[Bug tree-optimization/97603] Failure to optimize out compare into reuse of subtraction result
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97603 --- Comment #3 from Gabriel Ravier --- Well, I don't actually know enough to be able to determine which would be optimal. Transformation to the example from the third comment would be suboptimal on some targets (say, I don't think AVR would like this for 64-bit numbers), while doing this as an x86 specific transformation would be missing on an optimization opportunity on plenty of other targets.
[Bug tree-optimization/97603] Failure to optimize out compare into reuse of subtraction result
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97603 --- Comment #2 from Hongtao.liu --- (In reply to Hongtao.liu from comment #1) > Shouldn't it be marked as target issue for x86? Or you means that middle-end should transform code to int g(); int f(int a, int b) { int c = a - b; if (c) return c; return g(); }
[Bug tree-optimization/97603] Failure to optimize out compare into reuse of subtraction result
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97603 --- Comment #1 from Hongtao.liu --- Shouldn't it be marked as target issue for x86?