[2/3] d: Add TARGET_D_REGISTER_CPU_TARGET_INFO

diff --git a/gcc/config/aarch64/aarch64-d.c b/gcc/config/aarch64/aarch64-d.c
index 4fce593ac27..416bb7c8033 100644
--- a/gcc/config/aarch64/aarch64-d.c
+++ b/gcc/config/aarch64/aarch64-d.c
@@ -31,3 +31,26 @@  aarch64_d_target_versions (void)
   d_add_builtin_version ("AArch64");
   d_add_builtin_version ("D_HardFloat");
 }
+
+/* Handle a call to `__traits(getTargetInfo, "floatAbi")'.  */
+
+static tree
+aarch64_d_handle_target_float_abi (void)
+{
+  const char *abi = "hard";
+
+  return build_string_literal (strlen (abi) + 1, abi);
+}
+
+/* Implement TARGET_D_REGISTER_CPU_TARGET_INFO.  */
+
+void
+aarch64_d_register_target_info (void)
+{
+  const struct d_target_info_spec handlers[] = {
+    { "floatAbi", aarch64_d_handle_target_float_abi },
+    { NULL, NULL },
+  };
+
+  d_add_target_info_handlers (handlers);
+}
diff --git a/gcc/config/aarch64/aarch64-protos.h b/gcc/config/aarch64/aarch64-protos.h
index d5d5417370e..c2033387384 100644
--- a/gcc/config/aarch64/aarch64-protos.h
+++ b/gcc/config/aarch64/aarch64-protos.h
@@ -1011,6 +1011,7 @@  std::string aarch64_get_extension_string_for_isa_flags (uint64_t, uint64_t);
 
 /* Defined in aarch64-d.c  */
 extern void aarch64_d_target_versions (void);
+extern void aarch64_d_register_target_info (void);
 
 rtl_opt_pass *make_pass_fma_steering (gcc::context *);
 rtl_opt_pass *make_pass_track_speculation (gcc::context *);
diff --git a/gcc/config/aarch64/aarch64.h b/gcc/config/aarch64/aarch64.h
index d0bae617674..bfffbcd6abf 100644
--- a/gcc/config/aarch64/aarch64.h
+++ b/gcc/config/aarch64/aarch64.h
@@ -26,8 +26,9 @@ 
 #define TARGET_CPU_CPP_BUILTINS()	\
   aarch64_cpu_cpp_builtins (pfile)
 
-/* Target CPU versions for D.  */
+/* Target hooks for D language.  */
 #define TARGET_D_CPU_VERSIONS aarch64_d_target_versions
+#define TARGET_D_REGISTER_CPU_TARGET_INFO aarch64_d_register_target_info
 
 
 
diff --git a/gcc/config/arm/arm-d.c b/gcc/config/arm/arm-d.c
index 2cb9f4bd899..5f43ef9b179 100644
--- a/gcc/config/arm/arm-d.c
+++ b/gcc/config/arm/arm-d.c
@@ -53,3 +53,45 @@  arm_d_target_versions (void)
   else if (TARGET_HARD_FLOAT)
     d_add_builtin_version ("D_HardFloat");
 }
+
+/* Handle a call to `__traits(getTargetInfo, "floatAbi")'.  */
+
+static tree
+arm_d_handle_target_float_abi (void)
+{
+  const char *abi;
+
+  switch (arm_float_abi)
+    {
+    case ARM_FLOAT_ABI_HARD:
+      abi = "hard";
+      break;
+
+    case ARM_FLOAT_ABI_SOFT:
+      abi = "soft";
+      break;
+
+    case ARM_FLOAT_ABI_SOFTFP:
+      abi = "softfp";
+      break;
+
+    default:
+      abi = "";
+      break;
+    }
+
+  return build_string_literal (strlen (abi) + 1, abi);
+}
+
+/* Implement TARGET_D_REGISTER_CPU_TARGET_INFO.  */
+
+void
+arm_d_register_target_info (void)
+{
+  const struct d_target_info_spec handlers[] = {
+    { "floatAbi", arm_d_handle_target_float_abi },
+    { NULL, NULL },
+  };
+
+  d_add_target_info_handlers (handlers);
+}
diff --git a/gcc/config/arm/arm-protos.h b/gcc/config/arm/arm-protos.h
index 952a8256a19..25215417751 100644
--- a/gcc/config/arm/arm-protos.h
+++ b/gcc/config/arm/arm-protos.h
@@ -397,6 +397,7 @@  extern void arm_cpu_cpp_builtins (struct cpp_reader *);
 
 /* Defined in arm-d.c  */
 extern void arm_d_target_versions (void);
+extern void arm_d_register_target_info (void);
 
 extern bool arm_is_constant_pool_ref (rtx);
 
diff --git a/gcc/config/arm/arm.h b/gcc/config/arm/arm.h
index 113c015c455..c70af57b5f6 100644
--- a/gcc/config/arm/arm.h
+++ b/gcc/config/arm/arm.h
@@ -47,8 +47,9 @@  extern char arm_arch_name[];
 /* Target CPU builtins.  */
 #define TARGET_CPU_CPP_BUILTINS() arm_cpu_cpp_builtins (pfile)
 
-/* Target CPU versions for D.  */
+/* Target hooks for D language.  */
 #define TARGET_D_CPU_VERSIONS arm_d_target_versions
+#define TARGET_D_REGISTER_CPU_TARGET_INFO arm_d_register_target_info
 
 #include "config/arm/arm-opts.h"
 
diff --git a/gcc/config/i386/i386-d.c b/gcc/config/i386/i386-d.c
index 58b4790fdad..da5958c3e7d 100644
--- a/gcc/config/i386/i386-d.c
+++ b/gcc/config/i386/i386-d.c
@@ -45,6 +45,34 @@  ix86_d_target_versions (void)
     d_add_builtin_version ("D_SoftFloat");
 }
 
+/* Handle a call to `__traits(getTargetInfo, "floatAbi")'.  */
+
+static tree
+ix86_d_handle_target_float_abi (void)
+{
+  const char *abi;
+
+  if (! (TARGET_80387 || TARGET_FLOAT_RETURNS_IN_80387))
+    abi = "soft";
+  else
+    abi = "hard";
+
+  return build_string_literal (strlen (abi) + 1, abi);
+}
+
+/* Implement TARGET_D_REGISTER_CPU_TARGET_INFO.  */
+
+void
+ix86_d_register_target_info (void)
+{
+  const struct d_target_info_spec handlers[] = {
+    { "floatAbi", ix86_d_handle_target_float_abi },
+    { NULL, NULL },
+  };
+
+  d_add_target_info_handlers (handlers);
+}
+
 /* Implement TARGET_D_HAS_STDCALL_CONVENTION for x86 targets.  */
 
 bool
diff --git a/gcc/config/i386/i386-protos.h b/gcc/config/i386/i386-protos.h
index acfb9f5fe87..7782cf1163f 100644
--- a/gcc/config/i386/i386-protos.h
+++ b/gcc/config/i386/i386-protos.h
@@ -264,6 +264,7 @@  extern void ix86_register_pragmas (void);
 
 /* In i386-d.c  */
 extern void ix86_d_target_versions (void);
+extern void ix86_d_register_target_info (void);
 extern bool ix86_d_has_stdcall_convention (unsigned int *, unsigned int *);
 
 /* In winnt.c  */
diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h
index 17e233a4e74..13174e7aa70 100644
--- a/gcc/config/i386/i386.h
+++ b/gcc/config/i386/i386.h
@@ -803,6 +803,7 @@  extern const char *host_detect_local_cpu (int argc, const char **argv);
 
 /* Target hooks for D language.  */
 #define TARGET_D_CPU_VERSIONS ix86_d_target_versions
+#define TARGET_D_REGISTER_CPU_TARGET_INFO ix86_d_register_target_info
 #define TARGET_D_HAS_STDCALL_CONVENTION ix86_d_has_stdcall_convention
 
 #ifndef CC1_SPEC
diff --git a/gcc/config/mips/mips-d.c b/gcc/config/mips/mips-d.c
index dc57127791c..e03f48602ef 100644
--- a/gcc/config/mips/mips-d.c
+++ b/gcc/config/mips/mips-d.c
@@ -56,3 +56,33 @@  mips_d_target_versions (void)
       d_add_builtin_version ("D_SoftFloat");
     }
 }
+
+/* Handle a call to `__traits(getTargetInfo, "floatAbi")'.  */
+
+static tree
+mips_d_handle_target_float_abi (void)
+{
+  const char *abi;
+
+  if (TARGET_HARD_FLOAT_ABI)
+    abi = "hard";
+  else if (TARGET_SOFT_FLOAT_ABI)
+    abi = "soft";
+  else
+    abi = "";
+
+  return build_string_literal (strlen (abi) + 1, abi);
+}
+
+/* Implement TARGET_D_REGISTER_CPU_TARGET_INFO.  */
+
+void
+mips_d_register_target_info (void)
+{
+  const struct d_target_info_spec handlers[] = {
+    { "floatAbi", mips_d_handle_target_float_abi },
+    { NULL, NULL },
+  };
+
+  d_add_target_info_handlers (handlers);
+}
diff --git a/gcc/config/mips/mips-protos.h b/gcc/config/mips/mips-protos.h
index 72bbbe2d5e4..2cf4ed50292 100644
--- a/gcc/config/mips/mips-protos.h
+++ b/gcc/config/mips/mips-protos.h
@@ -388,5 +388,6 @@  extern void mips_expand_vec_cond_expr (machine_mode, machine_mode, rtx *);
 
 /* Routines implemented in mips-d.c  */
 extern void mips_d_target_versions (void);
+extern void mips_d_register_target_info (void);
 
 #endif /* ! GCC_MIPS_PROTOS_H */
diff --git a/gcc/config/mips/mips.h b/gcc/config/mips/mips.h
index b4a60a55d80..47aac9d3d61 100644
--- a/gcc/config/mips/mips.h
+++ b/gcc/config/mips/mips.h
@@ -658,8 +658,9 @@  struct mips_cpu_info {
     }									\
   while (0)
 
-/* Target CPU versions for D.  */
+/* Target hooks for D language.  */
 #define TARGET_D_CPU_VERSIONS mips_d_target_versions
+#define TARGET_D_REGISTER_CPU_TARGET_INFO mips_d_register_target_info
 
 /* Default target_flags if no switches are specified  */
 
diff --git a/gcc/config/pa/pa-d.c b/gcc/config/pa/pa-d.c
index 663e749995a..41b2f1848e7 100644
--- a/gcc/config/pa/pa-d.c
+++ b/gcc/config/pa/pa-d.c
@@ -39,3 +39,31 @@  pa_d_target_versions (void)
   else
     d_add_builtin_version ("D_HardFloat");
 }
+
+/* Handle a call to `__traits(getTargetInfo, "floatAbi")'.  */
+
+static tree
+pa_d_handle_target_float_abi (void)
+{
+  const char *abi;
+
+  if (TARGET_DISABLE_FPREGS || TARGET_SOFT_FLOAT)
+    abi = "soft";
+  else
+    abi = "hard";
+
+  return build_string_literal (strlen (abi) + 1, abi);
+}
+
+/* Implement TARGET_D_REGISTER_CPU_TARGET_INFO.  */
+
+void
+pa_d_register_target_info (void)
+{
+  const struct d_target_info_spec handlers[] = {
+    { "floatAbi", pa_d_handle_target_float_abi },
+    { NULL, NULL },
+  };
+
+  d_add_target_info_handlers (handlers);
+}
diff --git a/gcc/config/pa/pa-protos.h b/gcc/config/pa/pa-protos.h
index 0e1e471da5f..5bf6fef4968 100644
--- a/gcc/config/pa/pa-protos.h
+++ b/gcc/config/pa/pa-protos.h
@@ -115,3 +115,4 @@  extern const int pa_magic_milli[];
 
 /* Routines implemented in pa-d.c  */
 extern void pa_d_target_versions (void);
+extern void pa_d_register_target_info (void);
diff --git a/gcc/config/pa/pa.h b/gcc/config/pa/pa.h
index 3ec015a8480..fbb96045a51 100644
--- a/gcc/config/pa/pa.h
+++ b/gcc/config/pa/pa.h
@@ -1302,8 +1302,9 @@  do {									     \
 
 #define NEED_INDICATE_EXEC_STACK 0
 
-/* Target CPU versions for D.  */
+/* Target hooks for D language.  */
 #define TARGET_D_CPU_VERSIONS pa_d_target_versions
+#define TARGET_D_REGISTER_CPU_TARGET_INFO pa_d_register_target_info
 
 /* Output default function prologue for hpux.  */
 #define TARGET_ASM_FUNCTION_PROLOGUE pa_output_function_prologue
diff --git a/gcc/config/riscv/riscv-d.c b/gcc/config/riscv/riscv-d.c
index b20b778bd35..cf7729d9e4d 100644
--- a/gcc/config/riscv/riscv-d.c
+++ b/gcc/config/riscv/riscv-d.c
@@ -39,3 +39,50 @@  riscv_d_target_versions (void)
   else
     d_add_builtin_version ("D_SoftFloat");
 }
+
+
+/* Handle a call to `__traits(getTargetInfo, "floatAbi")'.  */
+
+static tree
+riscv_d_handle_target_float_abi (void)
+{
+  const char *abi;
+
+  switch (riscv_abi)
+    {
+    case ABI_ILP32E:
+    case ABI_ILP32:
+    case ABI_LP64:
+      abi = "soft";
+      break;
+
+    case ABI_ILP32F:
+    case ABI_LP64F:
+      abi = "single";
+      break;
+
+    case ABI_ILP32D:
+    case ABI_LP64D:
+      abi = "double";
+      break;
+
+    default:
+      abi = "";
+      break;
+    }
+
+  return build_string_literal (strlen (abi) + 1, abi);
+}
+
+/* Implement TARGET_D_REGISTER_CPU_TARGET_INFO.  */
+
+void
+riscv_d_register_target_info (void)
+{
+  const struct d_target_info_spec handlers[] = {
+    { "floatAbi", riscv_d_handle_target_float_abi },
+    { NULL, NULL },
+  };
+
+  d_add_target_info_handlers (handlers);
+}
diff --git a/gcc/config/riscv/riscv-protos.h b/gcc/config/riscv/riscv-protos.h
index cc0be7e7270..43d7224d694 100644
--- a/gcc/config/riscv/riscv-protos.h
+++ b/gcc/config/riscv/riscv-protos.h
@@ -80,6 +80,7 @@  void riscv_cpu_cpp_builtins (cpp_reader *);
 
 /* Routines implemented in riscv-d.c  */
 extern void riscv_d_target_versions (void);
+extern void riscv_d_register_target_info (void);
 
 /* Routines implemented in riscv-builtins.c.  */
 extern void riscv_atomic_assign_expand_fenv (tree *, tree *, tree *);
diff --git a/gcc/config/riscv/riscv.h b/gcc/config/riscv/riscv.h
index 3cc3e864a3e..d17096e1dfa 100644
--- a/gcc/config/riscv/riscv.h
+++ b/gcc/config/riscv/riscv.h
@@ -27,8 +27,9 @@  along with GCC; see the file COPYING3.  If not see
 /* Target CPU builtins.  */
 #define TARGET_CPU_CPP_BUILTINS() riscv_cpu_cpp_builtins (pfile)
 
-/* Target CPU versions for D.  */
+/* Target hooks for D language.  */
 #define TARGET_D_CPU_VERSIONS riscv_d_target_versions
+#define TARGET_D_REGISTER_CPU_TARGET_INFO riscv_d_register_target_info
 
 #ifdef TARGET_BIG_ENDIAN_DEFAULT
 #define DEFAULT_ENDIAN_SPEC    "b"
diff --git a/gcc/config/rs6000/rs6000-d.c b/gcc/config/rs6000/rs6000-d.c
index 6bfe8130dd3..755de42733b 100644
--- a/gcc/config/rs6000/rs6000-d.c
+++ b/gcc/config/rs6000/rs6000-d.c
@@ -45,3 +45,33 @@  rs6000_d_target_versions (void)
       d_add_builtin_version ("D_SoftFloat");
     }
 }
+
+/* Handle a call to `__traits(getTargetInfo, "floatAbi")'.  */
+
+static tree
+rs6000_d_handle_target_float_abi (void)
+{
+  const char *abi;
+
+  if (TARGET_HARD_FLOAT)
+    abi = "hard";
+  else if (TARGET_SOFT_FLOAT)
+    abi = "soft";
+  else
+    abi = "";
+
+  return build_string_literal (strlen (abi) + 1, abi);
+}
+
+/* Implement TARGET_D_REGISTER_CPU_TARGET_INFO.  */
+
+void
+rs6000_d_register_target_info (void)
+{
+  const struct d_target_info_spec handlers[] = {
+    { "floatAbi", rs6000_d_handle_target_float_abi },
+    { NULL, NULL },
+  };
+
+  d_add_target_info_handlers (handlers);
+}
diff --git a/gcc/config/rs6000/rs6000-protos.h b/gcc/config/rs6000/rs6000-protos.h
index c44fd3d0263..a06a147c339 100644
--- a/gcc/config/rs6000/rs6000-protos.h
+++ b/gcc/config/rs6000/rs6000-protos.h
@@ -298,6 +298,7 @@  extern void (*rs6000_target_modify_macros_ptr) (bool, HOST_WIDE_INT,
 
 /* Declare functions in rs6000-d.c  */
 extern void rs6000_d_target_versions (void);
+extern void rs6000_d_register_target_info (void);
 
 #ifdef NO_DOLLAR_IN_LABEL
 const char * rs6000_xcoff_strip_dollar (const char *);
diff --git a/gcc/config/rs6000/rs6000.h b/gcc/config/rs6000/rs6000.h
index 233a92baf3c..164d359b724 100644
--- a/gcc/config/rs6000/rs6000.h
+++ b/gcc/config/rs6000/rs6000.h
@@ -641,8 +641,9 @@  extern unsigned char rs6000_recip_bits[];
 #define TARGET_CPU_CPP_BUILTINS() \
   rs6000_cpu_cpp_builtins (pfile)
 
-/* Target CPU versions for D.  */
+/* Target hooks for D language.  */
 #define TARGET_D_CPU_VERSIONS rs6000_d_target_versions
+#define TARGET_D_REGISTER_CPU_TARGET_INFO rs6000_d_register_target_info
 
 /* This is used by rs6000_cpu_cpp_builtins to indicate the byte order
    we're compiling for.  Some configurations may need to override it.  */
diff --git a/gcc/config/s390/s390-d.c b/gcc/config/s390/s390-d.c
index 2f945ebfa12..1a990636aa1 100644
--- a/gcc/config/s390/s390-d.c
+++ b/gcc/config/s390/s390-d.c
@@ -41,3 +41,33 @@  s390_d_target_versions (void)
   else if (TARGET_HARD_FLOAT)
     d_add_builtin_version ("D_HardFloat");
 }
+
+/* Handle a call to `__traits(getTargetInfo, "floatAbi")'.  */
+
+static tree
+s390_d_handle_target_float_abi (void)
+{
+  const char *abi;
+
+  if (TARGET_HARD_FLOAT)
+    abi = "hard";
+  else if (TARGET_SOFT_FLOAT)
+    abi = "soft";
+  else
+    abi = "";
+
+  return build_string_literal (strlen (abi) + 1, abi);
+}
+
+/* Implement TARGET_D_REGISTER_CPU_TARGET_INFO.  */
+
+void
+s390_d_register_target_info (void)
+{
+  const struct d_target_info_spec handlers[] = {
+    { "floatAbi", s390_d_handle_target_float_abi },
+    { NULL, NULL },
+  };
+
+  d_add_target_info_handlers (handlers);
+}
diff --git a/gcc/config/s390/s390-protos.h b/gcc/config/s390/s390-protos.h
index acbdf66483a..289e018cf0f 100644
--- a/gcc/config/s390/s390-protos.h
+++ b/gcc/config/s390/s390-protos.h
@@ -173,6 +173,7 @@  extern bool s390_const_operand_ok (tree, int, int, tree);
 
 /* s390-d.c routines */
 extern void s390_d_target_versions (void);
+extern void s390_d_register_target_info (void);
 
 /* Pass management.  */
 namespace gcc { class context; }
diff --git a/gcc/config/s390/s390.h b/gcc/config/s390/s390.h
index 991af969c87..3b876160420 100644
--- a/gcc/config/s390/s390.h
+++ b/gcc/config/s390/s390.h
@@ -247,8 +247,9 @@  enum processor_flags
 /* Target CPU builtins.  */
 #define TARGET_CPU_CPP_BUILTINS() s390_cpu_cpp_builtins (pfile)
 
-/* Target CPU versions for D.  */
+/* Target hooks for D language.  */
 #define TARGET_D_CPU_VERSIONS s390_d_target_versions
+#define TARGET_D_REGISTER_CPU_TARGET_INFO s390_d_register_target_info
 
 #ifdef DEFAULT_TARGET_64BIT
 #define TARGET_DEFAULT     (MASK_64BIT | MASK_ZARCH | MASK_HARD_DFP	\
diff --git a/gcc/config/sparc/sparc-d.c b/gcc/config/sparc/sparc-d.c
index 0eb663bb132..cfb8daee25e 100644
--- a/gcc/config/sparc/sparc-d.c
+++ b/gcc/config/sparc/sparc-d.c
@@ -48,3 +48,31 @@  sparc_d_target_versions (void)
       d_add_builtin_version ("SPARC_SoftFloat");
     }
 }
+
+/* Handle a call to `__traits(getTargetInfo, "floatAbi")'.  */
+
+static tree
+sparc_d_handle_target_float_abi (void)
+{
+  const char *abi;
+
+  if (TARGET_FPU)
+    abi = "hard";
+  else
+    abi = "soft";
+
+  return build_string_literal (strlen (abi) + 1, abi);
+}
+
+/* Implement TARGET_D_REGISTER_CPU_TARGET_INFO.  */
+
+void
+sparc_d_register_target_info (void)
+{
+  const struct d_target_info_spec handlers[] = {
+    { "floatAbi", sparc_d_handle_target_float_abi },
+    { NULL, NULL },
+  };
+
+  d_add_target_info_handlers (handlers);
+}
diff --git a/gcc/config/sparc/sparc-protos.h b/gcc/config/sparc/sparc-protos.h
index ef94d4fd893..ad875cc07f2 100644
--- a/gcc/config/sparc/sparc-protos.h
+++ b/gcc/config/sparc/sparc-protos.h
@@ -113,5 +113,6 @@  extern rtl_opt_pass *make_pass_work_around_errata (gcc::context *);
 
 /* Routines implemented in sparc-d.c  */
 extern void sparc_d_target_versions (void);
+extern void sparc_d_register_target_info (void);
 
 #endif /* __SPARC_PROTOS_H__ */
diff --git a/gcc/config/sparc/sparc.h b/gcc/config/sparc/sparc.h
index cec2f5a1207..48345753b6f 100644
--- a/gcc/config/sparc/sparc.h
+++ b/gcc/config/sparc/sparc.h
@@ -27,8 +27,9 @@  along with GCC; see the file COPYING3.  If not see
 
 #define TARGET_CPU_CPP_BUILTINS() sparc_target_macros ()
 
-/* Target CPU versions for D.  */
+/* Target hooks for D language.  */
 #define TARGET_D_CPU_VERSIONS sparc_d_target_versions
+#define TARGET_D_REGISTER_CPU_TARGET_INFO sparc_d_register_target_info
 
 /* Specify this in a cover file to provide bi-architecture (32/64) support.  */
 /* #define SPARC_BI_ARCH */
diff --git a/gcc/d/d-target.cc b/gcc/d/d-target.cc
index f1814df110d..d576b74af1c 100644
--- a/gcc/d/d-target.cc
+++ b/gcc/d/d-target.cc
@@ -198,6 +198,7 @@  Target::_init (const Param &)
 
   /* Initialize target info tables, the keys required by the language are added
      last, so that the OS and CPU handlers can override.  */
+  targetdm.d_register_cpu_target_info ();
   d_add_target_info_handlers (d_language_target_info);
 }
 
diff --git a/gcc/d/d-target.def b/gcc/d/d-target.def
index f79ffb9cd7d..cd0397c1577 100644
--- a/gcc/d/d-target.def
+++ b/gcc/d/d-target.def
@@ -46,6 +46,18 @@  relating to the target operating system.",
  void, (void),
  hook_void_void)
 
+/* getTargetInfo keys relating to the target CPU.  */
+DEFHOOK
+(d_register_cpu_target_info,
+ "Register all target information keys relating to the target CPU using the\n\
+function @code{d_add_target_info_handlers}, which takes a\n\
+@samp{struct d_target_info_spec} (defined in @file{d/d-target.h}).  The keys\n\
+added by this hook are made available at compile time by the\n\
+@code{__traits(getTargetInfo)} extension, the result is an expression\n\
+describing the requested target information.",
+ void, (void),
+ hook_void_void)
+
 /* ModuleInfo section name and brackets.  */
 DEFHOOKPOD
 (d_minfo_section,
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi
index 71607c4dc4e..6201df9a67d 100644
--- a/gcc/doc/tm.texi
+++ b/gcc/doc/tm.texi
@@ -10808,6 +10808,15 @@  Similarly to @code{TARGET_D_CPU_VERSIONS}, but is used for versions
 relating to the target operating system.
 @end deftypefn
 
+@deftypefn {D Target Hook} void TARGET_D_REGISTER_CPU_TARGET_INFO (void)
+Register all target information keys relating to the target CPU using the
+function @code{d_add_target_info_handlers}, which takes a
+@samp{struct d_target_info_spec} (defined in @file{d/d-target.h}).  The keys
+added by this hook are made available at compile time by the
+@code{__traits(getTargetInfo)} extension, the result is an expression
+describing the requested target information.
+@end deftypefn
+
 @deftypevr {D Target Hook} {const char *} TARGET_D_MINFO_SECTION
 Contains the name of the section in which module info references should be
 placed.  This section is expected to be bracketed by two symbols to indicate
diff --git a/gcc/doc/tm.texi.in b/gcc/doc/tm.texi.in
index c8880dafcd4..bde57585b03 100644
--- a/gcc/doc/tm.texi.in
+++ b/gcc/doc/tm.texi.in
@@ -7357,6 +7357,8 @@  floating-point support; they are not included in this mechanism.
 
 @hook TARGET_D_OS_VERSIONS
 
+@hook TARGET_D_REGISTER_CPU_TARGET_INFO
+
 @hook TARGET_D_MINFO_SECTION
 
 @hook TARGET_D_MINFO_START_NAME