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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39855 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 6 insertions, 4 deletions

diff --git a/lib/Target/IA64/IA64RegisterInfo.cpp b/lib/Target/IA64/IA64RegisterInfo.cpp
index 41a15fd..08327f2 100644
--- a/lib/Target/IA64/IA64RegisterInfo.cpp
+++ b/lib/Target/IA64/IA64RegisterInfo.cpp
@@ -102,7 +102,8 @@ void IA64RegisterInfo::reMaterialize(MachineBasicBlock &MBB,
   MBB.insert(I, MI);
 }
 
-const unsigned* IA64RegisterInfo::getCalleeSavedRegs() const {
+const unsigned* IA64RegisterInfo::getCalleeSavedRegs(const MachineFunction *MF)
+                                                                         const {
   static const unsigned CalleeSavedRegs[] = {
     IA64::r5,  0
   };
@@ -110,7 +111,7 @@ const unsigned* IA64RegisterInfo::getCalleeSavedRegs() const {
 }
 
 const TargetRegisterClass* const*
-IA64RegisterInfo::getCalleeSavedRegClasses() const {
+IA64RegisterInfo::getCalleeSavedRegClasses(const MachineFunction *MF) const {
   static const TargetRegisterClass * const CalleeSavedRegClasses[] = {
     &IA64::GRRegClass,  0
   };
diff --git a/lib/Target/IA64/IA64RegisterInfo.h b/lib/Target/IA64/IA64RegisterInfo.h
index d90f321..162ad5a 100644
--- a/lib/Target/IA64/IA64RegisterInfo.h
+++ b/lib/Target/IA64/IA64RegisterInfo.h
@@ -47,9 +47,10 @@ struct IA64RegisterInfo : public IA64GenRegisterInfo {
   void reMaterialize(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
                      unsigned DestReg, const MachineInstr *Orig) 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;