On Tue, Oct 24, 2017 at 01:55:58PM -0400, Jason Merrill wrote:
> On Tue, Oct 24, 2017 at 11:33 AM, Jakub Jelinek <ja...@redhat.com> wrote:
> > On Tue, Oct 24, 2017 at 11:06:51AM -0400, Jason Merrill wrote:
> >> On 09/29/2017 08:32 AM, Jakub Jelinek wrote:
> >> > + tree b = builtin_decl_explicit (DECL_FUNCTION_CODE (newdecl));
> >> > + if (b)
> >> > + duplicate_one_attribute (&DECL_ATTRIBUTES (b),
> >> > + DECL_ATTRIBUTES (newdecl),
> >> > + "omp declare simd");
> >>
> >> It occurs to me that we're likely to want to propagate other attributes to
> >> the builtin, too. In the testcase, nothrow and leaf also seem appropriate.
> >> Do we want a broader copy_attributes_to_builtin function, even if it only
> >> copies this omp attribute for now?
> >
> > So like this?
>
> I was thinking that the new function would decide which attributes we
> want to copy over, rather than have a "name" parameter.
Like this then?
2017-10-24 Jakub Jelinek <ja...@redhat.com>
PR libstdc++/81706
* attribs.c (attribute_value_equal): Use omp_declare_simd_clauses_equal
for comparison of OMP_CLAUSEs regardless of flag_openmp{,_simd}.
(duplicate_one_attribute, copy_attributes_to_builtin): New functions.
* attribs.h (duplicate_one_attribute, copy_attributes_to_builtin): New
declarations.
* c-decl.c (merge_decls): Copy "omp declare simd" attributes from
newdecl to corresponding __builtin_ if any.
* decl.c (duplicate_decls): Copy "omp declare simd" attributes from
newdecl to corresponding __builtin_ if any.
* gcc.target/i386/pr81706.c: New test.
* g++.dg/ext/pr81706.C: New test.
--- gcc/attribs.c.jj 2017-10-20 16:02:57.013523597 +0200
+++ gcc/attribs.c 2017-10-24 21:22:34.434131849 +0200
@@ -1125,9 +1125,9 @@ attribute_value_equal (const_tree attr1,
TREE_VALUE (attr2)) == 1);
}
- if ((flag_openmp || flag_openmp_simd)
- && TREE_VALUE (attr1) && TREE_VALUE (attr2)
+ if (TREE_VALUE (attr1)
&& TREE_CODE (TREE_VALUE (attr1)) == OMP_CLAUSE
+ && TREE_VALUE (attr2)
&& TREE_CODE (TREE_VALUE (attr2)) == OMP_CLAUSE)
return omp_declare_simd_clauses_equal (TREE_VALUE (attr1),
TREE_VALUE (attr2));
@@ -1322,6 +1322,44 @@ merge_decl_attributes (tree olddecl, tre
DECL_ATTRIBUTES (newdecl));
}
+/* Duplicate all attributes with name NAME in ATTR list to *ATTRS if
+ they are missing there. */
+
+void
+duplicate_one_attribute (tree *attrs, tree attr, const char *name)
+{
+ attr = lookup_attribute (name, attr);
+ if (!attr)
+ return;
+ tree a = lookup_attribute (name, *attrs);
+ while (attr)
+ {
+ tree a2;
+ for (a2 = a; a2; a2 = lookup_attribute (name, TREE_CHAIN (a2)))
+ if (attribute_value_equal (attr, a2))
+ break;
+ if (!a2)
+ {
+ a2 = copy_node (attr);
+ TREE_CHAIN (a2) = *attrs;
+ *attrs = a2;
+ }
+ attr = lookup_attribute (name, TREE_CHAIN (attr));
+ }
+}
+
+/* Duplicate all attributes from user DECL to the corresponding
+ builtin that should be propagated. */
+
+void
+copy_attributes_to_builtin (tree decl)
+{
+ tree b = builtin_decl_explicit (DECL_FUNCTION_CODE (decl));
+ if (b)
+ duplicate_one_attribute (&DECL_ATTRIBUTES (b),
+ DECL_ATTRIBUTES (decl), "omp declare simd");
+}
+
#if TARGET_DLLIMPORT_DECL_ATTRIBUTES
/* Specialization of merge_decl_attributes for various Windows targets.
--- gcc/attribs.h.jj 2017-09-29 19:43:38.879904220 +0200
+++ gcc/attribs.h 2017-10-24 21:22:48.158966401 +0200
@@ -77,6 +77,16 @@ extern tree remove_attribute (const char
extern tree merge_attributes (tree, tree);
+/* Duplicate all attributes with name NAME in ATTR list to *ATTRS if
+ they are missing there. */
+
+extern void duplicate_one_attribute (tree *, tree, const char *);
+
+/* Duplicate all attributes from user DECL to the corresponding
+ builtin that should be propagated. */
+
+extern void copy_attributes_to_builtin (tree);
+
/* Given two Windows decl attributes lists, possibly including
dllimport, return a list of their union . */
extern tree merge_dllimport_decl_attributes (tree, tree);
--- gcc/c/c-decl.c.jj 2017-10-11 22:37:48.943949030 +0200
+++ gcc/c/c-decl.c 2017-10-24 21:21:34.771851055 +0200
@@ -2569,6 +2569,8 @@ merge_decls (tree newdecl, tree olddecl,
set_builtin_decl_declared_p (fncode, true);
break;
}
+
+ copy_attributes_to_builtin (newdecl);
}
}
else
--- gcc/cp/decl.c.jj 2017-10-13 19:02:08.492046895 +0200
+++ gcc/cp/decl.c 2017-10-24 21:21:07.434180598 +0200
@@ -2470,6 +2470,8 @@ next_arg:;
break;
}
}
+
+ copy_attributes_to_builtin (newdecl);
}
if (new_defines_function)
/* If defining a function declared with other language
--- gcc/testsuite/gcc.target/i386/pr81706.c.jj 2017-10-24 17:24:17.787844456
+0200
+++ gcc/testsuite/gcc.target/i386/pr81706.c 2017-10-24 17:24:17.787844456
+0200
@@ -0,0 +1,32 @@
+/* PR libstdc++/81706 */
+/* { dg-do compile } */
+/* { dg-options "-O3 -mavx2 -mno-avx512f" } */
+/* { dg-final { scan-assembler "call\[^\n\r]_ZGVdN4v_cos" } } */
+/* { dg-final { scan-assembler "call\[^\n\r]_ZGVdN4v_sin" } } */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+extern double cos (double) __attribute__ ((nothrow, leaf, simd
("notinbranch")));
+extern double sin (double) __attribute__ ((nothrow, leaf, simd
("notinbranch")));
+#ifdef __cplusplus
+}
+#endif
+double p[1024] = { 1.0 };
+double q[1024] = { 1.0 };
+
+void
+foo (void)
+{
+ int i;
+ for (i = 0; i < 1024; i++)
+ p[i] = cos (q[i]);
+}
+
+void
+bar (void)
+{
+ int i;
+ for (i = 0; i < 1024; i++)
+ p[i] = __builtin_sin (q[i]);
+}
--- gcc/testsuite/g++.dg/ext/pr81706.C.jj 2017-10-24 17:24:17.788844444
+0200
+++ gcc/testsuite/g++.dg/ext/pr81706.C 2017-10-24 17:24:17.787844456 +0200
@@ -0,0 +1,32 @@
+// PR libstdc++/81706
+// { dg-do compile { target i?86-*-* x86_64-*-* } }
+// { dg-options "-O3 -mavx2 -mno-avx512f" }
+// { dg-final { scan-assembler "call\[^\n\r]_ZGVdN4v_cos" } }
+// { dg-final { scan-assembler "call\[^\n\r]_ZGVdN4v_sin" } }
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+extern double cos (double) __attribute__ ((nothrow, leaf, simd
("notinbranch")));
+extern double sin (double) __attribute__ ((nothrow, leaf, simd
("notinbranch")));
+#ifdef __cplusplus
+}
+#endif
+double p[1024] = { 1.0 };
+double q[1024] = { 1.0 };
+
+void
+foo (void)
+{
+ int i;
+ for (i = 0; i < 1024; i++)
+ p[i] = cos (q[i]);
+}
+
+void
+bar (void)
+{
+ int i;
+ for (i = 0; i < 1024; i++)
+ p[i] = __builtin_sin (q[i]);
+}
Jakub
