On Tue, Apr 23, 2019 at 12:04:21PM -0700, Nathan Chancellor wrote:
Hi Greg and Sasha, Please apply this commit to 4.4 through 5.0 (patches are threaded in reply to this one), which will prevent Clang from emitting references to compiler runtime functions and doing some performance-killing optimization when using CONFIG_CC_OPTIMIZE_FOR_SIZE. Please let me know if I did something wrong or if there are any objections.
This looks like a fix for a performance regression, which don't usually end up in stable unless they are severe enough. This patch looks simple enough, and seeing peterz on it suggests to me that this was significant enough for someone to notice. Is this really the case, or is this just one of those %0.01 performance regression things? -- Thanks, Sasha
