[PATCH] D106754: [RISCV] Restrict performANY_EXTENDCombine to prevent an infinite loop.

[Fraser Cormack via Phabricator via llvm-commits]

frasercrmck added inline comments.


================
Comment at: llvm/lib/Target/RISCV/RISCVISelLowering.cpp:5802
+  // infinite combine loops like PR51206.
+  bool HasCopyToRegUser = false;
+  for (SDNode::use_iterator UI = N->use_begin(), UE = N->use_end(); UI != UE;
----------------
I'd probably suggest
```
  if (!any_of(N->uses(),
              [](SDNode *User) { return User->getOpcode() == ISD::CopyToReg; }))
    return SDValue();
```

which I believe is equivalent.


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https://reviews.llvm.org/D106754