diff options
Diffstat (limited to 'gcc/cfg.c')
| -rw-r--r-- | gcc/cfg.c | 28 |
1 files changed, 22 insertions, 6 deletions
@@ -64,9 +64,16 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA #include "function.h" #include "except.h" #include "toplev.h" - +#include "tm_p.h" #include "obstack.h" + +/* Stubs in case we haven't got a return insn. */ +#ifndef HAVE_return +#define HAVE_return 0 +#define gen_return() NULL_RTX +#endif + /* The obstack on which the flow graph components are allocated. */ struct obstack flow_obstack; @@ -1249,7 +1256,6 @@ force_nonfallthru_and_redirect (e, target) basic_block jump_block, new_bb = NULL; rtx note; edge new_edge; - rtx label; if (e->flags & EDGE_ABNORMAL) abort (); @@ -1290,10 +1296,20 @@ force_nonfallthru_and_redirect (e, target) else jump_block = e->src; e->flags &= ~EDGE_FALLTHRU; - label = block_label (target); - emit_jump_insn_after (gen_jump (label), jump_block->end); - JUMP_LABEL (jump_block->end) = label; - LABEL_NUSES (label)++; + if (target == EXIT_BLOCK_PTR) + { + if (HAVE_return) + emit_jump_insn_after (gen_return (), jump_block->end); + else + abort (); + } + else + { + rtx label = block_label (target); + emit_jump_insn_after (gen_jump (label), jump_block->end); + JUMP_LABEL (jump_block->end) = label; + LABEL_NUSES (label)++; + } emit_barrier_after (jump_block->end); redirect_edge_succ_nodup (e, target); |