cse.c (cse_insn): Check that the tentative replacement was successfully forced to memory before...

	* cse.c (cse_insn) [src_folded]: Check that the tentative replacement
	was successfully forced to memory before using the result.

From-SVN: r72635

gcc/ChangeLog

 2003-10-18  Eric Botcazou  <ebotcazou@libertysurf.fr>
 
+	* cse.c (cse_insn) [src_folded]: Check that the tentative replacement
+	was successfully forced to memory before using the result.
+
+2003-10-18  Eric Botcazou  <ebotcazou@libertysurf.fr>
+
 	PR optimization/8178
 	* config/i386/i386.md (*movsi_zero): New insn to set
 	a register to zero on TARGET_USE_MOV0 targets.

gcc/cse.c

@@ -5416,7 +5416,11 @@ cse_insn (rtx insn, rtx libcall_insn)
 	    {
 	      trial = src_folded, src_folded_cost = MAX_COST;
 	      if (src_folded_force_flag)
-		trial = force_const_mem (mode, trial);
+		{
+		  rtx forced = force_const_mem (mode, trial);
+		  if (forced)
+		    trial = forced;
+		}
 	    }
 	  else if (src
 		   && preferrable (src_cost, src_regcost,