[WinEH] Mark funclet entries and exits as clobbering all registers

Summary:
In this implementation, LiveIntervalAnalysis invents a few register
masks on basic block boundaries that preserve no registers. The nice
thing about this is that it prevents the prologue inserter from thinking
it needs to spill all XMM CSRs, because it doesn't see any explicit
physreg defs in the MI.

Reviewers: MatzeB, qcolombet, JosephTremoulet, majnemer

Subscribers: MatzeB, llvm-commits

Differential Revision: http://reviews.llvm.org/D14407

llvm-svn: 252318

3 files changed, 3 insertions, 3 deletions

diff --git a/llvm/lib/Target/ARM/ARMBaseRegisterInfo.h b/llvm/lib/Target/ARM/ARMBaseRegisterInfo.h
index d4b7c7be865..cea8b80c782 100644
--- a/llvm/lib/Target/ARM/ARMBaseRegisterInfo.h
+++ b/llvm/lib/Target/ARM/ARMBaseRegisterInfo.h
@@ -94,7 +94,7 @@ public:
   const MCPhysReg *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;
 
   /// getThisReturnPreservedMask - Returns a call preserved mask specific to the
   /// case that 'returned' is on an i32 first argument if the calling convention
diff --git a/llvm/lib/Target/PowerPC/PPCRegisterInfo.h b/llvm/lib/Target/PowerPC/PPCRegisterInfo.h
index 743ac53108b..1b1e160d836 100644
--- a/llvm/lib/Target/PowerPC/PPCRegisterInfo.h
+++ b/llvm/lib/Target/PowerPC/PPCRegisterInfo.h
@@ -77,7 +77,7 @@ public:
   const MCPhysReg *getCalleeSavedRegs(const MachineFunction *MF) const override;
   const uint32_t *getCallPreservedMask(const MachineFunction &MF,
                                        CallingConv::ID CC) const override;
-  const uint32_t *getNoPreservedMask() const;
+  const uint32_t *getNoPreservedMask() const override;
 
   void adjustStackMapLiveOutMask(uint32_t *Mask) const override;
 
diff --git a/llvm/lib/Target/X86/X86RegisterInfo.h b/llvm/lib/Target/X86/X86RegisterInfo.h
index f18d4d203bc..c20842b25de 100644
--- a/llvm/lib/Target/X86/X86RegisterInfo.h
+++ b/llvm/lib/Target/X86/X86RegisterInfo.h
@@ -96,7 +96,7 @@ 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;
 
   /// getReservedRegs - Returns a bitset indexed by physical register number
   /// indicating if a register is a special register that has particular uses and