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[Bug rtl-optimization/53908] [4.7 Regression] csa removes needed memory load
- From: "hp at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 10 Jul 2012 17:03:14 +0000
- Subject: [Bug rtl-optimization/53908] [4.7 Regression] csa removes needed memory load
- Auto-submitted: auto-generated
- References: <bug-53908-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53908
--- Comment #3 from Hans-Peter Nilsson <hp at gcc dot gnu.org> 2012-07-10 17:03:14 UTC ---
(In reply to comment #2)
> I can't reproduce on x86_64-linux,
Odd. What does valgrind say / did you check the generated code?
> HP: are you sure it fails on x86_64?
Yes, as written. N.B.: I used --disable-bootstrap, but that shouldn't have any
significance modulo bugs. Host (native) compiler was the mentioned "Debian
4.4.5-8" x86_64 gcc, but not for all targets and only for pristine FSF code
checks. Are you sure you used the gcc 4.7 branch for x86_64? ;)
It can't be ruled out of course that there's some address hash thing clouding
the issue, but the reproducibility seems stable (same gcc binary on different
targets; different host gcc).