* gcc.dg/setjmp-2.c: Only run in 32-bit.

[pf3gnuchains/gcc-fork.git] / gcc / cfgrtl.c

diff --git a/gcc/cfgrtl.c b/gcc/cfgrtl.c
index f14e44e..86b2435 100644 (file)
--- a/gcc/cfgrtl.c
+++ b/gcc/cfgrtl.c
@@ -904,7 +904,7 @@ redirect_branch_edge (edge e, basic_block target)
          && GET_CODE (XEXP (SET_SRC (tmp), 2)) == LABEL_REF
          && XEXP (XEXP (SET_SRC (tmp), 2), 0) == old_label)
        {
-         XEXP (SET_SRC (tmp), 2) = gen_rtx_LABEL_REF (VOIDmode,
+         XEXP (SET_SRC (tmp), 2) = gen_rtx_LABEL_REF (Pmode,
                                                       new_label);
          --LABEL_NUSES (old_label);
          ++LABEL_NUSES (new_label);
@@ -1165,7 +1165,7 @@ force_nonfallthru (edge e)
 
 /* Redirect edge even at the expense of creating new jump insn or
    basic block.  Return new basic block if created, NULL otherwise.
-   Abort if conversion is impossible.  */
+   Conversion must be possible.  */
 
 static basic_block
 rtl_redirect_edge_and_branch_force (edge e, basic_block target)
@@ -1190,7 +1190,7 @@ rtl_tidy_fallthru_edge (edge e)
 
   /* ??? In a late-running flow pass, other folks may have deleted basic
      blocks by nopping out blocks, leaving multiple BARRIERs between here
-     and the target label. They ought to be chastized and fixed.
+     and the target label. They ought to be chastised and fixed.
 
      We can also wind up with a sequence of undeletable labels between
      one block and the next.
@@ -1277,7 +1277,7 @@ rtl_move_block_after (basic_block bb ATTRIBUTE_UNUSED,
 }
 
 /* Split a (typically critical) edge.  Return the new block.
-   Abort on abnormal edges.
+   The edge must not be abnormal.
 
    ??? The code generally expects to be called on critical edges.
    The case of a block ending in an unconditional jump to a
@@ -2428,9 +2428,12 @@ purge_dead_edges (basic_block bb)
   if (!found)
     return purged;
 
+  /* Remove all but the fake and fallthru edges.  The fake edge may be
+     the only successor for this block in the case of noreturn
+     calls.  */
   for (ei = ei_start (bb->succs); (e = ei_safe_edge (ei)); )
     {
-      if (!(e->flags & EDGE_FALLTHRU))
+      if (!(e->flags & (EDGE_FALLTHRU | EDGE_FAKE)))
        {
          bb->flags |= BB_DIRTY;
          remove_edge (e);
@@ -2695,7 +2698,8 @@ cfg_layout_can_merge_blocks_p (basic_block a, basic_block b)
                  ? simplejump_p (BB_END (a)) : onlyjump_p (BB_END (a)))));
 }
 
-/* Merge block A and B, abort when it is not possible.  */
+/* Merge block A and B.  The blocks must be mergeable.  */
+
 static void
 cfg_layout_merge_blocks (basic_block a, basic_block b)
 {