https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103208
Bug ID: 103208
Summary: ICE: SSA corruption (Existing SSA name for symbol
marked for renaming),or ICE in make_decl_rtl, at
varasm.c:1446
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: openmp
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
1. gcc-12.0.0-alpha20211107 snapshot
(g:962ff7d2849e1fa6a1fe0535aa2dec5c2b9a32a6) ICEs when compiling
gcc/testsuite/c-c++-common/gomp/loop-8.c w/ -O1 -fopenmp -fwrapv:
% gcc-12.0.0 -O1 -fopenmp -fwrapv -c gcc/testsuite/c-c++-common/gomp/loop-8.c
Existing SSA name for symbol marked for renaming: .omp_data_i_14(D)
during GIMPLE pass: sccp
gcc/testsuite/c-c++-common/gomp/loop-8.c: In function 'foo._omp_fn.0':
gcc/testsuite/c-c++-common/gomp/loop-8.c:6:11: internal compiler error: SSA
corruption
6 | #pragma omp parallel for collapse(2)
| ^~~
0xf3e860 update_ssa(unsigned int)
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/gcc/tree-into-ssa.c:3441
0xef4e38 cleanup_tree_cfg_noloop
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/gcc/tree-cfgcleanup.c:1078
0xef4e38 cleanup_tree_cfg(unsigned int)
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/gcc/tree-cfgcleanup.c:1183
0xdaf3dc execute_function_todo
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/gcc/passes.c:2008
0xdafd1c execute_todo
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/gcc/passes.c:2096
2. Omitting -O1 from the command line yields the following instead, which may
be a separate issue:
% gcc-12.0.0 -fopenmp -fwrapv -c gcc/testsuite/c-c++-common/gomp/loop-8.c
during RTL pass: expand
gcc/testsuite/c-c++-common/gomp/loop-8.c: In function 'foo._omp_fn.0':
gcc/testsuite/c-c++-common/gomp/loop-8.c:6:11: internal compiler error: in
make_decl_rtl, at varasm.c:1446
6 | #pragma omp parallel for collapse(2)
| ^~~
0x79274e make_decl_rtl(tree_node*)
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/gcc/varasm.c:1446
0xaed6f7 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/gcc/expr.c:10553
0xaf676f expand_expr
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/gcc/expr.h:301
0xaf676f expand_expr_addr_expr_1
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/gcc/expr.c:8430
0xaf65c4 expand_expr_addr_expr_1
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/gcc/expr.c:8476
0xaec095 expand_expr_addr_expr
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/gcc/expr.c:8551
0xaec095 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/gcc/expr.c:11767
0xa3a6e6 expand_normal
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/gcc/expr.h:307
0xa3a6e6 do_compare_and_jump
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/gcc/dojump.c:1257
0xa3bf47 do_jump_1
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/gcc/dojump.c:231
0x9bfba8 expand_gimple_cond
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/gcc/cfgexpand.c:2657
0x9c0b74 expand_gimple_basic_block
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/gcc/cfgexpand.c:5944
0x9c21fe execute
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/gcc/cfgexpand.c:6811
