diff options
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index cbf9acd55de..3d746814298 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -649,7 +649,7 @@ void expand_builtin_longjmp (buf_addr, value) rtx buf_addr, value; { - rtx fp, lab, stack; + rtx fp, lab, stack, insn; enum machine_mode sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL); if (setjmp_alias_set == -1) @@ -706,6 +706,18 @@ expand_builtin_longjmp (buf_addr, value) emit_indirect_jump (lab); } } + + /* Search backwards and mark the jump insn as a non-local goto. + Note that this precludes the use of __builtin_longjmp to a + __builtin_setjmp target in the same function. However, we've + already cautioned the user that these functions are for + internal exception handling use only. */ + for (insn = get_last_insn (); + GET_CODE (insn) != JUMP_INSN; + insn = PREV_INSN (insn)) + continue; + REG_NOTES (insn) = alloc_EXPR_LIST (REG_NON_LOCAL_GOTO, const0_rtx, + REG_NOTES (insn)); } /* Get a MEM rtx for expression EXP which is the address of an operand |
