https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116626
Bug ID: 116626
Summary: ICE while VLA vectorisation
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: kugan at gcc dot gnu.org
Target Milestone: ---
Created attachment 59057
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=59057&action=edit
testcase
For a partally reduced code, I am seeing:
t.cpp:350:12: internal compiler error: in to_constant, at poly-int.h:592
350 | void _M_run() { _M_func(); }
| ^~~~~~
0x38da7fb internal_error(char const*, ...)
../../gcc/gcc/diagnostic-global-context.cc:492
0x38b1e5f fancy_abort(char const*, int, char const*)
../../gcc/gcc/diagnostic.cc:1658
0xf747cb poly_int<2u, unsigned long>::to_constant() const
../../gcc/gcc/poly-int.h:592
0x20bc547 nunits_for_known_piecewise_op
../../gcc/gcc/tree-vect-generic.cc:96
0x20bcff3 expand_vector_piecewise
../../gcc/gcc/tree-vect-generic.cc:290
0x20c1cc7 expand_vector_operation
../../gcc/gcc/tree-vect-generic.cc:1257
0x20c7f37 expand_vector_operations_1
../../gcc/gcc/tree-vect-generic.cc:2366
0x20c8117 expand_vector_operations
../../gcc/gcc/tree-vect-generic.cc:2400
0x20c8417 execute
../../gcc/gcc/tree-vect-generic.cc:2497
compile command: -O3 -mcpu=neoverse-v2 t.cpp -std=gnu++20
g++ -v
Using built-in specs.
COLLECT_GCC=/proj/grco/gcc/Linux_aarch64/upstream-main/latest/bin/g++
COLLECT_LTO_WRAPPER=/proj/grco/gcc/Linux_aarch64/upstream-main/20240905192606-a2e28b10/bin/../libexec/gcc/aarch64-unknown-linux-gnu/15.0.0/lto-wrapper
Target: aarch64-unknown-linux-gnu
Configured with: /var/jenkins/workspace/GCC_oss-main/configure
--enable-multiarch=yes --enable-languages=c,c++,fortran,lto
--prefix=/proj/grco/gcc/Linux_aarch64/oss-main/20240905192606-a2e28b10
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 15.0.0 20240906 (experimental) (GCC)
