PR target/59229

	* config/i386/i386.c (device_alg): Fix up formatting.
	(ix86_expand_set_or_movmem): Handle max_size < epilogue_size_needed
	similarly to count && count < epilogue_size_needed.  Fix up
	comment typo.
	* builtins.c (determine_block_size): Fix comment typo.

	* gcc.c-torture/execute/pr59229.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@205416 138bc75d-0d04-0410-961f-82ee72b054a4

gcc/ChangeLog

@@ -1,5 +1,12 @@
 2013-11-26  Jakub Jelinek  <jakub@redhat.com>
 
+	PR target/59229
+	* config/i386/i386.c (device_alg): Fix up formatting.
+	(ix86_expand_set_or_movmem): Handle max_size < epilogue_size_needed
+	similarly to count && count < epilogue_size_needed.  Fix up
+	comment typo.
+	* builtins.c (determine_block_size): Fix comment typo.
+
 	PR sanitizer/59258
 	* ubsan.c (ubsan_source_location): Don't add any location
 	to ADDR_EXPR in the ctor.  Revert 2013-11-22 change.

gcc/builtins.c

@@ -3142,7 +3142,7 @@ determine_block_size (tree len, rtx len_rtx,
 	}
       else if (range_type == VR_ANTI_RANGE)
 	{
-	  /* Anti range 0...N lets us to determine minmal size to N+1.  */
+	  /* Anti range 0...N lets us to determine minimal size to N+1.  */
 	  if (min.is_zero ())
 	    {
 	      if ((max + double_int_one).fits_uhwi ())
@@ -3152,7 +3152,7 @@ determine_block_size (tree len, rtx len_rtx,
 
 	     int n;
 	     if (n < 100)
-	       memcpy (a,b, n)
+	       memcpy (a, b, n)
 
 	     Produce anti range allowing negative values of N.  We still
 	     can use the information and make a guess that N is not negative.

gcc/config/i386/i386.c

@@ -23453,7 +23453,8 @@ decide_alg (HOST_WIDE_INT count, HOST_WIDE_INT expected_size,
   /* If expected size is not known but max size is small enough
      so inline version is a win, set expected size into
      the range.  */
-  if (max > 1 && (unsigned HOST_WIDE_INT)max >= max_size && expected_size == -1)
+  if (max > 1 && (unsigned HOST_WIDE_INT) max >= max_size
+      && expected_size == -1)
     expected_size = min_size / 2 + max_size / 2;
 
   /* If user specified the algorithm, honnor it if possible.  */
@@ -23752,7 +23753,7 @@ ix86_expand_set_or_movmem (rtx dst, rtx src, rtx count_exp, rtx val_exp,
   bool noalign;
   enum machine_mode move_mode = VOIDmode;
   int unroll_factor = 1;
-  /* TODO: Once vlaue ranges are available, fill in proper data.  */
+  /* TODO: Once value ranges are available, fill in proper data.  */
   unsigned HOST_WIDE_INT min_size = 0;
   unsigned HOST_WIDE_INT max_size = -1;
   unsigned HOST_WIDE_INT probable_max_size = -1;
@@ -23967,21 +23968,19 @@ ix86_expand_set_or_movmem (rtx dst, rtx src, rtx count_exp, rtx val_exp,
 	 loop variant.  */
       if (issetmem && epilogue_size_needed > 2 && !promoted_val)
 	force_loopy_epilogue = true;
-      if (count)
+      if ((count && count < (unsigned HOST_WIDE_INT) epilogue_size_needed)
+	  || max_size < (unsigned HOST_WIDE_INT) epilogue_size_needed)
 	{
-	  if (count < (unsigned HOST_WIDE_INT)epilogue_size_needed)
-	    {
-	      /* If main algorithm works on QImode, no epilogue is needed.
-		 For small sizes just don't align anything.  */
-	      if (size_needed == 1)
-		desired_align = align;
-	      else
-		goto epilogue;
-	    }
+	  /* If main algorithm works on QImode, no epilogue is needed.
+	     For small sizes just don't align anything.  */
+	  if (size_needed == 1)
+	    desired_align = align;
+	  else
+	    goto epilogue;
 	}
-      else if (min_size < (unsigned HOST_WIDE_INT)epilogue_size_needed)
+      else if (!count
+	       && min_size < (unsigned HOST_WIDE_INT) epilogue_size_needed)
 	{
-	  gcc_assert (max_size >= (unsigned HOST_WIDE_INT)epilogue_size_needed);
 	  label = gen_label_rtx ();
 	  emit_cmp_and_jump_insns (count_exp,
 				   GEN_INT (epilogue_size_needed),

gcc/testsuite/ChangeLog

@@ -1,5 +1,8 @@
 2013-11-26  Jakub Jelinek  <jakub@redhat.com>
 
+	PR target/59229
+	* gcc.c-torture/execute/pr59229.c: New test.
+
 	PR rtl-optimization/59166
 	* gcc.dg/torture/pr59166.c: New test.
 

gcc/testsuite/gcc.c-torture/execute/pr59229.c

@@ -0,0 +1,29 @@
+int i;
+
+__attribute__((noinline, noclone)) void
+bar (char *p)
+{
+  if (i < 1 || i > 6)
+    __builtin_abort ();
+  if (__builtin_memcmp (p, "abcdefg", i + 1) != 0)
+    __builtin_abort ();
+  __builtin_memset (p, ' ', 7);
+}
+
+__attribute__((noinline, noclone)) void
+foo (char *p, unsigned long l)
+{
+  if (l < 1 || l > 6)
+    return;
+  char buf[7];
+  __builtin_memcpy (buf, p, l + 1);
+  bar (buf);
+}
+
+int
+main ()
+{
+  for (i = 0; i < 16; i++)
+    foo ("abcdefghijklmnop", i);
+  return 0;
+}