[LLVMdev] Optimization of sqrt() with invalid argument

[Sanjay Patel]

Bill raised another question in the bug report that I'm curious about too:
Is anyone or any bot running/posting SPEC CPU results for clang?

I know it's part of test-suite/external, but this constant fold code has
been around 5+ years. Was the bug lying dormant all this time, only visible
on PPC, or something else?
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