ia64.c (ia64_adjust_cost): Handle SUBREGs.

	* config/ia64/ia64.c (ia64_adjust_cost): Handle SUBREGs.

	* gcc.c-torture/compile/20011114-2.c: New test.

From-SVN: r47049

gcc/ChangeLog

@@ -10,6 +10,8 @@
 	* ifcvt.c (dead_or_predicable): Return TRUE if squeeze_notes doesn't
 	find any real instructions.
 
+	* config/ia64/ia64.c (ia64_adjust_cost): Handle SUBREGs.
+
 2001-11-15  Neil Booth  <neil@daikokuya.demon.co.uk>
 
 	* c-common.c: Include c-lex.h.

gcc/config/ia64/ia64.c

@@ -5241,17 +5241,27 @@ ia64_adjust_cost (insn, link, dep_insn, cost)
 
   src = set ? SET_SRC (set) : 0;
   addr = 0;
-  if (set && GET_CODE (SET_DEST (set)) == MEM)
-    addr = XEXP (SET_DEST (set), 0);
-  else if (set && GET_CODE (src) == MEM)
-    addr = XEXP (src, 0);
-  else if (set && GET_CODE (src) == ZERO_EXTEND
-	   && GET_CODE (XEXP (src, 0)) == MEM)
-    addr = XEXP (XEXP (src, 0), 0);
-  else if (set && GET_CODE (src) == UNSPEC
-	   && XVECLEN (XEXP (src, 0), 0) > 0
-	   && GET_CODE (XVECEXP (src, 0, 0)) == MEM)
-    addr = XEXP (XVECEXP (src, 0, 0), 0);
+  if (set)
+    {
+      if (GET_CODE (SET_DEST (set)) == MEM)
+	addr = XEXP (SET_DEST (set), 0);
+      else if (GET_CODE (SET_DEST (set)) == SUBREG
+	       && GET_CODE (SUBREG_REG (SET_DEST (set))) == MEM)
+	addr = XEXP (SUBREG_REG (SET_DEST (set)), 0);
+      else
+	{
+	  addr = src;
+	  if (GET_CODE (addr) == UNSPEC && XVECLEN (addr, 0) > 0)
+	    addr = XVECEXP (addr, 0, 0);
+	  while (GET_CODE (addr) == SUBREG || GET_CODE (addr) == ZERO_EXTEND)
+	    addr = XEXP (addr, 0);
+	  if (GET_CODE (addr) == MEM)
+	    addr = XEXP (addr, 0);
+	  else
+	    addr = 0;
+	}
+    }
+
   if (addr && GET_CODE (addr) == POST_MODIFY)
     addr = XEXP (addr, 0);
 

gcc/testsuite/ChangeLog

 2001-11-15  Jakub Jelinek  <jakub@redhat.com>
 
+	* gcc.c-torture/compile/20011114-2.c: New test.
 	* gcc.c-torture/compile/20011114-4.c: New test.
 
 2001-11-15  Nathan Sidwell  <nathan@codesourcery.com>

gcc/testsuite/gcc.c-torture/compile/20011114-2.c

+typedef struct { int c, d, e, f, g; } D;
+
+void bar (unsigned long, unsigned long);
+void foo (D *y)
+{
+  int x = 0;
+
+  if (y->f == 0)
+    x |= 0x1;
+  if (y->g == 0)
+    x |= 0x2;
+  bar ((x << 16) | (y->c & 0xffff), (y->d << 16) | (y->e & 0xffff));
+}