[llvm] IPRA: Fixes an IPRA compilation failure. (PR #196928)

[Quentin Colombet via llvm-commits]

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@@ -396,6 +396,24 @@ const MCPhysReg *X86RegisterInfo::getCalleeSavedRegsViaCopy(
   return nullptr;
 }
 
+ArrayRef<MCPhysReg>
+X86RegisterInfo::getIntraCallClobberedRegs(const MachineFunction *MF) const {
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qcolombet wrote:

Please add a comment that to be compliant with the x86 ABI we have to assume that anytime a x87 register is defined then all of them are.

https://github.com/llvm/llvm-project/pull/196928