------- Comment #1 from rguenth at gcc dot gnu dot org 2007-11-28 10:14 ------- Confirmed. The mentioned patch has been applied to the trunk already.
> The patch not only causes -g divergence, it also accidentally drops subblocks > that need to be kept around for the sake of generating debug information for > them. This is certainly bad and needs to be (is already) fixed. > http://gcc.gnu.org/ml/gcc-patches/2007-07/msg01745.html regresses the property > that code output with -g must be the same as that without -g. make > bootstrap-debug demonstrates that several files miscompare after this patch, > and don't if the patch is reversed. This causes memory-usage regressions for non-debug builds, for example for tramp3d-v4 at -O2 -Dleafify=flatten which (peak) memory-usage grows from 807MB to 1248MB. (Worse if you also add -fopenmp, less worse if you drop -Dleafify=flatten) The following two patches http://gcc.gnu.org/ml/gcc-patches/2007-11/msg00523.html http://gcc.gnu.org/ml/gcc-patches/2007-11/msg00524.html probably address the latter problem in a more efficient way. -- rguenth at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |rguenth at gcc dot gnu dot | |org Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 Last reconfirmed|0000-00-00 00:00:00 |2007-11-28 10:14:58 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34255
