Hi, there's a superfluous break in a switch in tree.c, which together with the object clobbers confuses our warning machinery at -O0, leading to a bootstrap fail for Tom. As we have testcases for that already in PR20681 there's no need in GCCs source base itself to contain something like this.
Hence this patch. Regstrapped on x86_64-linux, no regressions. Checked in as r181615. Ciao, Michael. PR c++/51264 * tree.c (iterative_hash_expr): Remove break after return. Index: tree.c =================================================================== --- tree.c (revision 181582) +++ tree.c (working copy) @@ -6994,7 +6994,6 @@ iterative_hash_expr (const_tree t, hashv val = iterative_hash_expr (TREE_OPERAND (t, i), val); } return val; - break; } }