[Bug bootstrap/45611] [4.6 regression] SIGBUS in generate_option_input_file on Solaris 2/SPARC
--- Comment #8 from rguenth at gcc dot gnu dot org 2010-09-13 09:35 --- I have a patch. -- rguenth at gcc dot gnu dot org changed: What|Removed |Added AssignedTo|unassigned at gcc dot gnu |rguenth at gcc dot gnu dot |dot org |org Status|WAITING |ASSIGNED Last reconfirmed|2010-09-09 12:43:28 |2010-09-13 09:35:04 date|| http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45611
[Bug bootstrap/45611] [4.6 regression] SIGBUS in generate_option_input_file on Solaris 2/SPARC
--- Comment #9 from rguenth at gcc dot gnu dot org 2010-09-13 10:47 --- Subject: Bug 45611 Author: rguenth Date: Mon Sep 13 10:47:28 2010 New Revision: 164244 URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=164244 Log: 2010-09-13 Richard Guenther rguent...@suse.de PR tree-optimization/45611 * tree-ssa-loop-ivopts.c (rewrite_use_nonlinear_expr): Fix typo. (copy_ref_info): Likewise. Modified: trunk/gcc/ChangeLog trunk/gcc/tree-ssa-loop-ivopts.c -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45611
[Bug bootstrap/45611] [4.6 regression] SIGBUS in generate_option_input_file on Solaris 2/SPARC
--- Comment #10 from rguenth at gcc dot gnu dot org 2010-09-13 10:48 --- Should be fixed now. -- rguenth at gcc dot gnu dot org changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution||FIXED http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45611
[Bug bootstrap/45611] [4.6 regression] SIGBUS in generate_option_input_file on Solaris 2/SPARC
--- Comment #11 from ebotcazou at gcc dot gnu dot org 2010-09-13 10:55 --- *** Bug 45421 has been marked as a duplicate of this bug. *** -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45611
[Bug bootstrap/45611] [4.6 regression] SIGBUS in generate_option_input_file on Solaris 2/SPARC
--- Comment #5 from ro at CeBiTec dot Uni-Bielefeld dot DE 2010-09-10 15:48 --- Subject: Re: [4.6 regression] SIGBUS in generate_option_input_file on Solaris 2/SPARC --- Comment #4 from rguenth at gcc dot gnu dot org 2010-09-09 13:27 --- I don't have access to sparc-sun-solaris2*, so I can't bootstrap it (but at most build a cross cc1). Not even sparc-linux? I very much doubt the bug is Solaris-specific. So please attach a testcase (easiest is probably in a non-bootstrapped tree run make check and pick a simple one that fails from the C testsuite). Ok, I'll try to find one. Is sparc-sun-solaris2* a STRICT_ALIGNMENT target? What's the clr instruction? Is it a store or a load? Yes, cf. sparc.h. clr and clrx store 0 (4 or 8 bytes) at the target address, requiring natural alignment (which fails with your patch for the clrx case). -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45611
[Bug bootstrap/45611] [4.6 regression] SIGBUS in generate_option_input_file on Solaris 2/SPARC
--- Comment #6 from rguenther at suse dot de 2010-09-10 15:51 --- Subject: Re: [4.6 regression] SIGBUS in generate_option_input_file on Solaris 2/SPARC On Fri, 10 Sep 2010, ro at CeBiTec dot Uni-Bielefeld dot DE wrote: --- Comment #5 from ro at CeBiTec dot Uni-Bielefeld dot DE 2010-09-10 15:48 --- Subject: Re: [4.6 regression] SIGBUS in generate_option_input_file on Solaris 2/SPARC --- Comment #4 from rguenth at gcc dot gnu dot org 2010-09-09 13:27 --- I don't have access to sparc-sun-solaris2*, so I can't bootstrap it (but at most build a cross cc1). Not even sparc-linux? I very much doubt the bug is Solaris-specific. No, not even sparc-linux. So please attach a testcase (easiest is probably in a non-bootstrapped tree run make check and pick a simple one that fails from the C testsuite). Ok, I'll try to find one. Is sparc-sun-solaris2* a STRICT_ALIGNMENT target? What's the clr instruction? Is it a store or a load? Yes, cf. sparc.h. clr and clrx store 0 (4 or 8 bytes) at the target address, requiring natural alignment (which fails with your patch for the clrx case). Thanks. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45611
[Bug bootstrap/45611] [4.6 regression] SIGBUS in generate_option_input_file on Solaris 2/SPARC
--- Comment #7 from ro at CeBiTec dot Uni-Bielefeld dot DE 2010-09-10 19:10 --- Subject: Re: [4.6 regression] SIGBUS in generate_option_input_file on Solaris 2/SPARC So please attach a testcase (easiest is probably in a non-bootstrapped tree run make check and pick a simple one that fails from the C testsuite). Ok, I'll try to find one. I've found one (in fact, it seems to be the only C one): +FAIL: gcc.c-torture/execute/20100708-1.c execution, -O2 +FAIL: gcc.c-torture/execute/20100708-1.c execution, -Os +FAIL: gcc.c-torture/execute/20100708-1.c execution, -O2 -flto +FAIL: gcc.c-torture/execute/20100708-1.c execution, -O2 -fwhopr Without and with your patch, it shows the following difference, just like the change that causes xgcc to get a SIGBUS: --- /homes/ro/20100708-1.s 2010-09-10 20:53:11.730613000 +0200 +++ 20100708-1.s2010-09-10 20:51:09.161003200 +0200 @@ -7,8 +7,7 @@ f: mov 16, %g1 .LL2: - st %g0, [%o0+8] - st %g0, [%o0+12] + stx %g0, [%o0+8] st %g0, [%o0+16] addcc %g1, -1, %g1 bne,pt %icc, .LL2 clr and clrx are just synthetic instructions, the real thing can be seen above: st resp. stx are stores of 4 resp. 8 bytes, and the %g0 register always reads as 0. %o0 isn't 8-byte aligned in this case, so the testcase dies with SIGBUS. Compile with $ cc1 20100708-1.c -mcpu=v9 -O2 to reproduce. Thanks. Rainer -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45611
[Bug bootstrap/45611] [4.6 regression] SIGBUS in generate_option_input_file on Solaris 2/SPARC
--- Comment #1 from ebotcazou at gcc dot gnu dot org 2010-09-09 10:38 --- Presumably 163997 then. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45611
[Bug bootstrap/45611] [4.6 regression] SIGBUS in generate_option_input_file on Solaris 2/SPARC
--- Comment #2 from ro at CeBiTec dot Uni-Bielefeld dot DE 2010-09-09 12:41 --- Subject: Re: [4.6 regression] SIGBUS in generate_option_input_file on Solaris 2/SPARC --- Comment #1 from ebotcazou at gcc dot gnu dot org 2010-09-09 10:38 --- Presumably 163997 then. Indeed: a C-only bootstrap on sparc-sun-solaris2.10 works as of rev 163996 and fails with 163997. Rainer -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45611
[Bug bootstrap/45611] [4.6 regression] SIGBUS in generate_option_input_file on Solaris 2/SPARC
--- Comment #3 from ro at gcc dot gnu dot org 2010-09-09 12:43 --- Richard, could you please have a look? -- ro at gcc dot gnu dot org changed: What|Removed |Added CC||rguenther at suse dot de Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 Last reconfirmed|-00-00 00:00:00 |2010-09-09 12:43:28 date|| http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45611
[Bug bootstrap/45611] [4.6 regression] SIGBUS in generate_option_input_file on Solaris 2/SPARC
--- Comment #4 from rguenth at gcc dot gnu dot org 2010-09-09 13:27 --- (In reply to comment #3) Richard, could you please have a look? I don't have access to sparc-sun-solaris2*, so I can't bootstrap it (but at most build a cross cc1). So please attach a testcase (easiest is probably in a non-bootstrapped tree run make check and pick a simple one that fails from the C testsuite). Is sparc-sun-solaris2* a STRICT_ALIGNMENT target? What's the clr instruction? Is it a store or a load? The revision in question is supposed to make alignment less strict and I can't see how this can break anything. -- rguenth at gcc dot gnu dot org changed: What|Removed |Added Status|NEW |WAITING Target Milestone|--- |4.6.0 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45611
