https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109825
Bug ID: 109825
Summary: [14 Regression] ICE in ix86_widen_mult_cost, at
config/i386/i386.cc:20442 since
r14-666-g608e7f3ab47fe7
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: jamborm at gcc dot gnu.org
CC: uros at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-linux
Target: x86_64-linux
Compiling our gcc/testsuite/gcc.dg/vect/slp-widen-mult-u8.c with -Os
-ftree-slp-vectorize -mavx512vl (or -Oz, for that matter) leads to an
ICE:
/tmp$ ~/gcc/small/inst/bin/gcc -Os -ftree-slp-vectorize -mavx512vl
~/gcc/small/src/gcc/testsuite/gcc.dg/vect/slp-widen-mult-u8.c -S
during GIMPLE pass: slp
/home/mjambor/gcc/small/src/gcc/testsuite/gcc.dg/vect/slp-widen-mult-u8.c: In
function ‘foo1’:
/home/mjambor/gcc/small/src/gcc/testsuite/gcc.dg/vect/slp-widen-mult-u8.c:15:1:
internal compiler error: in ix86_widen_mult_cost, at config/i386/i386.cc:20442
15 | foo1(int len) {
| ^~~~
0x82f95a ix86_widen_mult_cost
/home/mjambor/gcc/small/src/gcc/config/i386/i386.cc:20442
0x82f95a ix86_vector_costs::add_stmt_cost(int, vect_cost_for_stmt,
_stmt_vec_info*, _slp_tree*, tree_node*, int, vect_cost_model_location)
/home/mjambor/gcc/small/src/gcc/config/i386/i386.cc:23479
0x11fe9b2 add_stmt_cost(vector_costs*, int, vect_cost_for_stmt,
_stmt_vec_info*, _slp_tree*, tree_node*, int, vect_cost_model_location)
/home/mjambor/gcc/small/src/gcc/tree-vectorizer.h:1779
0x11fe9b2 add_stmt_cost(vector_costs*, stmt_info_for_cost*)
/home/mjambor/gcc/small/src/gcc/tree-vectorizer.h:1801
0x11fe9b2 vect_bb_vectorization_profitable_p
/home/mjambor/gcc/small/src/gcc/tree-vect-slp.cc:6928
0x1202f3e vect_slp_region
/home/mjambor/gcc/small/src/gcc/tree-vect-slp.cc:7441
0x1203eec vect_slp_bbs
/home/mjambor/gcc/small/src/gcc/tree-vect-slp.cc:7611
0x12041cc vect_slp_function(function*)
/home/mjambor/gcc/small/src/gcc/tree-vect-slp.cc:7712
0x120e3d1 execute
/home/mjambor/gcc/small/src/gcc/tree-vectorizer.cc:1529
I have bisected this to r14-666-g608e7f3ab47fe7:
commit 608e7f3ab47fe746279c552c3574147aa3d8ee76 (HEAD)
Author: Uros Bizjak <ubiz...@gmail.com>
Date: Wed May 10 22:40:53 2023 +0200
i386: Add missing vector extend patterns [PR92658]
Add missing insn pattern for v2qi -> v2si vector extend and named
expanders to activate generation of vector extends to 8-byte and 4-byte
vectors.
gcc/ChangeLog:
PR target/92658
* config/i386/mmx.md (sse4_1_<code>v2qiv2si2): New insn pattern.
(<insn>v4qiv4hi2): New expander.
(<insn>v2hiv2si2): Ditto.
(<insn>v2qiv2si2): Ditto.
(<insn>v2qiv2hi2): Ditto.
gcc/testsuite/ChangeLog:
PR target/92658
* gcc.target/i386/pr92658-sse4-4b.c: New test.
* gcc.target/i386/pr92658-sse4-8b.c: New test.
