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/PowerPC/PPCRegisterInfo.cpp b/lib/Target/PowerPC/PPCRegisterInfo.cpp
index a788a75..19780a8 100644
--- a/lib/Target/PowerPC/PPCRegisterInfo.cpp
+++ b/lib/Target/PowerPC/PPCRegisterInfo.cpp
@@ -248,7 +248,8 @@ void PPCRegisterInfo::reMaterialize(MachineBasicBlock &MBB,
   MBB.insert(I, MI);
 }
 
-const unsigned* PPCRegisterInfo::getCalleeSavedRegs() const {
+const unsigned* PPCRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF)
+                                                                         const {
   // 32-bit Darwin calling convention. 
   static const unsigned Macho32_CalleeSavedRegs[] = {
               PPC::R13, PPC::R14, PPC::R15,
@@ -324,7 +325,7 @@ const unsigned* PPCRegisterInfo::getCalleeSavedRegs() const {
 }
 
 const TargetRegisterClass* const*
-PPCRegisterInfo::getCalleeSavedRegClasses() const {
+PPCRegisterInfo::getCalleeSavedRegClasses(const MachineFunction *MF) const {
   // 32-bit Macho calling convention. 
   static const TargetRegisterClass * const Macho32_CalleeSavedRegClasses[] = {
                        &PPC::GPRCRegClass,&PPC::GPRCRegClass,&PPC::GPRCRegClass,
diff --git a/lib/Target/PowerPC/PPCRegisterInfo.h b/lib/Target/PowerPC/PPCRegisterInfo.h
index 0caf106..4112034 100644
--- a/lib/Target/PowerPC/PPCRegisterInfo.h
+++ b/lib/Target/PowerPC/PPCRegisterInfo.h
@@ -57,9 +57,10 @@ public:
   virtual MachineInstr* foldMemoryOperand(MachineInstr* MI, 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;