https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79471
Bug ID: 79471 Summary: valgrind error for gcc.c-torture/compile/limits-fnargs.c Product: gcc Version: 7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: dcb314 at hotmail dot com Target Milestone: --- I just built a valgrind version of gcc trunk and tried out the gcc testsuite on it. For testcase gcc.c-torture/compile/limits-fnargs.c, I got ./gcc.c-torture/compile/limits-fnargs.c ==21687== Invalid write of size 8 ==21687== at 0x6F33B9: expand_call(tree_node*, rtx_def*, int) (calls.c:3266) ==21687== by 0x7DFF36: expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool) (expr.c:10785) ==21687== by 0x703E54: expand_expr (expr.h:276) ==21687== by 0x703E54: expand_call_stmt (cfgexpand.c:2658) Admittedly an extreme case, but I think gcc shouldn't be doing invalid writes.