[Bug bootstrap/18972] Regression: bootstrap failure of gcc-4.0-20041212 on OpenDarwin 7.2.1/x86 (i686-apple-darwin7.2.1): Bootstrap comparison failure

["lars dot sonchocky-helldorf at hamburg dot de" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From lars dot sonchocky-helldorf at hamburg dot de  2004-12-18 05:18 -------
(In reply to comment #6)
> (In reply to comment #5)
> > Indeed a Heisenbug:
> > 
> > Does anyone know how I could disassemble those .o files to get something more
> > human readable?
> 
> Use otool.

Did so.

I copied the reload.o files that were created by:

make restage2 BOOT_CFLAGS="-O2 -g -fomit-frame-pointer"

and:

make restage3 BOOT_CFLAGS="-O2 -g -fomit-frame-pointer"

into:

GCC/FSF/bootstrap-failure_gcc-4.0-20041212/stage2

and:

GCC/FSF/bootstrap-failure_gcc-4.0-20041212/stage3 

and then did the following with them:

otool -tV GCC/FSF/bootstrap-failure_gcc-4.0-20041212/stage3/reload.o &> stage3.reload.o.otool.s
otool -tV GCC/FSF/bootstrap-failure_gcc-4.0-20041212/stage2/reload.o &> stage2.reload.o.otool.s

which yielded two nice assembler files that I'll attach here (plus a diff for quick overview)

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18972