c++, libstdc++: Add typeinfo for _Float{16,32,64,128,32x,64x} and __bf16 types [PR108075]

The following patch adds typeinfos for the extended floating point
types and _Float{32,64}x.

2022-12-15  Jakub Jelinek  <jakub@redhat.com>

	PR libstdc++/108075
gcc/cp/
	* rtti.cc (emit_support_tinfos): Add pointers to
	{bfloat16,float{16,32,64,128,32x,64x,128x}}_type_node to fundamentals
	array.
gcc/testsuite/
	* g++.dg/cpp23/ext-floating13.C: New test.
libstdc++-v3/
	* config/abi/pre/gnu.ver (CXXABI_1.3.14): Export
	_ZTIDF[0-9]*[_bx], _ZTIPDF[0-9]*[_bx] and _ZTIPKDF[0-9]*[_bx].
	* testsuite/util/testsuite_abi.cc (check_version): Handle
	CXXABI_1.3.14.

4 files changed, 50 insertions, 2 deletions

diff --git a/gcc/cp/rtti.cc b/gcc/cp/rtti.cc
index a85c7b5..c2cf78d 100644
--- a/gcc/cp/rtti.cc
+++ b/gcc/cp/rtti.cc
@@ -1603,7 +1603,9 @@ emit_support_tinfos (void)
     &long_long_integer_type_node, &long_long_unsigned_type_node,
     &float_type_node, &double_type_node, &long_double_type_node,
     &dfloat32_type_node, &dfloat64_type_node, &dfloat128_type_node,
-    &nullptr_type_node,
+    &bfloat16_type_node, &float16_type_node, &float32_type_node,
+    &float64_type_node, &float128_type_node, &float32x_type_node,
+    &float64x_type_node, &float128x_type_node, &nullptr_type_node,
     0
   };
   int ix;
diff --git a/gcc/testsuite/g++.dg/cpp23/ext-floating13.C b/gcc/testsuite/g++.dg/cpp23/ext-floating13.C
new file mode 100644
index 0000000..fd36c50
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp23/ext-floating13.C
@@ -0,0 +1,35 @@
+// P1467R9 - Extended floating-point types and standard names.
+// { dg-do link { target c++23 } }
+// { dg-options "" }
+
+#include <typeinfo>
+
+#ifdef __STDCPP_FLOAT16_T__
+const std::type_info &a = typeid(decltype(0.0f16));
+#endif
+#ifdef __STDCPP_BFLOAT16_T__
+const std::type_info &b = typeid(decltype(0.0bf16));
+#endif
+#ifdef __STDCPP_FLOAT32_T__
+const std::type_info &c = typeid(decltype(0.0f32));
+#endif
+#ifdef __STDCPP_FLOAT64_T__
+const std::type_info &d = typeid(decltype(0.0f64));
+#endif
+#ifdef __STDCPP_FLOAT128_T__
+const std::type_info &e = typeid(decltype(0.0f128));
+#endif
+#ifdef __FLT32X_MAX__
+const std::type_info &f = typeid(decltype(0.0f32x));
+#endif
+#ifdef __FLT64X_MAX__
+const std::type_info &g = typeid(decltype(0.0f64x));
+#endif
+#ifdef __FLT128X_MAX__
+const std::type_info &h = typeid(decltype(0.0f128x));
+#endif
+
+int
+main ()
+{
+}
diff --git a/libstdc++-v3/config/abi/pre/gnu.ver b/libstdc++-v3/config/abi/pre/gnu.ver
index 225d6dc..667cc4d 100644
--- a/libstdc++-v3/config/abi/pre/gnu.ver
+++ b/libstdc++-v3/config/abi/pre/gnu.ver
@@ -2794,6 +2794,16 @@ CXXABI_1.3.13 {
 
 } CXXABI_1.3.12;
 
+CXXABI_1.3.14 {
+
+    # typeinfo for _Float{16,32,64,128,32x,64x,128x} and
+    # __bf16
+    _ZTIDF[0-9]*[_bx];
+    _ZTIPDF[0-9]*[_bx];
+    _ZTIPKDF[0-9]*[_bx];
+
+} CXXABI_1.3.13;
+
 # Symbols in the support library (libsupc++) supporting transactional memory.
 CXXABI_TM_1 {
 
diff --git a/libstdc++-v3/testsuite/util/testsuite_abi.cc b/libstdc++-v3/testsuite/util/testsuite_abi.cc
index 09bd00e..27616f5 100644
--- a/libstdc++-v3/testsuite/util/testsuite_abi.cc
+++ b/libstdc++-v3/testsuite/util/testsuite_abi.cc
@@ -230,6 +230,7 @@ check_version(symbol& test, bool added)
       known_versions.push_back("CXXABI_1.3.11");
       known_versions.push_back("CXXABI_1.3.12");
       known_versions.push_back("CXXABI_1.3.13");
+      known_versions.push_back("CXXABI_1.3.14");
       known_versions.push_back("CXXABI_IEEE128_1.3.13");
       known_versions.push_back("CXXABI_TM_1");
       known_versions.push_back("CXXABI_FLOAT128");
@@ -251,7 +252,7 @@ check_version(symbol& test, bool added)
       bool latestp = (test.version_name == "GLIBCXX_3.4.31"
 	  // XXX remove next line when baselines have been regenerated.
 		     || test.version_name == "GLIBCXX_IEEE128_3.4.30"
-		     || test.version_name == "CXXABI_1.3.13"
+		     || test.version_name == "CXXABI_1.3.14"
 		     || test.version_name == "CXXABI_FLOAT128"
 		     || test.version_name == "CXXABI_TM_1");
       if (added && !latestp)