Sergei Organov wrote: > Andrew Haley <[EMAIL PROTECTED]> writes: > > >>Sergei Organov writes: >> > Hi, >> > >> > Using gcc compiled from gcc-4_0-branch, in an attempt to see which >> > particular optimization option makes my test case to be mis-optimized, I >> > try to replace -O1 (which toggles on the problem) with corresponding set >> > of -fxxx optimization options. >> >>In general you can't do this. You can turn some optimization passes >>off, though. > > > Sigh :(
To be clear - there are a number of optimizations which have no corresponding -f switch, being enabled or disabled solely by "if (optimize)" constructs; the global 'optimize' flag is set by -On (n>0). Similarly, there are places where "if (optimize >= 2)" is the sole trigger. This could be construed a bug, and I do not think there would be objection to patches that add -f options for every such optimization. zw
