m68k.md (extendsidi2, [...]): Merge, clean up.

	* config/m68k/m68k.md (extendsidi2, extendsidi2_mem): Merge, clean up.
	Disable unsupported alternative for ColdFire,
	add new alternative that ColdFire can handle.

	* gcc.c-torture/compile/20080929-1.c: New.

From-SVN: r142205

1 files changed, 19 insertions, 16 deletions

diff --git a/gcc/config/m68k/m68k.md b/gcc/config/m68k/m68k.md
index 29624a4..782c7cc 100644
--- a/gcc/config/m68k/m68k.md
+++ b/gcc/config/m68k/m68k.md
@@ -1703,32 +1703,35 @@
 })
 
 (define_insn "extendsidi2"
-  [(set (match_operand:DI 0 "register_operand" "=d")
-	(sign_extend:DI (match_operand:SI 1 "nonimmediate_src_operand" "rm")))]
+  [(set (match_operand:DI 0 "nonimmediate_operand" "=d,o,o,<")
+	(sign_extend:DI
+	 (match_operand:SI 1 "nonimmediate_src_operand" "rm,rm,r<Q>,rm")))
+   (clobber (match_scratch:SI 2 "=X,d,d,d"))]
   ""
 {
   CC_STATUS_INIT;
-  if (TARGET_68020 || TARGET_COLDFIRE)
-    return "move%.l %1,%R0\;smi %0\;extb%.l %0";
-  else
-    return "move%.l %1,%R0\;smi %0\;ext%.w %0\;ext%.l %0";
-})
 
-(define_insn "*extendsidi2_mem"
-  [(set (match_operand:DI 0 "memory_operand" "=o,<")
-	(sign_extend:DI (match_operand:SI 1 "nonimmediate_src_operand" "rm,rm")))
-   (clobber (match_scratch:SI 2 "=d,d"))]
-   ""
-{
-  CC_STATUS_INIT;
+  if (which_alternative == 0)
+    /* Handle alternative 0.  */
+    {
+      if (TARGET_68020 || TARGET_COLDFIRE)
+        return "move%.l %1,%R0\;smi %0\;extb%.l %0";
+      else
+        return "move%.l %1,%R0\;smi %0\;ext%.w %0\;ext%.l %0";
+    }
+
+  /* Handle alternatives 1, 2 and 3.  We don't need to adjust address by 4
+     in alternative 3 because autodecrement will do that for us.  */
   operands[3] = adjust_address (operands[0], SImode,
-				which_alternative == 0 ? 4 : 0);
+				which_alternative == 3 ? 0 : 4);
   operands[0] = adjust_address (operands[0], SImode, 0);
+
   if (TARGET_68020 || TARGET_COLDFIRE)
     return "move%.l %1,%3\;smi %2\;extb%.l %2\;move%.l %2,%0";
   else
     return "move%.l %1,%3\;smi %2\;ext%.w %2\;ext%.l %2\;move%.l %2,%0";
-})
+}
+  [(set_attr "ok_for_coldfire" "yes,no,yes,yes")])
 
 ;; Special case when one can avoid register clobbering, copy and test
 ;; Maybe there is a way to make that the general case, by forcing the