https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103262
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/gcc/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/20061220-1.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/20061220-1.c:
In function 'main':
/export/gnu/import/git/gitlab/x86-gcc/gcc/testsuite/gcc.c-torture/execute/20061220-1.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.
