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* [Bug middle-end/55921] New: Crash in verify_ssa for asm to side-steps complex pessimization
@ 2013-01-09 17:09 amylaar at gcc dot gnu.org
  2013-01-09 17:10 ` [Bug middle-end/55921] " amylaar at gcc dot gnu.org
                   ` (11 more replies)
  0 siblings, 12 replies; 13+ messages in thread
From: amylaar at gcc dot gnu.org @ 2013-01-09 17:09 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55921

             Bug #: 55921
           Summary: Crash in verify_ssa for asm to side-steps complex
                    pessimization
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: amylaar@gcc.gnu.org


Created attachment 29126
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29126
testcase

verify_ssa crashes during expand for a simple testcase that uses a pair of
asms to avoid the tree pass pessimization of complex type data moves.

Observed with GCC 4.7.0 i686-pc-linux-gnu X epiphany-elf,
i686-pc-linux-gnu native Red Hat 4.7.2-2, and
i686-pc-linux-gnu native 4.8.0 20130109 (experimental) (revision 195054)

(gdb) run
Starting program: /ssd/fsf/inst/libexec/gcc/i686-pc-linux-gnu/4.8.0/cc1
-fpreprocessed tc3.i -quiet -dumpbase tc3.c -mtune=generic -march=pentiumpro
-auxbase tc3 -version -o tc3.s
GNU C (GCC) version 4.8.0 20130109 (experimental) (i686-pc-linux-gnu)
        compiled by GNU C version 4.8.0 20130109 (experimental), GMP version
5.0.2, MPFR version 3.1.0, MPC version 0.9
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU C (GCC) version 4.8.0 20130109 (experimental) (i686-pc-linux-gnu)
        compiled by GNU C version 4.8.0 20130109 (experimental), GMP version
5.0.2, MPFR version 3.1.0, MPC version 0.9
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 7fd55bd33553a03a09fb094c59fe563c

Program received signal SIGSEGV, Segmentation fault.
verify_ssa (check_modified_stmt=true) at ../../gcc/gcc/tree-ssa.c:942
942               if (!gimple_nop_p (stmt))
(gdb) bt
#0  verify_ssa (check_modified_stmt=true) at ../../gcc/gcc/tree-ssa.c:942
#1  0x084c6fbe in execute_function_todo (data=data@entry=0x8001c)
    at ../../gcc/gcc/passes.c:1969
#2  0x084c7788 in do_per_function (
    callback=0x84c6f20 <execute_function_todo(void*)>, data=0x8001c)
    at ../../gcc/gcc/passes.c:1703
#3  0x084c78ba in execute_todo (flags=524316) at ../../gcc/gcc/passes.c:2001
#4  0x084cabff in execute_one_pass (pass=pass@entry=0x8dced80)
    at ../../gcc/gcc/passes.c:2321
#5  0x084cb035 in execute_pass_list (pass=0x8dced80)
    at ../../gcc/gcc/passes.c:2383
#6  0x0826186e in expand_function (node=0xb7be93f0)
    at ../../gcc/gcc/cgraphunit.c:1641
#7  0x08263bb4 in output_in_order () at ../../gcc/gcc/cgraphunit.c:1834
#8  compile () at ../../gcc/gcc/cgraphunit.c:2038
#9  0x08263f2a in finalize_compilation_unit ()
    at ../../gcc/gcc/cgraphunit.c:2120
#10 0x08137e45 in c_write_global_declarations ()
    at ../../gcc/gcc/c/c-decl.c:10120
#11 0x0856d85d in compile_file () at ../../gcc/gcc/toplev.c:559
#12 0x0856f82c in do_compile () at ../../gcc/gcc/toplev.c:1878
#13 toplev_main (argc=13, argv=0xbfffeda4) at ../../gcc/gcc/toplev.c:1954
#14 0x0811a2cb in main (argc=13, argv=0xbfffeda4) at ../../gcc/gcc/main.c:36
(gdb) frame 0
#0  verify_ssa (check_modified_stmt=true) at ../../gcc/gcc/tree-ssa.c:942
942               if (!gimple_nop_p (stmt))
(gdb) p stmt
$1 = (gimple_statement_d *) 0x0


^ permalink raw reply	[flat|nested] 13+ messages in thread
end of thread, other threads:[~2013-04-03 18:20 UTC | newest]

Thread overview: 13+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2013-01-09 17:09 [Bug middle-end/55921] New: Crash in verify_ssa for asm to side-steps complex pessimization amylaar at gcc dot gnu.org
2013-01-09 17:10 ` [Bug middle-end/55921] " amylaar at gcc dot gnu.org
2013-01-09 17:20 ` pinskia at gcc dot gnu.org
2013-01-09 18:39 ` jakub at gcc dot gnu.org
2013-01-09 20:29 ` [Bug middle-end/55921] [4.6/4.7/4.8 Regression] " jakub at gcc dot gnu.org
2013-01-09 20:32 ` jakub at gcc dot gnu.org
2013-01-10  9:26 ` jakub at gcc dot gnu.org
2013-01-10  9:32 ` [Bug middle-end/55921] [4.6/4.7 " jakub at gcc dot gnu.org
2013-01-12  2:03 ` danglin at gcc dot gnu.org
2013-01-30  2:57 ` danglin at gcc dot gnu.org
2013-02-01 14:09 ` jakub at gcc dot gnu.org
2013-02-01 14:30 ` [Bug middle-end/55921] [4.6 " jakub at gcc dot gnu.org
2013-04-03 18:20 ` jakub at gcc dot gnu.org

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