https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80171
--- Comment #4 from Deniz Bahadir <D.Bahadir at GMX dot de> --- Created attachment 41043 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41043&action=edit Non-reduced test-case which fails with -O2 and -O3. This was the original test-case which did not fail with "-O1" but with "-O2" and "-O3".(The original production-code, however, only failed with "-O3". I am not sure, if I am able to provide it.) The error: ---------- LANG=C /usr/bin/g++-6 -fpermissive -m64 -D_GLIBCXX_USE_CXX11_ABI=1 -std=c++14 -O3 -DNDEBUG -fPIC -c -w testcase.orig.i -o /dev/null testcase.orig.i: In function 'void padis::isislistener::test()': testcase.orig.i:67462:6: internal compiler error: Segmentation fault void test() ^~~~ 0xad48ef crash_signal ../../src/gcc/toplev.c:333 0xde8f98 generic_simplify_VIEW_CONVERT_EXPR /build/gcc-6-_9B9T1/gcc-6-6.2.0/build/gcc/generic-match.c:7580 0xde8f98 generic_simplify(unsigned int, tree_code, tree_node*, tree_node*) /build/gcc-6-_9B9T1/gcc-6-6.2.0/build/gcc/generic-match.c:9055 0x89a9cb fold_unary_loc(unsigned int, tree_code, tree_node*, tree_node*) ../../src/gcc/fold-const.c:7704 0x8cd81c fold_ctor_reference(tree_node*, tree_node*, unsigned long, unsigned long, tree_node*) ../../src/gcc/gimple-fold.c:5508 0x8cdafa fold_array_ctor_reference ../../src/gcc/gimple-fold.c:5415 0x8cdafa fold_ctor_reference(tree_node*, tree_node*, unsigned long, unsigned long, tree_node*) ../../src/gcc/gimple-fold.c:5533 0xc1056f fully_constant_vn_reference_p(vn_reference_s*) ../../src/gcc/tree-ssa-sccvn.c:1372 0xc1357b vn_reference_lookup(tree_node*, tree_node*, vn_lookup_kind, vn_reference_s**, bool) ../../src/gcc/tree-ssa-sccvn.c:2261 0xc164a9 visit_reference_op_load ../../src/gcc/tree-ssa-sccvn.c:3362 0xc164a9 visit_use ../../src/gcc/tree-ssa-sccvn.c:3755 0xc184b5 process_scc ../../src/gcc/tree-ssa-sccvn.c:3975 0xc184b5 extract_and_process_scc_for_name ../../src/gcc/tree-ssa-sccvn.c:4062 0xc184b5 DFS ../../src/gcc/tree-ssa-sccvn.c:4114 0xc18d17 sccvn_dom_walker::before_dom_children(basic_block_def*) ../../src/gcc/tree-ssa-sccvn.c:4596 0x1059e02 dom_walker::walk(basic_block_def*) ../../src/gcc/domwalk.c:265 0xc19b02 run_scc_vn(vn_lookup_kind) ../../src/gcc/tree-ssa-sccvn.c:4707 0xbf2d24 execute ../../src/gcc/tree-ssa-pre.c:4910 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <file:///usr/share/doc/gcc-6/README.Bugs> for instructions.
