Index: gcc/cse.c
===================================================================
--- gcc/cse.c	2011-02-02 10:53:50.000000000 +0000
+++ gcc/cse.c	2011-02-10 13:16:42.000000000 +0000
@@ -6634,9 +6634,10 @@ count_reg_usage (rtx x, int *counts, rtx
     case CALL_INSN:
     case INSN:
     case JUMP_INSN:
-      /* We expect dest to be NULL_RTX here.  If the insn may trap, mark
-         this fact by setting DEST to pc_rtx.  */
-      if (insn_could_throw_p (x))
+      /* We expect dest to be NULL_RTX here.  If the insn may trap,
+	 or if it cannot be deleted due to side-effects, mark this fact
+	 by setting DEST to pc_rtx.  */
+      if (insn_could_throw_p (x) || side_effects_p (PATTERN (x)))
 	dest = pc_rtx;
       if (code == CALL_INSN)
 	count_reg_usage (CALL_INSN_FUNCTION_USAGE (x), counts, dest, incr);
@@ -6676,10 +6677,6 @@ count_reg_usage (rtx x, int *counts, rtx
       return;
 
     case ASM_OPERANDS:
-      /* If the asm is volatile, then this insn cannot be deleted,
-	 and so the inputs *must* be live.  */
-      if (MEM_VOLATILE_P (x))
-	dest = NULL_RTX;
       /* Iterate over just the inputs, not the constraints as well.  */
       for (i = ASM_OPERANDS_INPUT_LENGTH (x) - 1; i >= 0; i--)
 	count_reg_usage (ASM_OPERANDS_INPUT (x, i), counts, dest, incr);