Another thing you might try: from the GCC manual, -O1 is equivalent
to :
-fdefer-pop
-fdelayed-branch
-fguess-branch-probability
-fcprop-registers
-floop-optimize
-fif-conversion
-fif-conversion2
-ftree-ccp
-ftree-dce
-ftree-dominator-opts
-ftree-dse
-ftree-ter
-ftree-lrs
-ftree-sra
-ftree-copyrename
-ftree-fre
-ftree-ch
-fmerge-constants
So it might be worth trying to find the minimal combination of these
flags which exhibit the problem.
J'
On Wed, Apr 04, 2007 at 12:11:04AM +0800, John McCabe-Dansted wrote:
I've mentioned previously many of the bugs in the Mingw port go away
if we compile with -O0.
Most of them come back if we compile with -O1. I understand that O1
code is meant to be reasonable to debug, so we may be able to diagnose
those problems by debugging code generated with "-O1 -g".
I intend to (as John D suggested offlist) also write a script to
change the compile options on each .o file and see which ones seem to
be causing the bugs.
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