https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77862
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> --- ==8593== Invalid read of size 8 ==8593== at 0x10E0E64: add_equivalence(bitmap_head**, tree_node const*) (tree-vrp.c:845) ==8593== by 0x10E29BE: extract_range_for_var_from_comparison_expr(tree_node*, tree_code, tree_node*, tree_node*, value_range*) (tree-vrp.c:1538) ==8593== by 0x110244D: evrp_dom_walker::before_dom_children(basic_block_def*) (tree-vrp.c:10685) ==8593== by 0x1681362: dom_walker::walk(basic_block_def*) (domwalk.c:265) ==8593== by 0x1102EC4: execute_early_vrp() (tree-vrp.c:10878) ==8593== by 0x110344A: (anonymous namespace)::pass_early_vrp::execute(function*) (tree-vrp.c:11107) ==8593== by 0xCF45D2: execute_one_pass(opt_pass*) (passes.c:2340) ==8593== by 0xCF4923: execute_pass_list_1(opt_pass*) (passes.c:2429) ==8593== by 0xCF4954: execute_pass_list_1(opt_pass*) (passes.c:2430) ==8593== by 0xCF49AC: execute_pass_list(function*, opt_pass*) (passes.c:2440) ==8593== by 0xCF2EF4: do_per_function_toporder(void (*)(function*, void*), void*) (passes.c:1728) ==8593== by 0xCF5595: execute_ipa_pass_list(opt_pass*) (passes.c:2782) ==8593== Address 0x6514680 is 0 bytes after a block of size 80 alloc'd ==8593== at 0x4C2F0F5: calloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==8593== by 0x183AFD0: xcalloc (xmalloc.c:163) ==8593== by 0x10F659B: vrp_initialize_lattice() (tree-vrp.c:7002) ==8593== by 0x1102E9B: execute_early_vrp() (tree-vrp.c:10874) ==8593== by 0x110344A: (anonymous namespace)::pass_early_vrp::execute(function*) (tree-vrp.c:11107) ==8593== by 0xCF45D2: execute_one_pass(opt_pass*) (passes.c:2340) ==8593== by 0xCF4923: execute_pass_list_1(opt_pass*) (passes.c:2429) ==8593== by 0xCF4954: execute_pass_list_1(opt_pass*) (passes.c:2430) ==8593== by 0xCF49AC: execute_pass_list(function*, opt_pass*) (passes.c:2440) ==8593== by 0xCF2EF4: do_per_function_toporder(void (*)(function*, void*), void*) (passes.c:1728) ==8593== by 0xCF5595: execute_ipa_pass_list(opt_pass*) (passes.c:2782) ==8593== by 0x93977E: ipa_passes() (cgraphunit.c:2278)
