https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109301
Bug ID: 109301 Summary: [13 Regression] ICE in format_helper, at real.h:233 Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: gs...@t-online.de Target Milestone: --- Started between 20220717 and 20220724, at -Ofast : $ cat z1.c double x[256]; void f (void) { int i, j; for (i=0; i<256; ++i) for (j=0; j<8; ++j) x[i] = __builtin_pow (x[i], 0.5); } $ gcc-13-20230326 -c z1.c -Ofast during GIMPLE pass: cunroll z1.c: In function 'f': z1.c:2:6: internal compiler error: in format_helper, at real.h:233 2 | void f (void) | ^ 0x94a671 format_helper::format_helper<machine_mode>(machine_mode const&) ../../gcc/real.h:233 0x94a671 const_binop ../../gcc/fold-const.cc:1340 0x94b027 const_binop(tree_code, tree_node*, tree_node*, tree_node*) ../../gcc/fold-const.cc:1761 0x10e23d8 gimple_resimplify2 ../../gcc/gimple-match-head.cc:280 0x10e258a gimple_match_op::resimplify(gimple**, tree_node* (*)(tree_node*)) ../../gcc/gimple-match-head.cc:516 0x1206eb8 gimple_simplify_CFN_POW .../gcc-13-20230326/zzz_rel/gcc/gimple-match.cc:188875 0x10e1112 gimple_simplify .../gcc-13-20230326/zzz_rel/gcc/gimple-match.cc:211319 0x10e22ca gimple_resimplify2 ../../gcc/gimple-match-head.cc:323 0x10e258a gimple_match_op::resimplify(gimple**, tree_node* (*)(tree_node*)) ../../gcc/gimple-match-head.cc:516 0x10fd1c0 gimple_simplify_CFN_SQRT .../gcc-13-20230326/zzz_rel/gcc/gimple-match.cc:87171 0x12a7aa7 gimple_simplify .../gcc-13-20230326/zzz_rel/gcc/gimple-match.cc:95836 0x12a8dc9 gimple_resimplify1 ../../gcc/gimple-match-head.cc:246 0x10e259a gimple_match_op::resimplify(gimple**, tree_node* (*)(tree_node*)) ../../gcc/gimple-match-head.cc:514 0x12a8f86 gimple_simplify(gimple*, gimple_match_op*, gimple**, tree_node* (*)(tree_node*), tree_node* (*)(tree_node*)) ../../gcc/gimple-match-head.cc:1115 0x99029d fold_stmt_1 ../../gcc/gimple-fold.cc:6251 0xe234f8 eliminate_dom_walker::eliminate_stmt(basic_block_def*, gimple_stmt_iterator*) ../../gcc/tree-ssa-sccvn.cc:7062 0xe298b7 process_bb ../../gcc/tree-ssa-sccvn.cc:8050 0xe2ad95 do_rpo_vn_1 ../../gcc/tree-ssa-sccvn.cc:8501 0xe2bdc9 do_rpo_vn(function*, edge_def*, bitmap_head*, bool, bool, vn_lookup_kind) ../../gcc/tree-ssa-sccvn.cc:8603 0xd9b03d tree_unroll_loops_completely ../../gcc/tree-ssa-loop-ivcanon.cc:1485