* rtlanal.c (dead_or_set_regno_p): Fix COND_EXEC handling.

From-SVN: r191586

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e6fd4da9cbcdeef3ddb49c7b05d4d35a959bd7bb..835d17b6f7d6ae9c3bc6da6287eb3a111d676561 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2012-09-20  Joern Rennecke  <joern.rennecke@embecosm.com>
+
+       * rtlanal.c (dead_or_set_regno_p): Fix COND_EXEC handling.
+
 2012-09-20  Marek Polacek  <polacek@redhat.com>
 
        * tree-ssa-operands.c (get_expr_operands): Merge identical cases.

diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c
index 89ca226ccab1b182e4a391da88f04bc7afd9e3c0..fb7d45cfb9616bd1f4012f10209c16533fd02c46 100644 (file)
--- a/gcc/rtlanal.c
+++ b/gcc/rtlanal.c
@@ -1701,8 +1701,9 @@ dead_or_set_regno_p (const_rtx insn, unsigned int test_regno)
 
   pattern = PATTERN (insn);
 
+  /* If a COND_EXEC is not executed, the value survives.  */
   if (GET_CODE (pattern) == COND_EXEC)
-    pattern = COND_EXEC_CODE (pattern);
+    return 0;
 
   if (GET_CODE (pattern) == SET)
     return covers_regno_p (SET_DEST (pattern), test_regno);