[llvm] [MachineInstr] add insert method for variadic instructions (PR #67699)
Nick Desaulniers via llvm-commits
llvm-commits at lists.llvm.org
Mon Oct 30 11:10:20 PDT 2023
nickdesaulniers wrote:
> Spooky, looks like my newly added tests are failing in presubmit.
> The call to getRegUseDefListHead in MachineRegisterInfo::addRegOperandToUseList is returning nullptr. I must have to inform MRI of the new reg BEFORE adding it as an operand. I'll add an assert for that.
aha! It's that a tied operands are generally a def (output) followed by a use (input); if the input/use is added without a corresponding def, MRI has conniptions.
https://github.com/llvm/llvm-project/pull/67699
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