Reland "[gn build] (manually) port 8b409ea"

This reverts commit 4060016
and re-merges c5b8146.

Author: nico

llvm/utils/gn/secondary/clang/include/clang/Basic/BUILD.gn

@@ -119,6 +119,16 @@ clang_tablegen("arm_mve_builtin_aliases") {
   td_file = "arm_mve.td"
 }
 
+clang_tablegen("arm_sve_builtins") {
+  args = [ "-gen-arm-sve-builtins" ]
+  td_file = "arm_sve.td"
+}
+
+clang_tablegen("arm_sve_codegenmap") {
+  args = [ "-gen-arm-sve-codegenmap" ]
+  td_file = "arm_sve.td"
+}
+
 clang_tablegen("arm_cde_builtins") {
   args = [ "-gen-arm-cde-builtin-def" ]
   td_file = "arm_cde.td"

llvm/utils/gn/secondary/clang/lib/Basic/BUILD.gn

@@ -26,6 +26,7 @@ static_library("Basic") {
     "//clang/include/clang/Basic:DiagnosticGroups",
     "//clang/include/clang/Basic:arm_cde_builtins",
     "//clang/include/clang/Basic:arm_mve_builtins",
+    "//clang/include/clang/Basic:arm_sve_builtins",
     "//clang/include/clang/Basic:diags_tablegen",
     "//clang/include/clang/Basic:version",
   ]

llvm/utils/gn/secondary/clang/lib/CodeGen/BUILD.gn

@@ -4,6 +4,7 @@ static_library("CodeGen") {
   deps = [
     "//clang/include/clang/Basic:arm_cde_builtin_cg",
     "//clang/include/clang/Basic:arm_mve_builtin_cg",
+    "//clang/include/clang/Basic:arm_sve_codegenmap",
     "//clang/lib/AST",
     "//clang/lib/Analysis",
     "//clang/lib/Basic",

llvm/utils/gn/secondary/clang/utils/TableGen/BUILD.gn

@@ -3,6 +3,11 @@ executable("clang-tblgen") {
     "//llvm/lib/Support",
     "//llvm/lib/TableGen",
   ]
+
+  # FIXME: This is incorrect, see https://reviews.llvm.org/D75470#inline-695187
+  # Remoe again once that's rectified.
+  include_dirs = [ "//clang/include" ]
+
   sources = [
     "ASTTableGen.cpp",
     "ClangASTNodesEmitter.cpp",