https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100398
Bug ID: 100398
Summary: [12 Regression] ICE in
gimple_redirect_edge_and_branch, at tree-cfg.c:6082
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: x86_64-unknown-linux-gnu
gcc-12.0.0-alpha20210502 snapshot (g:92f59e47f5a468b96b12b15233a6729904b1a1ee)
ICEs when compiling the following testcase, reduced from
test/CodeGen/asm-goto.c from the clang 11.1.0 test suite, w/ -O1:
int
test5_limit (void)
{
int addr;
asm goto ("" : "+r" (addr) : : : t_err);
return 0;
t_err:
return 1;
}
% x86_64-unknown-linux-gnu-gcc-12.0.0 -O1 -c xttz2qcb.c
during GIMPLE pass: veclower2
xttz2qcb.c: In function 'test5_limit':
xttz2qcb.c:2:1: internal compiler error: in gimple_redirect_edge_and_branch, at
tree-cfg.c:6082
2 | test5_limit (void)
| ^~~~~~~~~~~
0x6cfa49 gimple_redirect_edge_and_branch
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210502/work/gcc-12-20210502/gcc/tree-cfg.c:6082
0x9701e9 redirect_edge_and_branch(edge_def*, basic_block_def*)
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210502/work/gcc-12-20210502/gcc/cfghooks.c:373
0xe610a6 remove_forwarder_block
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210502/work/gcc-12-20210502/gcc/tree-cfgcleanup.c:585
0xe610a6 cleanup_tree_cfg_bb
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210502/work/gcc-12-20210502/gcc/tree-cfgcleanup.c:754
0xe61808 cleanup_tree_cfg_noloop
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210502/work/gcc-12-20210502/gcc/tree-cfgcleanup.c:1103
0xe61808 cleanup_tree_cfg(unsigned int)
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210502/work/gcc-12-20210502/gcc/tree-cfgcleanup.c:1187
0xd2bf64 execute_function_todo
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210502/work/gcc-12-20210502/gcc/passes.c:2008
0xd2c89b execute_todo
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210502/work/gcc-12-20210502/gcc/passes.c:2096
