Long live the exception handling!

This patch fills the last necessary bits to enable exceptions
handling in LLVM. Currently only on x86-32/linux.

In fact, this patch adds necessary intrinsics (and their lowering) which
represent really weird target-specific gcc builtins used inside unwinder.

After corresponding llvm-gcc patch will land (easy) exceptions should be
more or less workable. However, exceptions handling support should not be 
thought as 'finished': I expect many small and not so small glitches
everywhere.

llvm-svn: 39855

2 files changed, 6 insertions, 4 deletions

diff --git a/llvm/lib/Target/Sparc/SparcRegisterInfo.cpp b/llvm/lib/Target/Sparc/SparcRegisterInfo.cpp
index ded1bcd836a..1981b4fe30b 100644
--- a/llvm/lib/Target/Sparc/SparcRegisterInfo.cpp
+++ b/llvm/lib/Target/Sparc/SparcRegisterInfo.cpp
@@ -121,7 +121,8 @@ MachineInstr *SparcRegisterInfo::foldMemoryOperand(MachineInstr* MI,
   return NewMI;
 }
 
-const unsigned* SparcRegisterInfo::getCalleeSavedRegs() const {
+const unsigned* SparcRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF)
+                                                                         const {
   static const unsigned CalleeSavedRegs[] = { 0 };
   return CalleeSavedRegs;
 }
@@ -143,7 +144,7 @@ BitVector SparcRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
 
 
 const TargetRegisterClass* const*
-SparcRegisterInfo::getCalleeSavedRegClasses() const {
+SparcRegisterInfo::getCalleeSavedRegClasses(const MachineFunction *MF) const {
   static const TargetRegisterClass * const CalleeSavedRegClasses[] = { 0 };
   return CalleeSavedRegClasses;
 }
diff --git a/llvm/lib/Target/Sparc/SparcRegisterInfo.h b/llvm/lib/Target/Sparc/SparcRegisterInfo.h
index b7ea4d6f4c9..451964b2f75 100644
--- a/llvm/lib/Target/Sparc/SparcRegisterInfo.h
+++ b/llvm/lib/Target/Sparc/SparcRegisterInfo.h
@@ -51,9 +51,10 @@ struct SparcRegisterInfo : public SparcGenRegisterInfo {
                                           unsigned OpNum,
                                           int FrameIndex) const;
 
-  const unsigned *getCalleeSavedRegs() const;
+  const unsigned *getCalleeSavedRegs(const MachineFunction *MF = 0) const;
 
-  const TargetRegisterClass* const* getCalleeSavedRegClasses() const;
+  const TargetRegisterClass* const* getCalleeSavedRegClasses(
+                                     const MachineFunction *MF = 0) const;
 
   BitVector getReservedRegs(const MachineFunction &MF) const;