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* [Bug target/54619] New: GCC aborts during compilation with '-O2 -mips16' @ 2012-09-18 17:08 sje at gcc dot gnu.org 2012-09-18 18:34 ` [Bug target/54619] " sje at gcc dot gnu.org ` (3 more replies) 0 siblings, 4 replies; 5+ messages in thread From: sje at gcc dot gnu.org @ 2012-09-18 17:08 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54619 Bug #: 54619 Summary: GCC aborts during compilation with '-O2 -mips16' Classification: Unclassified Product: gcc Version: 4.8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target AssignedTo: unassigned@gcc.gnu.org ReportedBy: sje@gcc.gnu.org Target: mips*-*-* I am getting a Floating point exception from the compiler while compiling the following small test program with -O2 -mips16. I can reproduce it while using a native or cross compiler targeting mips and while generating code for big or little endian. I could also reproduce it on targets for linux and for elf. % cat q.c swapfunc(char *a , char *b , int n , int swaptype) { long i = (n) / sizeof (char); char *pi = (char *) (a); char *pj = (char *) (b); do { *pi++ = *pj; } while (--i > 0); } qsort(void *a) { char *pb; int r; int swaptype; swapfunc(a, pb - r, r, swaptype); } % obj*/gcc/initial/gcc/cc1 -quiet -mel -O2 -mips16 q.c q.c: In function ‘qsort’: q.c:10:1: internal compiler error: Floating point exception qsort(void *a) ^ Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. % obj*/gcc/gcc/cc1 -version GNU C (GCC) version 4.8.0 20120913 (experimental) (mipsel-unknown-linux-gnu) compiled by GNU C version 4.8.0 20120913 (experimental), GMP version 4.3.2, MPFR version 3.0.0-p3, MPC version 0.8.2 GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug target/54619] GCC aborts during compilation with '-O2 -mips16' 2012-09-18 17:08 [Bug target/54619] New: GCC aborts during compilation with '-O2 -mips16' sje at gcc dot gnu.org @ 2012-09-18 18:34 ` sje at gcc dot gnu.org 2012-11-14 11:20 ` [Bug tree-optimization/54619] " vries at gcc dot gnu.org ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: sje at gcc dot gnu.org @ 2012-09-18 18:34 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54619 --- Comment #1 from Steve Ellcey <sje at gcc dot gnu.org> 2012-09-18 18:34:21 UTC --- It looks like this is coming from mips16_unextended_reference_p, if mode is VOIDmode then GET_MODE_SIZE (mode) is zero and we wind up doing 'offset % 0'. I think we should be checking for 'GET_MODE_SIZE == 0' instead of mode != 'BLKmode'. before doing the modulo instruction. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/54619] GCC aborts during compilation with '-O2 -mips16' 2012-09-18 17:08 [Bug target/54619] New: GCC aborts during compilation with '-O2 -mips16' sje at gcc dot gnu.org 2012-09-18 18:34 ` [Bug target/54619] " sje at gcc dot gnu.org @ 2012-11-14 11:20 ` vries at gcc dot gnu.org 2012-11-15 16:50 ` vries at gcc dot gnu.org 2012-11-15 16:55 ` vries at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: vries at gcc dot gnu.org @ 2012-11-14 11:20 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54619 vries at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2012-11-14 CC| |vries at gcc dot gnu.org Component|target |tree-optimization Ever Confirmed|0 |1 --- Comment #2 from vries at gcc dot gnu.org 2012-11-14 11:20:31 UTC --- Confirmed. Discussed here: http://gcc.gnu.org/ml/gcc-patches/2012-09/msg01378.html. Changing component to tree-optimization since problem is in ivopts passing VOIDmode to TARGET_ADDRESS_COST. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/54619] GCC aborts during compilation with '-O2 -mips16' 2012-09-18 17:08 [Bug target/54619] New: GCC aborts during compilation with '-O2 -mips16' sje at gcc dot gnu.org 2012-09-18 18:34 ` [Bug target/54619] " sje at gcc dot gnu.org 2012-11-14 11:20 ` [Bug tree-optimization/54619] " vries at gcc dot gnu.org @ 2012-11-15 16:50 ` vries at gcc dot gnu.org 2012-11-15 16:55 ` vries at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: vries at gcc dot gnu.org @ 2012-11-15 16:50 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54619 --- Comment #3 from vries at gcc dot gnu.org 2012-11-15 16:50:04 UTC --- Author: vries Date: Thu Nov 15 16:49:45 2012 New Revision: 193537 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=193537 Log: 2012-11-15 Tom de Vries <tom@codesourcery.com> PR tree-optimization/54619 * tree-ssa-loop-ivopts.c (get_use_type): New function. (get_computation_at): Use get_use_type. (get_computation_cost_at): Declare and set mem_mode. Use mem_mode. Modified: trunk/gcc/ChangeLog trunk/gcc/tree-ssa-loop-ivopts.c ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/54619] GCC aborts during compilation with '-O2 -mips16' 2012-09-18 17:08 [Bug target/54619] New: GCC aborts during compilation with '-O2 -mips16' sje at gcc dot gnu.org ` (2 preceding siblings ...) 2012-11-15 16:50 ` vries at gcc dot gnu.org @ 2012-11-15 16:55 ` vries at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: vries at gcc dot gnu.org @ 2012-11-15 16:55 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54619 vries at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED AssignedTo|unassigned at gcc dot |vries at gcc dot gnu.org |gnu.org | --- Comment #4 from vries at gcc dot gnu.org 2012-11-15 16:55:13 UTC --- Patch checked in, resolving as fixed. ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2012-11-15 16:55 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-09-18 17:08 [Bug target/54619] New: GCC aborts during compilation with '-O2 -mips16' sje at gcc dot gnu.org 2012-09-18 18:34 ` [Bug target/54619] " sje at gcc dot gnu.org 2012-11-14 11:20 ` [Bug tree-optimization/54619] " vries at gcc dot gnu.org 2012-11-15 16:50 ` vries at gcc dot gnu.org 2012-11-15 16:55 ` vries at gcc dot gnu.org
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