[PATCH] D128599: [RISCV] Teach RISCVMergeBaseOffset to handle read-modify-write of a global.

[Alex Bradbury via Phabricator via llvm-commits]

asb added a comment.

I've not had a chance to delve in any further, but I'm getting a compilation failure with builtin-prefetch-2.c from the GCC torture suite when applying this patch:

  clang-15: /home/asb/llvm-project/llvm/lib/CodeGen/LiveVariables.cpp:129: void llvm::LiveVariables::HandleVirtRegUse(llvm::Register, llvm::MachineBasicBlock *, llvm::MachineInstr &): Assertion `MRI->getVRegDef(Reg) && "Register use before def!"' failed.


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