[PATCH] D128437: [fastregalloc] Fix bug when there is no register class.

[Matt Arsenault via Phabricator via llvm-commits]

arsenm requested changes to this revision.
arsenm added inline comments.
This revision now requires changes to proceed.


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Comment at: llvm/lib/CodeGen/RegAllocFast.cpp:307-310
+  // Follow the default behaviour to return true if there is no
+  // register class for the register. This may happen in gloal ISel.
+  if (!RC)
+    return true;
----------------
This should not happen. This is a bug in x86 globalisel. Virtual registers without a class should not get past the selector. The verifier should catch this


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  https://reviews.llvm.org/D128437/new/

https://reviews.llvm.org/D128437