https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87657
Bug ID: 87657
Summary: [9 Regression] SLP ICE in libgfortran
matmul_i2_vanilla
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: amonakov at gcc dot gnu.org
Target Milestone: ---
Target: i?86-*-*
Created attachment 44858
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44858&action=edit
unreduced testcase
32-bit x86 bootstrap fails at stage3 building libgfortran.
On the attached testcase the following command line fails:
gcc/cc1 -O2 -fcx-fortran-rules -ffunction-sections -fdata-sections -ffast-math
-ftree-vectorize -funroll-loops --param max-unroll-times=4
/home/am/gcc-sort/libgfortran/generated/matmul_i2.c: In function
‘matmul_i2_vanilla’:
/home/am/gcc-sort/libgfortran/generated/matmul_i2.c:1805:1: internal compiler
error: in ix86_builtin_vectorization_cost, at config/i386/i386.c:45176
1805 | matmul_i2_vanilla (gfc_array_i2 * const restrict retarray,
| ^~~~~~~~~~~~~~~~~
0x8ad647b ix86_builtin_vectorization_cost
/home/am/gcc-sort/gcc/config/i386/i386.c:45176
0x89b8d71 builtin_vectorization_cost
/home/am/gcc-sort/gcc/tree-vectorizer.h:1181
0x89b8d71 record_stmt_cost(vec<stmt_info_for_cost, va_heap, vl_ptr>*, int,
vect_cost_for_stmt, _stmt_vec_info*, int, vect_cost_model_location)
/home/am/gcc-sort/gcc/tree-vect-stmts.c:106
0x89bb126 vect_prologue_cost_for_slp_op
/home/am/gcc-sort/gcc/tree-vect-stmts.c:837
0x89cf3d8 vect_model_store_cost
/home/am/gcc-sort/gcc/tree-vect-stmts.c:974
0x89cf3d8 vectorizable_store
/home/am/gcc-sort/gcc/tree-vect-stmts.c:6380
0x89d9117 vect_analyze_stmt(_stmt_vec_info*, bool*, _slp_tree*, _slp_instance*,
vec<stmt_info_for_cost, va_heap, vl_ptr>*)
/home/am/gcc-sort/gcc/tree-vect-stmts.c:9566
0x8a07188 vect_slp_analyze_node_operations_1
/home/am/gcc-sort/gcc/tree-vect-slp.c:2422
0x8a07188 vect_slp_analyze_node_operations
/home/am/gcc-sort/gcc/tree-vect-slp.c:2469
0x8a0a397 vect_slp_analyze_operations(vec_info*)
/home/am/gcc-sort/gcc/tree-vect-slp.c:2501
0x8a0b429 vect_slp_analyze_bb_1
/home/am/gcc-sort/gcc/tree-vect-slp.c:2809
0x8a0b429 vect_slp_bb(basic_block_def*)
/home/am/gcc-sort/gcc/tree-vect-slp.c:2896
0x8a0bd86 execute
/home/am/gcc-sort/gcc/tree-vectorizer.c:1291
