From: Michael Beck <beck@ipd.info.uni-karlsruhe.de>
Date: Thu, 8 Sep 2005 14:45:21 +0000 (+0000)
Subject: BugFix: Unreachable Blocks are always leader blocks
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;h=79e7ff30e109e527ea23d353bdbed97ed45a5be4;p=libfirm

BugFix: Unreachable Blocks are always leader blocks

[r6604]
---

diff --git a/ir/ana/irextbb.c b/ir/ana/irextbb.c
index c22aba1a1..68fe2e060 100644
--- a/ir/ana/irextbb.c
+++ b/ir/ana/irextbb.c
@@ -68,10 +68,11 @@ static void pre_walk_calc_extbb(ir_node *block, void *ctx)
   int n = get_Block_n_cfgpreds(block);
   env_t *env = ctx;
 
-  if (n > 1 || block == get_irg_start_block(current_ir_graph)) {
+  if (n <= 0 || n > 1 || block == get_irg_start_block(current_ir_graph)) {
     /*
      * block is a JOIN-node ie he control flow from
      * many other blocks joins here. block is a leader.
+     * Note that we handle unreachable blocks (n <= 0) here too.
      */
     allocate_extblk(block, env);
   }