https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84670
Bug ID: 84670
Summary: [8 Regression] ICE: in compute_antic_aux, at
tree-ssa-pre.c:2148 with -O2 -fno-tree-dominator-opts
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Created attachment 43545
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43545&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -O2 -fno-tree-dominator-opts testcase.c
during GIMPLE pass: pre
testcase.c: In function 'foo':
testcase.c:4:1: internal compiler error: in compute_antic_aux, at
tree-ssa-pre.c:2148
foo (void)
^~~
0xf6fd2e compute_antic_aux
/repo/gcc-trunk/gcc/tree-ssa-pre.c:2148
0xf6fd2e compute_antic
/repo/gcc-trunk/gcc/tree-ssa-pre.c:2364
0xf6fd2e execute
/repo/gcc-trunk/gcc/tree-ssa-pre.c:4131
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.
$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-trunk-258129-checking-yes-rtl-df-extra-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-258129-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/8.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--with-cloog --with-ppl --with-isl --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu
--with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-258129-checking-yes-rtl-df-extra-amd64
Thread model: posix
gcc version 8.0.1 20180302 (experimental) (GCC)
This is a recent regression:
r258129 - FAIL
r258075 - OK
