.67
ARMRegisterInfo.h updated: 1.7 -> 1.8
---
Log message:

Added getReservedRegs().

---
Diffs of the changes:  (+17 -0)

 ARMRegisterInfo.cpp |   15 +++++++++++++++
 ARMRegisterInfo.h   |    2 ++
 2 files changed, 17 insertions(+)


Index: llvm/lib/Target/ARM/ARMRegisterInfo.cpp
diff -u llvm/lib/Target/ARM/ARMRegisterInfo.cpp:1.66 llvm/lib/Target/ARM/ARMRegisterInfo.cpp:1.67
--- llvm/lib/Target/ARM/ARMRegisterInfo.cpp:1.66	Wed Feb  7 15:44:33 2007
+++ llvm/lib/Target/ARM/ARMRegisterInfo.cpp	Sat Feb 17 05:06:00 2007
@@ -28,6 +28,7 @@
 #include "llvm/Target/TargetFrameInfo.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Target/TargetOptions.h"
+#include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/STLExtras.h"
 #include <algorithm>
@@ -297,6 +298,20 @@
   return CalleeSavedRegClasses;
 }
 
+BitVector ARMRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
+  BitVector Reserved(getNumRegs());
+  Reserved.set(ARM::SP);
+  if (STI.isTargetDarwin() || hasFP(MF))
+    Reserved.set(FramePtr);
+  // Some targets reserve R9.
+  if (STI.isR9Reserved())
+    Reserved.set(ARM::R9);
+  // At PEI time, if LR is used, it will be spilled upon entry.
+  if (MF.getUsedPhysregs() && !MF.isPhysRegUsed((unsigned)ARM::LR))
+    Reserved.set(ARM::LR);
+  return Reserved;
+}
+
 /// hasFP - Return true if the specified function should have a dedicated frame
 /// pointer register.  This is true if the function has variable sized allocas
 /// or if frame pointer elimination is disabled.


Index: llvm/lib/Target/ARM/ARMRegisterInfo.h
diff -u llvm/lib/Target/ARM/ARMRegisterInfo.h:1.7 llvm/lib/Target/ARM/ARMRegisterInfo.h:1.8
--- llvm/lib/Target/ARM/ARMRegisterInfo.h:1.7	Wed Jan 24 21:07:27 2007
+++ llvm/lib/Target/ARM/ARMRegisterInfo.h	Sat Feb 17 05:06:00 2007
@@ -67,6 +67,8 @@
 
   const TargetRegisterClass* const* getCalleeSavedRegClasses() const;
 
+  BitVector getReservedRegs(const MachineFunction &MF) const;
+
   bool hasFP(const MachineFunction &MF) const;
 
   void eliminateCallFramePseudoInstr(MachineFunction &MF,