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* [Bug tree-optimization/102696] New: ICE in vect_build_slp_tree, at tree-vect-slp.c:1551 for skylake-avx512 and icelake-server
@ 2021-10-12  1:45 vsevolod.livinskij at frtk dot ru
  2021-10-12  4:55 ` [Bug tree-optimization/102696] [12 Regression] " pinskia at gcc dot gnu.org
                   ` (4 more replies)
  0 siblings, 5 replies; 6+ messages in thread
From: vsevolod.livinskij at frtk dot ru @ 2021-10-12  1:45 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102696

            Bug ID: 102696
           Summary: ICE in vect_build_slp_tree, at tree-vect-slp.c:1551
                    for skylake-avx512 and icelake-server
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vsevolod.livinskij at frtk dot ru
  Target Milestone: ---

Link to the Compiler Explorer:
https://godbolt.org/z/WhYP35KKT

Reproducer:

int a;
extern bool b[][14];
char h;
void f(short g[][14]) {
    for (short d = h; d < 21; d += 1)
      for (unsigned char e = 0; e < 14; e += 1) {
        a = 0;
        b[d][e] = g[d][e];
      }
}

Error:
>$ g++ -c -O3 -march=skylake-avx512 func.cpp
during GIMPLE pass: slp
func.cpp: In function 'void f(short int (*)[14])':
func.cpp:4:6: internal compiler error: in vect_build_slp_tree, at
tree-vect-slp.c:1551
    4 | void f(short g[][14]) {
      |      ^
0x153e92a vect_build_slp_tree
        /testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:1551
0x153ee59 vect_build_slp_tree_2
        /testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:2199
0x153e41c vect_build_slp_tree
        /testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:1532
0x153ee59 vect_build_slp_tree_2
        /testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:2199
0x153e41c vect_build_slp_tree
        /testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:1532
0x153ee59 vect_build_slp_tree_2
        /testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:2199
0x153e41c vect_build_slp_tree
        /testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:1532
0x153ee59 vect_build_slp_tree_2
        /testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:2199
0x153e41c vect_build_slp_tree
        /testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:1532
0x1543ac2 vect_build_slp_instance
        /testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:3012
0x1544d35 vect_analyze_slp_instance
        /testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:3332
0x1543d96 vect_build_slp_instance
        /testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:3230
0x1544d35 vect_analyze_slp_instance
        /testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:3332
0x1543d96 vect_build_slp_instance
        /testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:3230
0x1544d35 vect_analyze_slp_instance
        /testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:3332
0x154979a vect_analyze_slp(vec_info*, unsigned int)
        /testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:3365
0x154d316 vect_slp_analyze_bb_1
        /testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:5746
0x154d316 vect_slp_region
        /testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:5848
0x154f495 vect_slp_bbs
        /testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:6040
0x154f799 vect_slp_function(function*)
        /testing/gcc/gcc_src_master/gcc/tree-vect-slp.c:6128
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.
root@86380205c3f4:/testing/result/S_3142105512/reduce# g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/testing/gcc/bin_master/libexec/gcc/x86_64-pc-linux-gnu/12.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /testing/gcc/gcc_src_master/configure --enable-multilib
--prefix=/testing/gcc/bin_master --disable-bootstrap
Thread model: posix
Supported LTO compression algorithms: zlib

gcc version 12.0.0 20211011 (30cce6f65a77b8eaa22f3efff7f1ba54858106f9) (GCC)

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2021-10-12  1:45 [Bug tree-optimization/102696] New: ICE in vect_build_slp_tree, at tree-vect-slp.c:1551 for skylake-avx512 and icelake-server vsevolod.livinskij at frtk dot ru
2021-10-12  4:55 ` [Bug tree-optimization/102696] [12 Regression] " pinskia at gcc dot gnu.org
2021-10-12  4:58 ` pinskia at gcc dot gnu.org
2021-10-12  6:25 ` rguenth at gcc dot gnu.org
2021-10-12 12:50 ` cvs-commit at gcc dot gnu.org
2021-10-12 12:51 ` rguenth at gcc dot gnu.org

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