Somehow I managed to not see the new testcase fail. I do now. Tested on x86_64-unknown-linux-gnu, applied.
Richard. 2017-06-14 Richard Biener <rguent...@suse.de> PR tree-optimization/81083 * gcc.dg/torture/pr81083.c: Add prototypes. Index: gcc/testsuite/gcc.dg/torture/pr81083.c =================================================================== --- gcc/testsuite/gcc.dg/torture/pr81083.c (revision 249192) +++ gcc/testsuite/gcc.dg/torture/pr81083.c (working copy) @@ -1,5 +1,7 @@ /* { dg-do compile } */ +void setjmp(); +void func(); void a(int arg) { extern struct { int x; } obj;