re PR rtl-optimization/80358 (ICE (cc1 killed) building glib with -O3 on powerpc64le-linux-gnu)

2017-04-08  Aaron Sawdey  <acsawdey@linux.vnet.ibm.com>

	PR target/80358
	* config/rs6000/rs6000.c (expand_block_compare): Fix boundary check.

From-SVN: r246784

gcc/ChangeLog

+2017-04-08  Aaron Sawdey  <acsawdey@linux.vnet.ibm.com>
+
+	PR target/80358
+	* config/rs6000/rs6000.c (expand_block_compare): Fix boundary check.
+
 2017-04-07  Pat Haugen  <pthaugen@us.ibm.com>
 
 	* rs6000/rs6000.c (vec_load_pendulum): Rename...

gcc/config/rs6000/rs6000.c

@@ -19672,8 +19672,9 @@ expand_block_compare (rtx operands[])
   unsigned int load_mode_size = GET_MODE_SIZE (load_mode);
 
   /* We don't want to generate too much code.  */
-  if (ROUND_UP (bytes, load_mode_size) / load_mode_size
-      > (unsigned HOST_WIDE_INT) rs6000_block_compare_inline_limit)
+  unsigned HOST_WIDE_INT max_bytes =
+    load_mode_size * (unsigned HOST_WIDE_INT) rs6000_block_compare_inline_limit;
+  if (!IN_RANGE (bytes, 1, max_bytes))
     return false;
 
   bool generate_6432_conversion = false;