Implemented Support of IA interrupt and exception handlers:

[oota-llvm.git] / lib / Target / X86 / X86RegisterInfo.h

diff --git a/lib/Target/X86/X86RegisterInfo.h b/lib/Target/X86/X86RegisterInfo.h
index b754cadd0eb8926897401089b656fcf43cda3530..c3a2845c36227420292589e4159e9f1e56add253 100644 (file)
--- a/lib/Target/X86/X86RegisterInfo.h
+++ b/lib/Target/X86/X86RegisterInfo.h
@@ -87,6 +87,11 @@ public:
   const TargetRegisterClass *
   getCrossCopyRegClass(const TargetRegisterClass *RC) const override;
 
+  /// getGPRsForTailCall - Returns a register class with registers that can be
+  /// used in forming tail calls.
+  const TargetRegisterClass *
+  getGPRsForTailCall(const MachineFunction &MF) const;
+
   unsigned getRegPressureLimit(const TargetRegisterClass *RC,
                                MachineFunction &MF) const override;
 
@@ -96,7 +101,11 @@ public:
   getCalleeSavedRegs(const MachineFunction* MF) const override;
   const uint32_t *getCallPreservedMask(const MachineFunction &MF,
                                        CallingConv::ID) const override;
-  const uint32_t *getNoPreservedMask() const;
+  const uint32_t *getNoPreservedMask() const override;
+
+  // Calls involved in thread-local variable lookup save more registers than
+  // normal calls, so they need a different mask to represent this.
+  const uint32_t *getDarwinTLSCallPreservedMask() const;
 
   /// getReservedRegs - Returns a bitset indexed by physical register number
   /// indicating if a register is a special register that has particular uses and
@@ -108,9 +117,7 @@ public:
 
   bool hasBasePointer(const MachineFunction &MF) const;
 
-  bool canRealignStack(const MachineFunction &MF) const;
-
-  bool needsStackRealignment(const MachineFunction &MF) const override;
+  bool canRealignStack(const MachineFunction &MF) const override;
 
   bool hasReservedSpillSlot(const MachineFunction &MF, unsigned Reg,
                             int &FrameIdx) const override;
@@ -128,11 +135,16 @@ public:
   unsigned getSlotSize() const { return SlotSize; }
 };
 
-// getX86SubSuperRegister - X86 utility function. It returns the sub or super
-// register of a specific X86 register.
-// e.g. getX86SubSuperRegister(X86::EAX, MVT::i16) return X86:AX
+/// Returns the sub or super register of a specific X86 register.
+/// e.g. getX86SubSuperRegister(X86::EAX, MVT::i16) returns X86::AX.
+/// Aborts on error.
 unsigned getX86SubSuperRegister(unsigned, MVT::SimpleValueType, bool High=false);
 
+/// Returns the sub or super register of a specific X86 register.
+/// Like getX86SubSuperRegister() but returns 0 on error.
+unsigned getX86SubSuperRegisterOrZero(unsigned, MVT::SimpleValueType,
+                                      bool High = false);
+
 //get512BitRegister - X86 utility - returns 512-bit super register
 unsigned get512BitSuperRegister(unsigned Reg);