https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102310
Martin Liška <marxin at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Last reconfirmed| |2021-09-14 Ever confirmed|0 |1 Status|UNCONFIRMED |NEW CC| |julian at codesourcery dot com --- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> --- Confirmed. Well, I'm not sure it's about IPA modref, the test-case fails even w/o any optimization level: $ gcc pr102310.f90 -c -fopenacc during RTL pass: expand pr102310.f90:22:41: 22 | K = IDX(I) + ABC * BB%Y%X | ^ internal compiler error: in expand_expr_real_1, at expr.c:10599 0x6be64a expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool) /home/marxin/Programming/gcc/gcc/expr.c:10599 0xbd7ac6 store_expr(tree_node*, rtx_def*, int, bool, bool) /home/marxin/Programming/gcc/gcc/expr.c:6103 0xbd933d expand_assignment(tree_node*, tree_node*, bool) /home/marxin/Programming/gcc/gcc/expr.c:5835 0xa9a75a expand_gimple_stmt_1 /home/marxin/Programming/gcc/gcc/cfgexpand.c:3942 0xa9a75a expand_gimple_stmt /home/marxin/Programming/gcc/gcc/cfgexpand.c:4040 0xaa1070 expand_gimple_basic_block /home/marxin/Programming/gcc/gcc/cfgexpand.c:6082 0xaa2fb7 execute /home/marxin/Programming/gcc/gcc/cfgexpand.c:6808 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions. Is it really a valid test-case? Happens since r10-5597-g549188ea10757060.