https://gcc.gnu.org/g:65e72b95c63a5501cf1482f3814ae8c8e672bf06
commit r15-1375-g65e72b95c63a5501cf1482f3814ae8c8e672bf06 Author: Richard Biener <rguent...@suse.de> Date: Mon Jun 17 14:36:56 2024 +0200 tree-optimization/115508 - fix ICE with SLP scheduling and extern vector When there's a permute after an extern vector we can run into a case that didn't consider the scheduled node being a permute which lacks a representative. PR tree-optimization/115508 * tree-vect-slp.cc (vect_schedule_slp_node): Guard check on representative. * gcc.target/i386/pr115508.c: New testcase. Diff: --- gcc/testsuite/gcc.target/i386/pr115508.c | 15 +++++++++++++++ gcc/tree-vect-slp.cc | 1 + 2 files changed, 16 insertions(+) diff --git a/gcc/testsuite/gcc.target/i386/pr115508.c b/gcc/testsuite/gcc.target/i386/pr115508.c new file mode 100644 index 000000000000..a97b2007f7a9 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr115508.c @@ -0,0 +1,15 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -march=znver1" } */ + +typedef long long v4di __attribute__((vector_size(4 * sizeof (long long)))); + +v4di vec_var; +extern long long array1[]; +long long g(void) +{ + int total_error_4 = 0; + total_error_4 += array1 [0] + array1 [1] + array1 [2] + array1 [3]; + v4di t = vec_var; + long long iorvar = t [1] | t [0] | t [2] | t [3]; + return iorvar + total_error_4; +} diff --git a/gcc/tree-vect-slp.cc b/gcc/tree-vect-slp.cc index 7e3d0107b4e7..7d18b5bfee5d 100644 --- a/gcc/tree-vect-slp.cc +++ b/gcc/tree-vect-slp.cc @@ -9669,6 +9669,7 @@ vect_schedule_slp_node (vec_info *vinfo, si = gsi_after_labels (vinfo->bbs[0]); } else if (is_a <bb_vec_info> (vinfo) + && SLP_TREE_CODE (node) != VEC_PERM_EXPR && gimple_bb (last_stmt) != gimple_bb (stmt_info->stmt) && gimple_could_trap_p (stmt_info->stmt)) {