Re: [PATCH] __builtin_assume_aligned

[Richard Guenther <richard dot guenther at gmail dot com>]

On Mon, Jun 27, 2011 at 6:54 PM, Jakub Jelinek <jakub@redhat.com> wrote:
> On Mon, Jun 27, 2011 at 12:17:40PM +0200, Richard Guenther wrote:
>> Ok if you remove the builtins.c folding and instead verify arguments
>> from check_builtin_function_arguments.
>
> Thanks, here is what I've committed after bootstrapping/regtesting
> again on x86_64-linux and i686-linux.

Thanks Jakub.  Probably worth an entry in changes.html.

Richard.

> 2011-06-27 ?Jakub Jelinek ?<jakub@redhat.com>
>
> ? ? ? ?* builtin-types.def (BT_FN_PTR_CONST_PTR_SIZE_VAR): New.
> ? ? ? ?* builtins.def (BUILT_IN_ASSUME_ALIGNED): New builtin.
> ? ? ? ?* tree-ssa-structalias.c (find_func_aliases_for_builtin_call,
> ? ? ? ?find_func_clobbers): Handle BUILT_IN_ASSUME_ALIGNED.
> ? ? ? ?* tree-ssa-ccp.c (bit_value_assume_aligned): New function.
> ? ? ? ?(evaluate_stmt, execute_fold_all_builtins): Handle
> ? ? ? ?BUILT_IN_ASSUME_ALIGNED.
> ? ? ? ?* tree-ssa-dce.c (propagate_necessity): Likewise.
> ? ? ? ?* tree-ssa-alias.c (ref_maybe_used_by_call_p_1,
> ? ? ? ?call_may_clobber_ref_p_1): Likewise.
> ? ? ? ?* builtins.c (is_simple_builtin, expand_builtin): Likewise.
> ? ? ? ?(expand_builtin_assume_aligned): New function.
> ? ? ? ?* doc/extend.texi (__builtin_assume_aligned): Document.
>
> ? ? ? ?* c-common.c (check_builtin_function_arguments): Handle
> ? ? ? ?BUILT_IN_ASSUME_ALIGNED.
>
> ? ? ? ?* gcc.dg/builtin-assume-aligned-1.c: New test.
> ? ? ? ?* gcc.dg/builtin-assume-aligned-2.c: New test.
> ? ? ? ?* gcc.target/i386/builtin-assume-aligned-1.c: New test.
>
> --- gcc/builtin-types.def.jj ? ?2011-06-26 09:55:16.000000000 +0200
> +++ gcc/builtin-types.def ? ? ? 2011-06-27 15:08:12.000000000 +0200
> @@ -454,6 +454,8 @@ DEF_FUNCTION_TYPE_VAR_2 (BT_FN_INT_CONST
> ? ? ? ? ? ? ? ? ? ? ? ? BT_INT, BT_CONST_STRING, BT_CONST_STRING)
> ?DEF_FUNCTION_TYPE_VAR_2 (BT_FN_INT_INT_CONST_STRING_VAR,
> ? ? ? ? ? ? ? ? ? ? ? ? BT_INT, BT_INT, BT_CONST_STRING)
> +DEF_FUNCTION_TYPE_VAR_2 (BT_FN_PTR_CONST_PTR_SIZE_VAR, BT_PTR,
> + ? ? ? ? ? ? ? ? ? ? ? ?BT_CONST_PTR, BT_SIZE)
>
> ?DEF_FUNCTION_TYPE_VAR_3 (BT_FN_INT_STRING_SIZE_CONST_STRING_VAR,
> ? ? ? ? ? ? ? ? ? ? ? ? BT_INT, BT_STRING, BT_SIZE, BT_CONST_STRING)
> --- gcc/builtins.def.jj 2011-06-26 09:55:16.000000000 +0200
> +++ gcc/builtins.def ? ?2011-06-27 15:08:12.000000000 +0200
> @@ -1,7 +1,7 @@
> ?/* This file contains the definitions and documentation for the
> ? ?builtins used in the GNU compiler.
> ? ?Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
> - ? 2010 Free Software Foundation, Inc.
> + ? 2010, 2011 Free Software Foundation, Inc.
>
> ?This file is part of GCC.
>
> @@ -638,6 +638,7 @@ DEF_EXT_LIB_BUILTIN ? ? ? ?(BUILT_IN_EXE
> ?DEF_EXT_LIB_BUILTIN ? ? ? ?(BUILT_IN_EXECVE, "execve", BT_FN_INT_CONST_STRING_PTR_CONST_STRING_PTR_CONST_STRING, ATTR_NOTHROW_LIST)
> ?DEF_LIB_BUILTIN ? ? ? ?(BUILT_IN_EXIT, "exit", BT_FN_VOID_INT, ATTR_NORETURN_NOTHROW_LIST)
> ?DEF_GCC_BUILTIN ? ? ? ?(BUILT_IN_EXPECT, "expect", BT_FN_LONG_LONG_LONG, ATTR_CONST_NOTHROW_LEAF_LIST)
> +DEF_GCC_BUILTIN ? ? ? ?(BUILT_IN_ASSUME_ALIGNED, "assume_aligned", BT_FN_PTR_CONST_PTR_SIZE_VAR, ATTR_CONST_NOTHROW_LEAF_LIST)
> ?DEF_GCC_BUILTIN ? ? ? ?(BUILT_IN_EXTEND_POINTER, "extend_pointer", BT_FN_UNWINDWORD_PTR, ATTR_CONST_NOTHROW_LEAF_LIST)
> ?DEF_GCC_BUILTIN ? ? ? ?(BUILT_IN_EXTRACT_RETURN_ADDR, "extract_return_addr", BT_FN_PTR_PTR, ATTR_LEAF_LIST)
> ?DEF_EXT_LIB_BUILTIN ? ?(BUILT_IN_FFS, "ffs", BT_FN_INT_INT, ATTR_CONST_NOTHROW_LEAF_LIST)
> --- gcc/tree-ssa-structalias.c.jj ? ? ? 2011-06-26 09:55:16.000000000 +0200
> +++ gcc/tree-ssa-structalias.c ?2011-06-27 15:08:12.000000000 +0200
> @@ -4002,6 +4002,7 @@ find_func_aliases_for_builtin_call (gimp
> ? ? ? case BUILT_IN_STPCPY_CHK:
> ? ? ? case BUILT_IN_STRCAT_CHK:
> ? ? ? case BUILT_IN_STRNCAT_CHK:
> + ? ? ?case BUILT_IN_ASSUME_ALIGNED:
> ? ? ? ?{
> ? ? ? ? ?tree res = gimple_call_lhs (t);
> ? ? ? ? ?tree dest = gimple_call_arg (t, (DECL_FUNCTION_CODE (fndecl)
> @@ -4726,6 +4727,7 @@ find_func_clobbers (gimple origt)
> ? ? ? ? ? ? ?return;
> ? ? ? ? ? ?}
> ? ? ? ? ?/* The following functions neither read nor clobber memory. ?*/
> + ? ? ? ? case BUILT_IN_ASSUME_ALIGNED:
> ? ? ? ? ?case BUILT_IN_FREE:
> ? ? ? ? ? ?return;
> ? ? ? ? ?/* Trampolines are of no interest to us. ?*/
> --- gcc/tree-ssa-ccp.c.jj ? ? ? 2011-06-26 09:55:16.000000000 +0200
> +++ gcc/tree-ssa-ccp.c ?2011-06-27 15:08:12.000000000 +0200
> @@ -1476,6 +1476,64 @@ bit_value_binop (enum tree_code code, tr
> ? return val;
> ?}
>
> +/* Return the propagation value when applying __builtin_assume_aligned to
> + ? its arguments. ?*/
> +
> +static prop_value_t
> +bit_value_assume_aligned (gimple stmt)
> +{
> + ?tree ptr = gimple_call_arg (stmt, 0), align, misalign = NULL_TREE;
> + ?tree type = TREE_TYPE (ptr);
> + ?unsigned HOST_WIDE_INT aligni, misaligni = 0;
> + ?prop_value_t ptrval = get_value_for_expr (ptr, true);
> + ?prop_value_t alignval;
> + ?double_int value, mask;
> + ?prop_value_t val;
> + ?if (ptrval.lattice_val == UNDEFINED)
> + ? ?return ptrval;
> + ?gcc_assert ((ptrval.lattice_val == CONSTANT
> + ? ? ? ? ? ? ?&& TREE_CODE (ptrval.value) == INTEGER_CST)
> + ? ? ? ? ? ? || double_int_minus_one_p (ptrval.mask));
> + ?align = gimple_call_arg (stmt, 1);
> + ?if (!host_integerp (align, 1))
> + ? ?return ptrval;
> + ?aligni = tree_low_cst (align, 1);
> + ?if (aligni <= 1
> + ? ? ?|| (aligni & (aligni - 1)) != 0)
> + ? ?return ptrval;
> + ?if (gimple_call_num_args (stmt) > 2)
> + ? ?{
> + ? ? ?misalign = gimple_call_arg (stmt, 2);
> + ? ? ?if (!host_integerp (misalign, 1))
> + ? ? ? return ptrval;
> + ? ? ?misaligni = tree_low_cst (misalign, 1);
> + ? ? ?if (misaligni >= aligni)
> + ? ? ? return ptrval;
> + ? ?}
> + ?align = build_int_cst_type (type, -aligni);
> + ?alignval = get_value_for_expr (align, true);
> + ?bit_value_binop_1 (BIT_AND_EXPR, type, &value, &mask,
> + ? ? ? ? ? ? ? ? ? ?type, value_to_double_int (ptrval), ptrval.mask,
> + ? ? ? ? ? ? ? ? ? ?type, value_to_double_int (alignval), alignval.mask);
> + ?if (!double_int_minus_one_p (mask))
> + ? ?{
> + ? ? ?val.lattice_val = CONSTANT;
> + ? ? ?val.mask = mask;
> + ? ? ?gcc_assert ((mask.low & (aligni - 1)) == 0);
> + ? ? ?gcc_assert ((value.low & (aligni - 1)) == 0);
> + ? ? ?value.low |= misaligni;
> + ? ? ?/* ??? ?Delay building trees here. ?*/
> + ? ? ?val.value = double_int_to_tree (type, value);
> + ? ?}
> + ?else
> + ? ?{
> + ? ? ?val.lattice_val = VARYING;
> + ? ? ?val.value = NULL_TREE;
> + ? ? ?val.mask = double_int_minus_one;
> + ? ?}
> + ?return val;
> +}
> +
> ?/* Evaluate statement STMT.
> ? ?Valid only for assignments, calls, conditionals, and switches. */
>
> @@ -1647,6 +1705,10 @@ evaluate_stmt (gimple stmt)
> ? ? ? ? ? ? ?val = get_value_for_expr (gimple_call_arg (stmt, 0), true);
> ? ? ? ? ? ? ?break;
>
> + ? ? ? ? ? case BUILT_IN_ASSUME_ALIGNED:
> + ? ? ? ? ? ? val = bit_value_assume_aligned (stmt);
> + ? ? ? ? ? ? break;
> +
> ? ? ? ? ? ?default:;
> ? ? ? ? ? ?}
> ? ? ? ?}
> @@ -2186,6 +2248,11 @@ execute_fold_all_builtins (void)
> ? ? ? ? ? ? ? ? result = integer_zero_node;
> ? ? ? ? ? ? ? ?break;
>
> + ? ? ? ? ? ? case BUILT_IN_ASSUME_ALIGNED:
> + ? ? ? ? ? ? ? /* Remove __builtin_assume_aligned. ?*/
> + ? ? ? ? ? ? ? result = gimple_call_arg (stmt, 0);
> + ? ? ? ? ? ? ? break;
> +
> ? ? ? ? ? ? ?case BUILT_IN_STACK_RESTORE:
> ? ? ? ? ? ? ? ?result = optimize_stack_restore (i);
> ? ? ? ? ? ? ? ?if (result)
> --- gcc/tree-ssa-dce.c.jj ? ? ? 2011-06-26 09:55:16.000000000 +0200
> +++ gcc/tree-ssa-dce.c ?2011-06-27 15:08:12.000000000 +0200
> @@ -837,7 +837,8 @@ propagate_necessity (struct edge_list *e
> ? ? ? ? ? ? ? ? ? ? ?|| DECL_FUNCTION_CODE (callee) == BUILT_IN_FREE
> ? ? ? ? ? ? ? ? ? ? ?|| DECL_FUNCTION_CODE (callee) == BUILT_IN_ALLOCA
> ? ? ? ? ? ? ? ? ? ? ?|| DECL_FUNCTION_CODE (callee) == BUILT_IN_STACK_SAVE
> - ? ? ? ? ? ? ? ? ? ? || DECL_FUNCTION_CODE (callee) == BUILT_IN_STACK_RESTORE))
> + ? ? ? ? ? ? ? ? ? ? || DECL_FUNCTION_CODE (callee) == BUILT_IN_STACK_RESTORE
> + ? ? ? ? ? ? ? ? ? ? || DECL_FUNCTION_CODE (callee) == BUILT_IN_ASSUME_ALIGNED))
> ? ? ? ? ? ? ? ?continue;
>
> ? ? ? ? ? ? ?/* Calls implicitly load from memory, their arguments
> --- gcc/tree-ssa-alias.c.jj ? ? 2011-06-26 09:55:16.000000000 +0200
> +++ gcc/tree-ssa-alias.c ? ? ? ?2011-06-27 15:08:12.000000000 +0200
> @@ -1253,6 +1253,7 @@ ref_maybe_used_by_call_p_1 (gimple call,
> ? ? ? ?case BUILT_IN_SINCOS:
> ? ? ? ?case BUILT_IN_SINCOSF:
> ? ? ? ?case BUILT_IN_SINCOSL:
> + ? ? ? case BUILT_IN_ASSUME_ALIGNED:
> ? ? ? ? ?return false;
> ? ? ? ?/* __sync_* builtins and some OpenMP builtins act as threading
> ? ? ? ? ? barriers. ?*/
> @@ -1511,6 +1512,7 @@ call_may_clobber_ref_p_1 (gimple call, a
> ? ? ? ? ?return false;
> ? ? ? ?case BUILT_IN_STACK_SAVE:
> ? ? ? ?case BUILT_IN_ALLOCA:
> + ? ? ? case BUILT_IN_ASSUME_ALIGNED:
> ? ? ? ? ?return false;
> ? ? ? ?/* Freeing memory kills the pointed-to memory. ?More importantly
> ? ? ? ? ? the call has to serve as a barrier for moving loads and stores
> --- gcc/builtins.c.jj ? 2011-06-26 09:55:16.000000000 +0200
> +++ gcc/builtins.c ? ? ?2011-06-27 15:13:34.000000000 +0200
> @@ -4604,6 +4604,23 @@ expand_builtin_expect (tree exp, rtx tar
> ? return target;
> ?}
>
> +/* Expand a call to __builtin_assume_aligned. ?We just return our first
> + ? argument as the builtin_assume_aligned semantic should've been already
> + ? executed by CCP. ?*/
> +
> +static rtx
> +expand_builtin_assume_aligned (tree exp, rtx target)
> +{
> + ?if (call_expr_nargs (exp) < 2)
> + ? ?return const0_rtx;
> + ?target = expand_expr (CALL_EXPR_ARG (exp, 0), target, VOIDmode,
> + ? ? ? ? ? ? ? ? ? ? ? EXPAND_NORMAL);
> + ?gcc_assert (!TREE_SIDE_EFFECTS (CALL_EXPR_ARG (exp, 1))
> + ? ? ? ? ? ? && (call_expr_nargs (exp) < 3
> + ? ? ? ? ? ? ? ? || !TREE_SIDE_EFFECTS (CALL_EXPR_ARG (exp, 2))));
> + ?return target;
> +}
> +
> ?void
> ?expand_builtin_trap (void)
> ?{
> @@ -5823,6 +5840,8 @@ expand_builtin (tree exp, rtx target, rt
> ? ? ? return expand_builtin_va_copy (exp);
> ? ? case BUILT_IN_EXPECT:
> ? ? ? return expand_builtin_expect (exp, target);
> + ? ?case BUILT_IN_ASSUME_ALIGNED:
> + ? ? ?return expand_builtin_assume_aligned (exp, target);
> ? ? case BUILT_IN_PREFETCH:
> ? ? ? expand_builtin_prefetch (exp);
> ? ? ? return const0_rtx;
> @@ -13461,6 +13480,7 @@ is_simple_builtin (tree decl)
> ? ? ? case BUILT_IN_OBJECT_SIZE:
> ? ? ? case BUILT_IN_UNREACHABLE:
> ? ? ? ?/* Simple register moves or loads from stack. ?*/
> + ? ? ?case BUILT_IN_ASSUME_ALIGNED:
> ? ? ? case BUILT_IN_RETURN_ADDRESS:
> ? ? ? case BUILT_IN_EXTRACT_RETURN_ADDR:
> ? ? ? case BUILT_IN_FROB_RETURN_ADDR:
> --- gcc/doc/extend.texi.jj ? ? ?2011-06-26 09:55:16.000000000 +0200
> +++ gcc/doc/extend.texi 2011-06-27 15:08:12.000000000 +0200
> @@ -7646,6 +7646,28 @@ int g (int c)
>
> ?@end deftypefn
>
> +@deftypefn {Built-in Function} void *__builtin_assume_aligned (const void *@var{exp}, size_t @var{align}, ...)
> +This function returns its first argument, and allows the compiler
> +to assume that the returned pointer is at least @var{align} bytes
> +aligned. ?This built-in can have either two or three arguments,
> +if it has three, the third argument should have integer type, and
> +if it is non-zero means misalignment offset. ?For example:
> +
> +@smallexample
> +void *x = __builtin_assume_aligned (arg, 16);
> +@end smallexample
> +
> +means that the compiler can assume x, set to arg, is at least
> +16 byte aligned, while:
> +
> +@smallexample
> +void *x = __builtin_assume_aligned (arg, 32, 8);
> +@end smallexample
> +
> +means that the compiler can assume for x, set to arg, that
> +(char *) x - 8 is 32 byte aligned.
> +@end deftypefn
> +
> ?@deftypefn {Built-in Function} void __builtin___clear_cache (char *@var{begin}, char *@var{end})
> ?This function is used to flush the processor's instruction cache for
> ?the region of memory between @var{begin} inclusive and @var{end}
> --- gcc/c-family/c-common.c.jj ?2011-06-22 10:16:49.000000000 +0200
> +++ gcc/c-family/c-common.c ? ? 2011-06-27 15:18:39.000000000 +0200
> @@ -8166,6 +8166,18 @@ check_builtin_function_arguments (tree f
> ? ? ? ?}
> ? ? ? return false;
>
> + ? ?case BUILT_IN_ASSUME_ALIGNED:
> + ? ? ?if (builtin_function_validate_nargs (fndecl, nargs, 2 + (nargs > 2)))
> + ? ? ? {
> + ? ? ? ? if (nargs >= 3 && TREE_CODE (TREE_TYPE (args[2])) != INTEGER_TYPE)
> + ? ? ? ? ? {
> + ? ? ? ? ? ? error ("non-integer argument 3 in call to function %qE", fndecl);
> + ? ? ? ? ? ? return false;
> + ? ? ? ? ? }
> + ? ? ? ? return true;
> + ? ? ? }
> + ? ? ?return false;
> +
> ? ? default:
> ? ? ? return true;
> ? ? }
> --- gcc/testsuite/gcc.dg/builtin-assume-aligned-1.c.jj ?2011-06-27 15:08:12.000000000 +0200
> +++ gcc/testsuite/gcc.dg/builtin-assume-aligned-1.c ? ? 2011-06-27 15:08:12.000000000 +0200
> @@ -0,0 +1,41 @@
> +/* { dg-do compile } */
> +/* { dg-options "-O3 -fdump-tree-optimized" } */
> +
> +void
> +test1 (double *out1, double *out2, double *out3, double *in1,
> + ? ? ? double *in2, int len)
> +{
> + ?int i;
> + ?double *__restrict o1 = __builtin_assume_aligned (out1, 16);
> + ?double *__restrict o2 = __builtin_assume_aligned (out2, 16);
> + ?double *__restrict o3 = __builtin_assume_aligned (out3, 16);
> + ?double *__restrict i1 = __builtin_assume_aligned (in1, 16);
> + ?double *__restrict i2 = __builtin_assume_aligned (in2, 16);
> + ?for (i = 0; i < len; ++i)
> + ? ?{
> + ? ? ?o1[i] = i1[i] * i2[i];
> + ? ? ?o2[i] = i1[i] + i2[i];
> + ? ? ?o3[i] = i1[i] - i2[i];
> + ? ?}
> +}
> +
> +void
> +test2 (double *out1, double *out2, double *out3, double *in1,
> + ? ? ? double *in2, int len)
> +{
> + ?int i, align = 32, misalign = 16;
> + ?out1 = __builtin_assume_aligned (out1, align, misalign);
> + ?out2 = __builtin_assume_aligned (out2, align, 16);
> + ?out3 = __builtin_assume_aligned (out3, 32, misalign);
> + ?in1 = __builtin_assume_aligned (in1, 32, 16);
> + ?in2 = __builtin_assume_aligned (in2, 32, 0);
> + ?for (i = 0; i < len; ++i)
> + ? ?{
> + ? ? ?out1[i] = in1[i] * in2[i];
> + ? ? ?out2[i] = in1[i] + in2[i];
> + ? ? ?out3[i] = in1[i] - in2[i];
> + ? ?}
> +}
> +
> +/* { dg-final { scan-tree-dump-not "__builtin_assume_aligned" "optimized" } } */
> +/* { dg-final { cleanup-tree-dump "optimized" } } */
> --- gcc/testsuite/gcc.dg/builtin-assume-aligned-2.c.jj ?2011-06-27 15:08:12.000000000 +0200
> +++ gcc/testsuite/gcc.dg/builtin-assume-aligned-2.c ? ? 2011-06-27 15:26:19.000000000 +0200
> @@ -0,0 +1,18 @@
> +/* { dg-do compile } */
> +
> +double *bar (void);
> +
> +void
> +foo (double *ptr, int i)
> +{
> + ?double *a = __builtin_assume_aligned (ptr, 16, 8, 7); ? ? ? ?/* { dg-error "too many arguments to function" } */
> + ?double *b = __builtin_assume_aligned (bar (), 16);
> + ?double *c = __builtin_assume_aligned (bar (), 16, 8);
> + ?double *d = __builtin_assume_aligned (ptr, i, ptr); ?/* { dg-error "non-integer argument 3 in call to function" } */
> + ?double *e = __builtin_assume_aligned (ptr, i, *ptr); /* { dg-error "non-integer argument 3 in call to function" } */
> + ?*a = 0.0;
> + ?*b = 0.0;
> + ?*c = 0.0;
> + ?*d = 0.0;
> + ?*e = 0.0;
> +}
> --- gcc/testsuite/gcc.target/i386/builtin-assume-aligned-1.c.jj 2011-06-27 15:08:12.000000000 +0200
> +++ gcc/testsuite/gcc.target/i386/builtin-assume-aligned-1.c ? ?2011-06-27 15:08:12.000000000 +0200
> @@ -0,0 +1,41 @@
> +/* { dg-do compile } */
> +/* { dg-options "-O3 -msse2 -mno-avx" } */
> +
> +void
> +test1 (double *out1, double *out2, double *out3, double *in1,
> + ? ? ? double *in2, int len)
> +{
> + ?int i;
> + ?double *__restrict o1 = __builtin_assume_aligned (out1, 16);
> + ?double *__restrict o2 = __builtin_assume_aligned (out2, 16);
> + ?double *__restrict o3 = __builtin_assume_aligned (out3, 16);
> + ?double *__restrict i1 = __builtin_assume_aligned (in1, 16);
> + ?double *__restrict i2 = __builtin_assume_aligned (in2, 16);
> + ?for (i = 0; i < len; ++i)
> + ? ?{
> + ? ? ?o1[i] = i1[i] * i2[i];
> + ? ? ?o2[i] = i1[i] + i2[i];
> + ? ? ?o3[i] = i1[i] - i2[i];
> + ? ?}
> +}
> +
> +void
> +test2 (double *out1, double *out2, double *out3, double *in1,
> + ? ? ? double *in2, int len)
> +{
> + ?int i, align = 32, misalign = 16;
> + ?out1 = __builtin_assume_aligned (out1, align, misalign);
> + ?out2 = __builtin_assume_aligned (out2, align, 16);
> + ?out3 = __builtin_assume_aligned (out3, 32, misalign);
> + ?in1 = __builtin_assume_aligned (in1, 32, 16);
> + ?in2 = __builtin_assume_aligned (in2, 32, 0);
> + ?for (i = 0; i < len; ++i)
> + ? ?{
> + ? ? ?out1[i] = in1[i] * in2[i];
> + ? ? ?out2[i] = in1[i] + in2[i];
> + ? ? ?out3[i] = in1[i] - in2[i];
> + ? ?}
> +}
> +
> +/* { dg-final { scan-assembler-not "movhpd" } } */
> +/* { dg-final { scan-assembler-not "movlpd" } } */
>
>
> ? ? ? ?Jakub
>