https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108314
Bug ID: 108314 Summary: [13 Regression] Segfault in gimple-match-head.cc:do_valueize when vectorizing for SVE Product: gcc Version: 12.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: acoplan at gcc dot gnu.org Target Milestone: --- The following appears to be a regression on the trunk: $ cat t.c int x, y, z; void f(void) { int t = 4; for (; x; x++) { if (y) continue; t = 0; } z = t; } $ aarch64-none-elf-gcc -c t.c -O2 -march=armv9-a during GIMPLE pass: vect t.c: In function 'f': t.c:2:6: internal compiler error: Segmentation fault 2 | void f(void) { | ^ 0xed3a4f crash_signal /home/alecop01/toolchain/src/gcc/gcc/toplev.cc:314 0x17255c4 do_valueize /home/alecop01/toolchain/src/gcc/gcc/gimple-match-head.cc:845 0x17255c4 operator() /home/alecop01/toolchain/src/gcc/gcc/gimple-match-head.cc:1071 0x17255c4 gimple_extract<gimple_simplify(gimple*, gimple_match_op*, gimple**, tree_node* (*)(tree), tree_node* (*)(tree))::<lambda(tree)>, gimple_simplify(gimple*, gimple_match_op*, gimple**, tree_node* (*)(tree), tree_node* (*)(tree))::<lambda(tree)> > /home/alecop01/toolchain/src/gcc/gcc/gimple-match-head.cc:1028 0x17255c4 gimple_simplify(gimple*, gimple_match_op*, gimple**, tree_node* (*)(tree_node*), tree_node* (*)(tree_node*)) /home/alecop01/toolchain/src/gcc/gcc/gimple-match-head.cc:1103 0xb239b6 gimple_fold_stmt_to_constant_1(gimple*, tree_node* (*)(tree_node*), tree_node* (*)(tree_node*)) /home/alecop01/toolchain/src/gcc/gcc/gimple-fold.cc:7441 0x113d196 visit_stmt /home/alecop01/toolchain/src/gcc/gcc/tree-ssa-sccvn.cc:6134 0x113dcee process_bb /home/alecop01/toolchain/src/gcc/gcc/tree-ssa-sccvn.cc:7844 0x1140b4d do_rpo_vn_1 /home/alecop01/toolchain/src/gcc/gcc/tree-ssa-sccvn.cc:8443 0x114127c do_rpo_vn(function*, edge_def*, bitmap_head*, bool, bool, vn_lookup_kind) /home/alecop01/toolchain/src/gcc/gcc/tree-ssa-sccvn.cc:8545 0x123c0ce execute /home/alecop01/toolchain/src/gcc/gcc/tree-vectorizer.cc:1388 Please submit a full bug report, with preprocessed source (by using -freport-bug). Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions.