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Subject: [Bug middle-end/103262] New: [12 Regression] Random FAIL:
 gcc.c-torture/execute/20061220-1.c after r12-5242
Date: Mon, 15 Nov 2021 18:28:24 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103262

            Bug ID: 103262
           Summary: [12 Regression] Random FAIL:
                    gcc.c-torture/execute/20061220-1.c after r12-5242
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
  Target Milestone: ---

On Linux/x86-64, I got random

spawn -ignore SIGHUP
/export/users/hjl/build/gnu/tools-build/gcc-32bit-gitlab/build-i686-linux/g=
cc/xgcc
-B/export/users/hjl/build/gnu/tools-build/gcc-32bit-gitlab/build-i686-linux=
/gcc/
/export/gnu/import/git/gitlab/x86-gcc/gcc/testsuite/gcc.c-torture/execute/2=
0061220-1.c
-fdiagnostics-plain-output -O1 -w -lm -o ./20061220-1.exe
during GIMPLE pass: modref
/export/gnu/import/git/gitlab/x86-gcc/gcc/testsuite/gcc.c-torture/execute/2=
0061220-1.c:
In function 'main':
/export/gnu/import/git/gitlab/x86-gcc/gcc/testsuite/gcc.c-torture/execute/2=
0061220-1.c:73:1:
internal compiler error: in operator[], at vec.h:889
0x8306118 vec<ipa_jump_func, va_gc, vl_embed>::operator[](unsigned int)
        /export/gnu/import/git/gitlab/x86-gcc/gcc/vec.h:889
0x8306dbe vec<modref_parm_map, va_heap, vl_embed>::operator[](unsigned int)
        /export/gnu/import/git/gitlab/x86-gcc/gcc/vec.h:1903
0x8306dbe vec<modref_parm_map, va_heap, vl_ptr>::operator[](unsigned int)
        /export/gnu/import/git/gitlab/x86-gcc/gcc/vec.h:1495
0x8306dbe merge_call_side_effects
        /export/gnu/import/git/gitlab/x86-gcc/gcc/ipa-modref.c:1034
0x8866a54 analyze_call
        /export/gnu/import/git/gitlab/x86-gcc/gcc/ipa-modref.c:1414
0x8866a54 analyze_stmt
        /export/gnu/import/git/gitlab/x86-gcc/gcc/ipa-modref.c:1585
0x8868eb1 analyze_function
        /export/gnu/import/git/gitlab/x86-gcc/gcc/ipa-modref.c:2935
0x886ac6d execute
        /export/gnu/import/git/gitlab/x86-gcc/gcc/ipa-modref.c:3965
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
compiler exited with status 1
FAIL: gcc.c-torture/execute/20061220-1.c   -O1  (internal compiler error)
FAIL: gcc.c-torture/execute/20061220-1.c   -O1  (test for excess errors)

r12-5242 is OK and r12-5244 is not.  But it may be latent since it fails
at random.=