asan.c (build_check_stmt): Alignment arg was added.

gcc/ChangeLog:

2014-09-19  Marat Zakirov  <m.zakirov@samsung.com>

	* asan.c (build_check_stmt): Alignment arg was added.
	(asan_expand_check_ifn): Optimization for alignment >= 8.

gcc/testsuite/ChangeLog:

2014-09-19  Marat Zakirov  <m.zakirov@samsung.com>

	* c-c++-common/asan/red-align-1.c: New test.
	* c-c++-common/asan/red-align-2.c: New test.

From-SVN: r215380

gcc/ChangeLog

+2014-09-19  Marat Zakirov  <m.zakirov@samsung.com>
+
+	* asan.c (build_check_stmt): Alignment arg was added.
+	(asan_expand_check_ifn): Optimization for alignment >= 8.
+
 2014-09-19  Olivier Hainque  <hainque@adacore.com>
 
 	* config/i386/vxworksae.h: Remove obsolete definitions.

gcc/asan.c

@@ -1667,9 +1667,11 @@ build_check_stmt (location_t loc, tree base, tree len,
   if (end_instrumented)
     flags |= ASAN_CHECK_END_INSTRUMENTED;
 
-  g = gimple_build_call_internal (IFN_ASAN_CHECK, 3,
+  g = gimple_build_call_internal (IFN_ASAN_CHECK, 4,
 				  build_int_cst (integer_type_node, flags),
-				  base, len);
+				  base, len,
+				  build_int_cst (integer_type_node,
+						 align / BITS_PER_UNIT));
   gimple_set_location (g, loc);
   if (before_p)
     gsi_insert_before (&gsi, g, GSI_SAME_STMT);
@@ -2466,6 +2468,7 @@ asan_expand_check_ifn (gimple_stmt_iterator *iter, bool use_calls)
 
   tree base = gimple_call_arg (g, 1);
   tree len = gimple_call_arg (g, 2);
+  HOST_WIDE_INT align = tree_to_shwi (gimple_call_arg (g, 3));
 
   HOST_WIDE_INT size_in_bytes
     = is_scalar_access && tree_fits_shwi_p (len) ? tree_to_shwi (len) : -1;
@@ -2576,7 +2579,10 @@ asan_expand_check_ifn (gimple_stmt_iterator *iter, bool use_calls)
 	  gimple shadow_test = build_assign (NE_EXPR, shadow, 0);
 	  gimple_seq seq = NULL;
 	  gimple_seq_add_stmt (&seq, shadow_test);
-	  gimple_seq_add_stmt (&seq, build_assign (BIT_AND_EXPR, base_addr, 7));
+	  /* Aligned (>= 8 bytes) access do not need & 7.  */
+	  if (align < 8)
+	    gimple_seq_add_stmt (&seq, build_assign (BIT_AND_EXPR,
+						     base_addr, 7));
 	  gimple_seq_add_stmt (&seq, build_type_cast (shadow_type,
 						      gimple_seq_last (seq)));
 	  if (real_size_in_bytes > 1)

gcc/internal-fn.def

@@ -55,4 +55,4 @@ DEF_INTERNAL_FN (UBSAN_CHECK_SUB, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 DEF_INTERNAL_FN (UBSAN_CHECK_MUL, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 DEF_INTERNAL_FN (ABNORMAL_DISPATCHER, ECF_NORETURN, NULL)
 DEF_INTERNAL_FN (BUILTIN_EXPECT, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
-DEF_INTERNAL_FN (ASAN_CHECK, ECF_TM_PURE | ECF_LEAF | ECF_NOTHROW, ".W..")
+DEF_INTERNAL_FN (ASAN_CHECK, ECF_TM_PURE | ECF_LEAF | ECF_NOTHROW, ".W...")

gcc/testsuite/ChangeLog

+2014-09-19  Marat Zakirov  <m.zakirov@samsung.com>
+
+	* c-c++-common/asan/red-align-1.c: New test.
+	* c-c++-common/asan/red-align-2.c: New test.
+
 2014-09-18  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* gcc.dg/pr61053.c: Updated for x32.

gcc/testsuite/c-c++-common/asan/red-align-1.c

+/* This tests aligment propagation to structure elem and
+   abcense of redundant & 7.  */
+
+/* { dg-options "-fdump-tree-sanopt" } */
+/* { dg-do compile } */
+/* { dg-skip-if "" { *-*-* } { "-flto" } { "" } } */
+
+struct st {
+  int a;
+  int b;
+  int c;
+} __attribute__((aligned(16)));
+
+int foo (struct st * s_p)
+{
+  return s_p->a;
+}
+
+/* { dg-final { scan-tree-dump-times "& 7" 0 "sanopt" } } */
+/* { dg-final { cleanup-tree-dump "sanopt" } } */

gcc/testsuite/c-c++-common/asan/red-align-2.c

+/* This tests aligment propagation to structure elem and
+   abcense of redundant & 7.  */
+
+/* { dg-options "-fdump-tree-sanopt" } */
+/* { dg-do compile } */
+/* { dg-skip-if "" { *-*-* } { "-flto" } { "" } } */
+
+struct st {
+  int a;
+  int b;
+  int c;
+} __attribute__((aligned(16)));
+
+int foo (struct st * s_p)
+{
+  return s_p->b;
+}
+
+/* { dg-final { scan-tree-dump-times "& 7" 1 "sanopt" } } */
+/* { dg-final { cleanup-tree-dump "sanopt" } } */