[llvm-commits] [PATCH] fix PR13577, an issue caused by r161687

[Michael Liao]

Hi

Sorry, PR13577 and recent failures of compiler-rt failures is introduced
by r161687. The root cause is that FCMOV (only used for 80-bit double)
only supports a subset of X86 conditions. The attached patch fixes that
by checking whether it's a CMOV on f80 and whether the condition is
valid. A minimal test case (copysign) for PR13577 is also added.

Please review the attached patch.

Yours
- Michael

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