re PR target/43766 (x86 prefetch doesn't use complex memory addressing)

	PR target/43766
	* config/i386/i386.c (ix86_decompose_address): Handle ASHIFT addends.

testsuite/ChangeLog:

	PR target/43766
	* gcc.target/i386/pr43766.c: New test.

From-SVN: r158515

gcc/ChangeLog

+2010-04-19  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/43766
+	* config/i386/i386.c (ix86_decompose_address): Handle ASHIFT addends.
+
 2010-04-19  Jie Zhang  <jie@codesourcery.com>
 
 	PR target/43662
-	* reginfo.c (reinit_regs): Set caller_save_initialized_p
-	to false.
+	* reginfo.c (reinit_regs): Set caller_save_initialized_p to false.
 
 2010-04-19 Ira Rosen <irar@il.ibm.com>
 
@@ -82,10 +86,10 @@
 	(sse_prologue_save_insn1): New pattern and splitter.
 	(sse_prologue_save_insn): Update to deal also with 64bit aligned
 	blocks.
-	* i386.c (setup_incoming_varargs_64): Do not compute jump destination here.
+	* i386.c (setup_incoming_varargs_64): Do not compute jump
+	destination here.
 	(ix86_gimplify_va_arg): Update alignment needed.
-	(ix86_local_alignment): Do not align all local arrays
-	to 128bit.
+	(ix86_local_alignment): Do not align all local arrays to 128bit.
 
 2010-04-17  Jan Hubicka  <jh@suse.cz>
 

gcc/config/i386/i386.c

@@ -9357,6 +9357,7 @@ ix86_decompose_address (rtx addr, struct ix86_address *out)
   rtx base_reg, index_reg;
   HOST_WIDE_INT scale = 1;
   rtx scale_rtx = NULL_RTX;
+  rtx tmp;
   int retval = 1;
   enum ix86_address_seg seg = SEG_DEFAULT;
 
@@ -9392,6 +9393,19 @@ ix86_decompose_address (rtx addr, struct ix86_address *out)
 	      scale_rtx = XEXP (op, 1);
 	      break;
 
+	    case ASHIFT:
+	      if (index)
+		return 0;
+	      index = XEXP (op, 0);
+	      tmp = XEXP (op, 1);
+	      if (!CONST_INT_P (tmp))
+		return 0;
+	      scale = INTVAL (tmp);
+	      if ((unsigned HOST_WIDE_INT) scale > 3)
+		return 0;
+	      scale = 1 << scale;
+	      break;
+
 	    case UNSPEC:
 	      if (XINT (op, 1) == UNSPEC_TP
 	          && TARGET_TLS_DIRECT_SEG_REFS
@@ -9432,8 +9446,6 @@ ix86_decompose_address (rtx addr, struct ix86_address *out)
     }
   else if (GET_CODE (addr) == ASHIFT)
     {
-      rtx tmp;
-
       /* We're called for lea too, which implements ashift on occasion.  */
       index = XEXP (addr, 0);
       tmp = XEXP (addr, 1);

gcc/testsuite/ChangeLog

+2010-04-19  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/43766
+	* gcc.target/i386/pr43766.c: New test.
+
 2010-04-19  Jie Zhang  <jie@codesourcery.com>
 
 	PR target/43662

gcc/testsuite/gcc.target/i386/pr43766.c

+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+/* { dg-options "-O2 -msse -mregparm=3" { target ilp32 } } */
+
+void p (int *a, int i)
+{
+  __builtin_prefetch (&a[i]);
+}
+
+/* { dg-final { scan-assembler-not "lea" } } */