https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125872
--- Comment #2 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The trunk branch has been updated by Richard Sandiford <[email protected]>: https://gcc.gnu.org/g:295e83641d0db2b9bce71447d9d4951317e8e0ad commit r17-1664-g295e83641d0db2b9bce71447d9d4951317e8e0ad Author: Richard Sandiford <[email protected]> Date: Thu Jun 18 16:54:08 2026 +0100 backprop: Don't try to delete default defs [PR125872] In this PR, -fno-tree-dce meant that backprop was presented with code that was completely dead. The pass's internal DCE then tried to delete the function parameter's definition. gcc/ PR tree-optimization/125872 * gimple-ssa-backprop.cc (backprop::execute): Don't try to delete default definitions. gcc/testsuite/ PR tree-optimization/125872 * gcc.dg/torture/pr125872.c: New test.
