[llvm] [InstCombine] Fold fcmp ogt (x - y), 0 into fcmp ogt x, y #85245 (PR #85506)

[Jay Foad via llvm-commits]

jayfoad wrote:

> @jayfoad, how can I check for denormals being flushed?

See earlier comments. @arsenm said:

> F.getDenormalType(fltSemantics) == DenormalMode::getIEEE() works, but is pretty ugly

https://github.com/llvm/llvm-project/pull/85506