diff mbox series

[v17,07/26] c++: Implement __builtin_is_unbounded_array trait

Message ID 20240502184529.97337-8-kmatsui@gcc.gnu.org
State New
Headers show
Series Optimize more type traits | expand

Commit Message

Ken Matsui May 2, 2024, 6:42 p.m. UTC 
This patch implements built-in trait for std::is_unbounded_array.

gcc/cp/ChangeLog:

	* cp-trait.def: Define __builtin_is_unbounded_array.
	* constraint.cc (diagnose_trait_expr): Handle
	CPTK_IS_UNBOUNDED_ARRAY.
	* semantics.cc (trait_expr_value): Likewise.
	(finish_trait_expr): Likewise.

gcc/testsuite/ChangeLog:

	* g++.dg/ext/has-builtin-1.C: Test existence of
	__builtin_is_unbounded_array.
	* g++.dg/ext/is_unbounded_array.C: New test.

Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
---
 gcc/cp/constraint.cc                          |  3 ++
 gcc/cp/cp-trait.def                           |  1 +
 gcc/cp/semantics.cc                           |  4 ++
 gcc/testsuite/g++.dg/ext/has-builtin-1.C      |  3 ++
 gcc/testsuite/g++.dg/ext/is_unbounded_array.C | 37 +++++++++++++++++++
 5 files changed, 48 insertions(+)
 create mode 100644 gcc/testsuite/g++.dg/ext/is_unbounded_array.C
diff mbox series

Patch

diff --git a/gcc/cp/constraint.cc b/gcc/cp/constraint.cc
index 5a8aaa70fa6..d4cc8850486 100644
--- a/gcc/cp/constraint.cc
+++ b/gcc/cp/constraint.cc
@@ -3862,6 +3862,9 @@  diagnose_trait_expr (tree expr, tree args)
     case CPTK_IS_TRIVIALLY_COPYABLE:
       inform (loc, "  %qT is not trivially copyable", t1);
       break;
+    case CPTK_IS_UNBOUNDED_ARRAY:
+      inform (loc, "  %qT is not an unbounded array", t1);
+      break;
     case CPTK_IS_UNION:
       inform (loc, "  %qT is not a union", t1);
       break;
diff --git a/gcc/cp/cp-trait.def b/gcc/cp/cp-trait.def
index 18e2d0f3480..00bba91f461 100644
--- a/gcc/cp/cp-trait.def
+++ b/gcc/cp/cp-trait.def
@@ -92,6 +92,7 @@  DEFTRAIT_EXPR (IS_TRIVIAL, "__is_trivial", 1)
 DEFTRAIT_EXPR (IS_TRIVIALLY_ASSIGNABLE, "__is_trivially_assignable", 2)
 DEFTRAIT_EXPR (IS_TRIVIALLY_CONSTRUCTIBLE, "__is_trivially_constructible", -1)
 DEFTRAIT_EXPR (IS_TRIVIALLY_COPYABLE, "__is_trivially_copyable", 1)
+DEFTRAIT_EXPR (IS_UNBOUNDED_ARRAY, "__builtin_is_unbounded_array", 1)
 DEFTRAIT_EXPR (IS_UNION, "__is_union", 1)
 DEFTRAIT_EXPR (IS_VOLATILE, "__is_volatile", 1)
 DEFTRAIT_EXPR (REF_CONSTRUCTS_FROM_TEMPORARY, "__reference_constructs_from_temporary", 2)
diff --git a/gcc/cp/semantics.cc b/gcc/cp/semantics.cc
index 86372ea0aba..138b180d9fb 100644
--- a/gcc/cp/semantics.cc
+++ b/gcc/cp/semantics.cc
@@ -12616,6 +12616,9 @@  trait_expr_value (cp_trait_kind kind, tree type1, tree type2)
     case CPTK_IS_TRIVIALLY_COPYABLE:
       return trivially_copyable_p (type1);
 
+    case CPTK_IS_UNBOUNDED_ARRAY:
+      return array_of_unknown_bound_p (type1);
+
     case CPTK_IS_UNION:
       return type_code1 == UNION_TYPE;
 
@@ -12832,6 +12835,7 @@  finish_trait_expr (location_t loc, cp_trait_kind kind, tree type1, tree type2)
     case CPTK_IS_REFERENCE:
     case CPTK_IS_SAME:
     case CPTK_IS_SCOPED_ENUM:
+    case CPTK_IS_UNBOUNDED_ARRAY:
     case CPTK_IS_UNION:
     case CPTK_IS_VOLATILE:
       break;
diff --git a/gcc/testsuite/g++.dg/ext/has-builtin-1.C b/gcc/testsuite/g++.dg/ext/has-builtin-1.C
index 4cbe6fe8cea..068d8187707 100644
--- a/gcc/testsuite/g++.dg/ext/has-builtin-1.C
+++ b/gcc/testsuite/g++.dg/ext/has-builtin-1.C
@@ -17,6 +17,9 @@ 
 #if !__has_builtin (__builtin_is_pointer_interconvertible_with_class)
 # error "__has_builtin (__builtin_is_pointer_interconvertible_with_class) failed"
 #endif
+#if !__has_builtin (__builtin_is_unbounded_array)
+# error "__has_builtin (__builtin_is_unbounded_array) failed"
+#endif
 #if !__has_builtin (__builtin_launder)
 # error "__has_builtin (__builtin_launder) failed"
 #endif
diff --git a/gcc/testsuite/g++.dg/ext/is_unbounded_array.C b/gcc/testsuite/g++.dg/ext/is_unbounded_array.C
new file mode 100644
index 00000000000..ac593b99aa7
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/is_unbounded_array.C
@@ -0,0 +1,37 @@ 
+// { dg-do compile { target c++11 } }
+
+#define SA(X) static_assert((X),#X)
+
+#define SA_TEST_CATEGORY(TRAIT, TYPE, EXPECT)	\
+  SA(TRAIT(TYPE) == EXPECT);					\
+  SA(TRAIT(const TYPE) == EXPECT);				\
+  SA(TRAIT(volatile TYPE) == EXPECT);			\
+  SA(TRAIT(const volatile TYPE) == EXPECT)
+
+class ClassType { };
+class IncompleteClass;
+union IncompleteUnion;
+
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, int[2], false);
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, int[], true);
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, int[2][3], false);
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, int[][3], true);
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, float*[2], false);
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, float*[], true);
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, float*[2][3], false);
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, float*[][3], true);
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, ClassType[2], false);
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, ClassType[], true);
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, ClassType[2][3], false);
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, ClassType[][3], true);
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, IncompleteClass[2][3], false);
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, IncompleteClass[][3], true);
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, int(*)[2], false);
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, int(*)[], false);
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, int(&)[2], false);
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, int(&)[], false);
+
+// Sanity check.
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, ClassType, false);
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, IncompleteClass, false);
+SA_TEST_CATEGORY(__builtin_is_unbounded_array, IncompleteUnion, false);