https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78120
James Greenhalgh <jgreenhalgh at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |ktkachov at gcc dot gnu.org --- Comment #5 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> --- If this is a 6 regression it may be more likely related to Kyrill's work on if-converting arithmetic instructions ( r227368 and follow-ups) than my cost work (which only landed for GCC 7) - though I'm sure my cost work won't have helped as the impact of my changes would likely cause less if-conversion for x86, which reports branches as cheap and conditional moves as expensive. My ifcvt work for GCC 6 was more related to multiple sets in a basic block, which I don't think this testcase requires.