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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.

llvm-svn: 203934
This commit is contained in:
Duncan P. N. Exon Smith 2014-03-14 15:38:12 +00:00
parent 576114e676
commit 8f66a3afe0
2 changed files with 2 additions and 1 deletions
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1
llvm/lib/Target/X86/X86RegisterInfo.cpp
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@ -237,6 +237,7 @@ X86RegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
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:

2
llvm/lib/Target/X86/X86RegisterInfo.h
View File

@ -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;