re PR rtl-optimization/56005 (FAIL: gcc.target/i386/pr45352.c (internal compiler error))

2013-01-16  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/56005
	* sched-deps.c (sched_analyze_2): Check deps->readonly for adding
	pending reads for prefetch.

From-SVN: r195247

gcc/ChangeLog

+2013-01-16  Vladimir Makarov  <vmakarov@redhat.com>
+
+	PR rtl-optimization/56005
+	* sched-deps.c (sched_analyze_2): Check deps->readonly for adding
+	pending reads for prefetch.
+
 2013-01-16  Ian Bolton  <ian.bolton@arm.com>
 
 	* gcc/config/aarch64/aarch64.md

gcc/sched-deps.c

@@ -2719,8 +2719,9 @@ sched_analyze_2 (struct deps_desc *deps, rtx x, rtx insn)
 	 to generate accurate dependencies for prefetch insns as
 	 prefetch has only the start address but it is better to have
 	 something than nothing.  */
-      add_insn_mem_dependence (deps, true, insn,
-			       gen_rtx_MEM (Pmode, XEXP (PATTERN (insn), 0)));
+      if (!deps->readonly)
+	add_insn_mem_dependence (deps, true, insn,
+				 gen_rtx_MEM (Pmode, XEXP (PATTERN (insn), 0)));
       break;
 
     case UNSPEC_VOLATILE: