llvm-project

c45aa5c7 - [InstCombine] Revert FSub optimization from #157757 (#158315)

[InstCombine] Revert FSub optimization from #157757 (#158315) Since FSub X, 0 gets canoncialised to FAdd X, -0 the said optimization didn't make much sense for FSub. Remove it from IC and the adjoined testcase.