From 8403001eb9f3b54aa6c375d98ceb8d30c5cd0cf9 Mon Sep 17 00:00:00 2001
From: wilson <wilson@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 12 Sep 2000 19:06:05 +0000
Subject: Fix ia64-linux glibc intl/loadmsgcat.c miscompilation. 	*
 ifcvt.c (noce_process_if_block): If A and B are the same, and no 	else
 block, and X has side-effects, then fail.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@36373 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/ifcvt.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'gcc/ifcvt.c')

diff --git a/gcc/ifcvt.c b/gcc/ifcvt.c
index 901bd42b483..3ca0e6ccc65 100644
--- a/gcc/ifcvt.c
+++ b/gcc/ifcvt.c
@@ -1247,6 +1247,11 @@ noce_process_if_block (test_bb, then_bb, else_bb, join_bb)
 	  reorder_insns (insn_b, insn_b, PREV_INSN (if_info.cond_earliest));
 	  insn_b = NULL_RTX;
 	}
+      /* If we have "x = b; if (...) x = a;", and x has side-effects, then
+	 x must be executed twice.  */
+      else if (insn_b && side_effects_p (orig_x))
+	return FALSE;
+	
       x = orig_x;
       goto success;
     }
-- 
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