https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118205
Bug ID: 118205
Summary: [15 Regression] ICE: in as_a, at is-a.h:255 with -O
-floop-parallelize-all -ftree-parallelize-loops=2
Product: gcc
Version: 15.0
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
Target: x86_64-pc-linux-gnu
Created attachment 59979
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=59979&action=edit
auto-reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -O -floop-parallelize-all -ftree-parallelize-loops=2
testcase.C
during GIMPLE pass: parloops
testcase.C: In member function 'int Gfx10Lib::HwlComputeMaxMetaBaseAlignments()
const':
testcase.C:6:5: internal compiler error: in as_a, at is-a.h:255
6 | int Gfx10Lib::HwlComputeMaxMetaBaseAlignments() const {
| ^~~~~~~~
0x3124421 internal_error(char const*, ...)
/repo/gcc-trunk/gcc/diagnostic-global-context.cc:517
0xfd8917 fancy_abort(char const*, int, char const*)
/repo/gcc-trunk/gcc/diagnostic.cc:1722
0x98d2e9 gimple_statement_with_memory_ops*
as_a<gimple_statement_with_memory_ops*, gimple>(gimple*)
/repo/gcc-trunk/gcc/is-a.h:255
0x98d6bb gphi const* as_a<gphi const*, gimple const>(gimple const*)
/repo/gcc-trunk/gcc/tree-parloops.cc:964
0x98d6bb gimple_phi_result(gimple const*)
/repo/gcc-trunk/gcc/gimple.h:4617
0x98d6bb reduction_phi
/repo/gcc-trunk/gcc/tree-parloops.cc:958
0x1a636d7 try_create_reduction_list
/repo/gcc-trunk/gcc/tree-parloops.cc:3553
0x1a636d7 parallelize_loops
/repo/gcc-trunk/gcc/tree-parloops.cc:4118
0x1a64df1 execute
/repo/gcc-trunk/gcc/tree-parloops.cc:4238
0x1a64df1 execute
/repo/gcc-trunk/gcc/tree-parloops.cc:4217
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
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-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-20241226001859-r15-6441-g45b017b467bb91-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/15.0.0/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
--disable-bootstrap --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 --enable-libsanitizer
--disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-20241226001859-r15-6441-g45b017b467bb91-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 15.0.0 20241226 (experimental) (GCC)
