[llvm] r203934 - x86: getCalleeSavedRegs() would crash on 0 (so don't default to it)

[Duncan P. N. Exon Smith]

Author: dexonsmith
Date: Fri Mar 14 10:38:12 2014
New Revision: 203934

URL: http://llvm.org/viewvc/llvm-project?rev=203934&view=rev
Log:
x86: getCalleeSavedRegs() would crash on 0 (so don't default to it)

The current logic assumes that MF is not 0.  Assert that it isn't, and
remove the default of 0 from the header.

Modified:
    llvm/trunk/lib/Target/X86/X86RegisterInfo.cpp
    llvm/trunk/lib/Target/X86/X86RegisterInfo.h

Modified: llvm/trunk/lib/Target/X86/X86RegisterInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86RegisterInfo.cpp?rev=203934&r1=203933&r2=203934&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86RegisterInfo.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86RegisterInfo.cpp Fri Mar 14 10:38:12 2014
@@ -237,6 +237,7 @@ X86RegisterInfo::getCalleeSavedRegs(cons
   bool HasAVX = TM.getSubtarget<X86Subtarget>().hasAVX();
   bool HasAVX512 = TM.getSubtarget<X86Subtarget>().hasAVX512();
 
+  assert(MF && "MachineFunction required");
   switch (MF->getFunction()->getCallingConv()) {
   case CallingConv::GHC:
   case CallingConv::HiPE:

Modified: llvm/trunk/lib/Target/X86/X86RegisterInfo.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86RegisterInfo.h?rev=203934&r1=203933&r2=203934&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86RegisterInfo.h (original)
+++ llvm/trunk/lib/Target/X86/X86RegisterInfo.h Fri Mar 14 10:38:12 2014
@@ -101,7 +101,7 @@ public:
   /// getCalleeSavedRegs - Return a null-terminated list of all of the
   /// callee-save registers on this target.
   const uint16_t *
-  getCalleeSavedRegs(const MachineFunction* MF = 0) const override;
+  getCalleeSavedRegs(const MachineFunction* MF) const override;
   const uint32_t *getCallPreservedMask(CallingConv::ID) const override;
   const uint32_t *getNoPreservedMask() const;