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

From-SVN: r191586

* rtlanal.c (dead_or_set_regno_p): Fix COND_EXEC handling.
From-SVN: r191586
10439b59 · Joern Rennecke · Joern Rennecke · 8750dfc5 · 10439b59 · 10439b59
Commit 10439b59 authored Sep 20, 2012 by Joern Rennecke Committed by Joern Rennecke Sep 20, 2012
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gcc/ChangeLog
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gcc/rtlanal.c
+2 -1

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--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
+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.

--- 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);