diff options
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index a555e4f..9891978 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -5298,6 +5298,17 @@ expand_builtin_trap (void) emit_barrier (); } +/* Expand a call to __builtin_unreachable. We do nothing except emit + a barrier saying that control flow will not pass here. + + It is the responsibility of the program being compiled to ensure + that control flow does never reach __builtin_unreachable. */ +static void +expand_builtin_unreachable (void) +{ + emit_barrier (); +} + /* Expand EXP, a call to fabs, fabsf or fabsl. Return NULL_RTX if a normal call should be emitted rather than expanding the function inline. If convenient, the result should be placed @@ -6795,6 +6806,10 @@ expand_builtin (tree exp, rtx target, rtx subtarget, enum machine_mode mode, expand_builtin_trap (); return const0_rtx; + case BUILT_IN_UNREACHABLE: + expand_builtin_unreachable (); + return const0_rtx; + case BUILT_IN_PRINTF: target = expand_builtin_printf (exp, target, mode, false); if (target) |