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* [Bug c/105163] New: ICE: SSA corruption
@ 2022-04-05 16:16 gscfq@t-online.de
  2022-04-05 16:17 ` [Bug c/105163] " gscfq@t-online.de
                   ` (8 more replies)
  0 siblings, 9 replies; 10+ messages in thread
From: gscfq@t-online.de @ 2022-04-05 16:16 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105163

            Bug ID: 105163
           Summary: ICE: SSA corruption
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Affects versions down to at least r5, at -O1+ :
(follow-up of pr79411.c)


$ cat z1.c
typedef struct __jmp_buf_tag { char buf[1024]; } jmp_buf[1];
extern int setjmp (jmp_buf);
extern int bar (unsigned int *);
extern jmp_buf *baz (void);
struct C { int c1; };
void foo (struct C *x, int *z, int e)
{
  unsigned int d = 0;
  long f;
  setjmp (*baz());
  f = 1 + ~d;
  d = 8;
  if ((!0) && !e && bar(z)) *z = 1 + f;
}


$ gcc-12-20220403 -c z1.c -O2

Unable to coalesce ssa_names 5 and 17 which are marked as MUST COALESCE.
d_5(ab) and  d_17(ab)
during RTL pass: expand
z1.c: In function 'foo':
z1.c:6:6: internal compiler error: SSA corruption
    6 | void foo (struct C *x, int *z, int e)
      |      ^~~
0xd18bc8 fail_abnormal_edge_coalesce
        ../../gcc/tree-ssa-coalesce.cc:1003
0xd18bc8 coalesce_partitions
        ../../gcc/tree-ssa-coalesce.cc:1425
0xd18bc8 coalesce_ssa_name(_var_map*)
        ../../gcc/tree-ssa-coalesce.cc:1755
0xcc26a0 remove_ssa_form
        ../../gcc/tree-outof-ssa.cc:1065
0xcc26a0 rewrite_out_of_ssa(ssaexpand*)
        ../../gcc/tree-outof-ssa.cc:1323
0x7cfa73 execute
        ../../gcc/cfgexpand.cc:6585

^ permalink raw reply	[flat|nested] 10+ messages in thread
end of thread, other threads:[~2022-05-27 13:18 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-04-05 16:16 [Bug c/105163] New: ICE: SSA corruption gscfq@t-online.de
2022-04-05 16:17 ` [Bug c/105163] " gscfq@t-online.de
2022-04-05 16:59 ` [Bug tree-optimization/105163] " jakub at gcc dot gnu.org
2022-04-05 17:00 ` [Bug tree-optimization/105163] [9/10/11/12 Regression] ICE: SSA corruption since r0-122928 jakub at gcc dot gnu.org
2022-04-06  7:15 ` rguenth at gcc dot gnu.org
2022-04-06  8:33 ` cvs-commit at gcc dot gnu.org
2022-05-19 14:03 ` [Bug tree-optimization/105163] [9/10/11 " cvs-commit at gcc dot gnu.org
2022-05-27  9:47 ` [Bug tree-optimization/105163] [10 " rguenth at gcc dot gnu.org
2022-05-27 13:15 ` cvs-commit at gcc dot gnu.org
2022-05-27 13:18 ` rguenth at gcc dot gnu.org

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