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[v12,35/40] c++: Implement __is_unsigned built-in trait

Message ID 20230915022305.74083-36-kmatsui@gcc.gnu.org
State New
Headers show
Series Optimize type traits performance | expand

Commit Message

Ken Matsui Sept. 15, 2023, 2:21 a.m. UTC 
This patch implements built-in trait for std::is_unsigned.

gcc/cp/ChangeLog:

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

gcc/testsuite/ChangeLog:

	* g++.dg/ext/has-builtin-1.C: Test existence of __is_unsigned.
	* g++.dg/ext/is_unsigned.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_unsigned.C   | 47 ++++++++++++++++++++++++
 5 files changed, 58 insertions(+)
 create mode 100644 gcc/testsuite/g++.dg/ext/is_unsigned.C
diff mbox series

Patch

diff --git a/gcc/cp/constraint.cc b/gcc/cp/constraint.cc
index 3a7f968eae8..c28dad702c3 100644
--- a/gcc/cp/constraint.cc
+++ b/gcc/cp/constraint.cc
@@ -3829,6 +3829,9 @@  diagnose_trait_expr (tree expr, tree args)
     case CPTK_IS_UNION:
       inform (loc, "  %qT is not a union", t1);
       break;
+    case CPTK_IS_UNSIGNED:
+      inform (loc, "  %qT is not an unsigned type", t1);
+      break;
     case CPTK_IS_VOLATILE:
       inform (loc, "  %qT is not a volatile type", t1);
       break;
diff --git a/gcc/cp/cp-trait.def b/gcc/cp/cp-trait.def
index 06c203ce4de..611e84cbbfd 100644
--- a/gcc/cp/cp-trait.def
+++ b/gcc/cp/cp-trait.def
@@ -94,6 +94,7 @@  DEFTRAIT_EXPR (IS_TRIVIALLY_CONSTRUCTIBLE, "__is_trivially_constructible", -1)
 DEFTRAIT_EXPR (IS_TRIVIALLY_COPYABLE, "__is_trivially_copyable", 1)
 DEFTRAIT_EXPR (IS_UNBOUNDED_ARRAY, "__is_unbounded_array", 1)
 DEFTRAIT_EXPR (IS_UNION, "__is_union", 1)
+DEFTRAIT_EXPR (IS_UNSIGNED, "__is_unsigned", 1)
 DEFTRAIT_EXPR (IS_VOLATILE, "__is_volatile", 1)
 DEFTRAIT_EXPR (REF_CONSTRUCTS_FROM_TEMPORARY, "__reference_constructs_from_temporary", 2)
 DEFTRAIT_EXPR (REF_CONVERTS_FROM_TEMPORARY, "__reference_converts_from_temporary", 2)
diff --git a/gcc/cp/semantics.cc b/gcc/cp/semantics.cc
index 553a51dc16d..b5c6b4992e5 100644
--- a/gcc/cp/semantics.cc
+++ b/gcc/cp/semantics.cc
@@ -12235,6 +12235,9 @@  trait_expr_value (cp_trait_kind kind, tree type1, tree type2)
     case CPTK_IS_UNION:
       return type_code1 == UNION_TYPE;
 
+    case CPTK_IS_UNSIGNED:
+      return TYPE_UNSIGNED (type1);
+
     case CPTK_IS_VOLATILE:
       return CP_TYPE_VOLATILE_P (type1);
 
@@ -12410,6 +12413,7 @@  finish_trait_expr (location_t loc, cp_trait_kind kind, tree type1, tree type2)
     case CPTK_IS_SCOPED_ENUM:
     case CPTK_IS_UNBOUNDED_ARRAY:
     case CPTK_IS_UNION:
+    case CPTK_IS_UNSIGNED:
     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 4bc85f4babb..3d380f94b06 100644
--- a/gcc/testsuite/g++.dg/ext/has-builtin-1.C
+++ b/gcc/testsuite/g++.dg/ext/has-builtin-1.C
@@ -164,6 +164,9 @@ 
 #if !__has_builtin (__is_union)
 # error "__has_builtin (__is_union) failed"
 #endif
+#if !__has_builtin (__is_unsigned)
+# error "__has_builtin (__is_unsigned) failed"
+#endif
 #if !__has_builtin (__is_volatile)
 # error "__has_builtin (__is_volatile) failed"
 #endif
diff --git a/gcc/testsuite/g++.dg/ext/is_unsigned.C b/gcc/testsuite/g++.dg/ext/is_unsigned.C
new file mode 100644
index 00000000000..2bb45d209a7
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/is_unsigned.C
@@ -0,0 +1,47 @@ 
+// { dg-do compile { target c++11 } }
+
+#include <testsuite_tr1.h>
+
+using namespace __gnu_test;
+
+#define SA(X) static_assert((X),#X)
+#define SA_TEST_CATEGORY(TRAIT, X, expect) \
+  SA(TRAIT(X) == expect);                  \
+  SA(TRAIT(const X) == expect);            \
+  SA(TRAIT(volatile X) == expect);         \
+  SA(TRAIT(const volatile X) == expect)
+
+SA_TEST_CATEGORY(__is_unsigned, void, false);
+
+SA_TEST_CATEGORY(__is_unsigned, bool, (bool(-1) > bool(0)));
+SA_TEST_CATEGORY(__is_unsigned, char, (char(-1) > char(0)));
+SA_TEST_CATEGORY(__is_unsigned, signed char, false);
+SA_TEST_CATEGORY(__is_unsigned, unsigned char, true);
+SA_TEST_CATEGORY(__is_unsigned, wchar_t, (wchar_t(-1) > wchar_t(0)));
+SA_TEST_CATEGORY(__is_unsigned, short, false);
+SA_TEST_CATEGORY(__is_unsigned, unsigned short, true);
+SA_TEST_CATEGORY(__is_unsigned, int, false);
+SA_TEST_CATEGORY(__is_unsigned, unsigned int, true);
+SA_TEST_CATEGORY(__is_unsigned, long, false);
+SA_TEST_CATEGORY(__is_unsigned, unsigned long, true);
+SA_TEST_CATEGORY(__is_unsigned, long long, false);
+SA_TEST_CATEGORY(__is_unsigned, unsigned long long, true);
+
+SA_TEST_CATEGORY(__is_unsigned, float, false);
+SA_TEST_CATEGORY(__is_unsigned, double, false);
+SA_TEST_CATEGORY(__is_unsigned, long double, false);
+
+#ifndef __STRICT_ANSI__
+// GNU Extensions.
+#ifdef __SIZEOF_INT128__
+SA_TEST_CATEGORY(__is_unsigned, unsigned __int128, true);
+SA_TEST_CATEGORY(__is_unsigned, __int128, false);
+#endif
+
+#ifdef _GLIBCXX_USE_FLOAT128
+SA_TEST_CATEGORY(__is_unsigned, __float128, false);
+#endif
+#endif
+
+// Sanity check.
+SA_TEST_CATEGORY(__is_unsigned, ClassType, false);