Sanjay Patel ceb595b04e [InstCombine] don't negate constant expression with fsub (PR37605) ...

X + (-C) would be transformed back into X - C, so infinite loop:
https://bugs.llvm.org/show_bug.cgi?id=37605

llvm-svn: 333610

2018-05-30 23:55:12 +00:00

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