https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93683
Bug ID: 93683 Summary: [10 Regression] ICE in ao_ref_init_from_ptr_and_size, at tree-ssa-alias.c:714 Product: gcc Version: 10.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: gs...@t-online.de Target Milestone: --- Changed between 20190623 and 20190630 : $ cat z1.c void f (int *a) { *a = 0; __builtin_calloc(1, 1); } $ gcc-10-20200209 -c z1.c -O2 z1.c: In function 'f': z1.c:4:3: warning: ignoring return value of '__builtin_calloc' declared with attribute 'warn_unused_result' [-Wunused-result] 4 | __builtin_calloc(1, 1); | ^~~~~~~~~~~~~~~~~~~~~~ during GIMPLE pass: dse z1.c:5:1: internal compiler error: Segmentation fault 5 | } | ^ 0xb0531f crash_signal ../../gcc/toplev.c:328 0xbd1f5a ao_ref_init_from_ptr_and_size(ao_ref*, tree_node*, tree_node*) ../../gcc/tree-ssa-alias.c:714 0xbd6d91 stmt_kills_ref_p(gimple*, ao_ref*) ../../gcc/tree-ssa-alias.c:3280 0xbf50ca dse_classify_store(ao_ref*, gimple*, bool, simple_bitmap_def*, bool*, tree_node*) ../../gcc/tree-ssa-dse.c:857 0xbf6685 dse_dom_walker::dse_optimize_stmt(gimple_stmt_iterator*) ../../gcc/tree-ssa-dse.c:1102 0xbf6ce8 dse_dom_walker::before_dom_children(basic_block_def*) ../../gcc/tree-ssa-dse.c:1134 0x12c7bd4 dom_walker::walk(basic_block_def*) ../../gcc/domwalk.c:309 0xbf4643 execute ../../gcc/tree-ssa-dse.c:1188