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Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index 1f62dca..5bcba14 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -760,6 +760,12 @@ expand_builtin_setjmp (tree arglist, rtx target) emit_label (next_lab); + /* Because setjmp and longjmp are not represented in the CFG, a cfgcleanup + may find that the basic block starting with NEXT_LAB is unreachable. + The whole block, along with NEXT_LAB, would be removed (see PR26983). + Make sure that never happens. */ + LABEL_PRESERVE_P (next_lab) = 1; + expand_builtin_setjmp_receiver (next_lab); /* Set TARGET to one. */ |