[libclang] Introduce an API to get the include-tree CASID

clang/include/clang-c/Dependencies.h

@@ -550,8 +550,20 @@ CINDEX_LINKAGE CXCStringArray
 CINDEX_LINKAGE CXCStringArray
     clang_experimental_DepGraphModule_getBuildArguments(CXDepGraphModule);
 
+/**
+ * @returns the CASID of the include-tree for this module, if any.
+ *
+ * The string is only valid to use while the \c CXDepGraphModule object is
+ * valid.
+ */
+CINDEX_LINKAGE const char *
+    clang_experimental_DepGraphModule_getIncludeTreeID(CXDepGraphModule);
+
 /**
  * \returns the \c ActionCache key for this module, if any.
+ *
+ * The string is only valid to use while the \c CXDepGraphModule object is
+ * valid.
  */
 CINDEX_LINKAGE
 const char *clang_experimental_DepGraphModule_getCacheKey(CXDepGraphModule);
@@ -596,6 +608,9 @@ CINDEX_LINKAGE CXCStringArray
 
 /**
  * \returns the \c ActionCache key for this translation unit, if any.
+ *
+ * The string is only valid to use while the \c CXDepGraphTUCommand object is
+ * valid.
  */
 CINDEX_LINKAGE const char *
     clang_experimental_DepGraphTUCommand_getCacheKey(CXDepGraphTUCommand);
@@ -619,6 +634,14 @@ CXCStringArray clang_experimental_DepGraph_getTUFileDeps(CXDepGraph);
 CINDEX_LINKAGE
 CXCStringArray clang_experimental_DepGraph_getTUModuleDeps(CXDepGraph);
 
+/**
+ * @returns the CASID of the include-tree for this TU, if any.
+ *
+ * The string is only valid to use while the \c CXDepGraph object is valid.
+ */
+CINDEX_LINKAGE
+const char *clang_experimental_DepGraph_getTUIncludeTreeID(CXDepGraph);
+
 /**
  * \returns the context hash of the C++20 module this translation unit exports.
  *

clang/test/Index/Core/scan-deps-cas.m

@@ -71,6 +71,7 @@
 // INCLUDE_TREE-NEXT:     name: ModA
 // INCLUDE_TREE-NEXT:     context-hash: [[HASH_MOD_A:[A-Z0-9]+]]
 // INCLUDE_TREE-NEXT:     module-map-path: [[PREFIX]]/Inputs/module/module.modulemap
+// INCLUDE_TREE-NEXT:     include-tree-id: [[ModA_INCLUDE_TREE_ID:llvmcas://[[:xdigit:]]+]]
 // INCLUDE_TREE-NEXT:     cache-key: [[ModA_CACHE_KEY:llvmcas://[[:xdigit:]]+]]
 // INCLUDE_TREE-NEXT:     module-deps:
 // INCLUDE_TREE-NEXT:     file-deps:
@@ -81,12 +82,13 @@
 // INCLUDE_TREE-NEXT:     build-args:
 // INCLUDE_TREE-SAME:       -cc1
 // INCLUDE_TREE-SAME:       -fcas-path
-// INCLUDE_TREE-SAME:       -fcas-include-tree llvmcas://{{[[:xdigit:]]+}}
+// INCLUDE_TREE-SAME:       -fcas-include-tree [[ModA_INCLUDE_TREE_ID]]
 // INCLUDE_TREE-SAME:       -fcache-compile-job
 
 // INCLUDE_TREE:      dependencies:
 // INCLUDE_TREE-NEXT:   command 0:
 // INCLUDE_TREE-NEXT:     context-hash: [[HASH_TU:[A-Z0-9]+]]
+// INCLUDE_TREE-NEXT:     include-tree-id: [[INC_TU_INCLUDE_TREE_ID:llvmcas://[[:xdigit:]]+]]
 // INCLUDE_TREE-NEXT:     cache-key: [[INC_TU_CACHE_KEY:llvmcas://[[:xdigit:]]+]]
 // INCLUDE_TREE-NEXT:     module-deps:
 // INCLUDE_TREE-NEXT:       ModA:[[HASH_MOD_A]]
@@ -95,7 +97,7 @@
 // INCLUDE_TREE-NEXT:     build-args:
 // INCLUDE_TREE-SAME:       -cc1
 // INCLUDE_TREE-SAME:       -fcas-path
-// INCLUDE_TREE-SAME:       -fcas-include-tree llvmcas://{{[[:xdigit:]]+}}
+// INCLUDE_TREE-SAME:       -fcas-include-tree [[INC_TU_INCLUDE_TREE_ID]]
 // INCLUDE_TREE-SAME:       -fcache-compile-job
 // INCLUDE_TREE-SAME:       -fmodule-file-cache-key [[PCM:.*ModA_.*pcm]] [[ModA_CACHE_KEY]]
-// INCLUDE_TREE-SAME:       -fmodule-file={{(ModA=)?}}[[PCM]]
+// INCLUDE_TREE-SAME:       -fmodule-file={{(ModA=)?}}[[PCM]]

clang/tools/c-index-test/core_main.cpp

@@ -760,11 +760,13 @@ static int scanDeps(ArrayRef<const char *> Args, std::string WorkingDirectory,
       char *Output, size_t MaxLen)>(LookupOutput);
 
   unsigned CommandIndex = 0;
-  auto HandleCommand = [&](const char *ContextHash, CXCStringArray ModuleDeps,
-                           CXCStringArray FileDeps, CXCStringArray Args,
-                           const char *CacheKey) {
+  auto HandleCommand = [&](const char *ContextHash, const char *IncludeTreeID,
+                           CXCStringArray ModuleDeps, CXCStringArray FileDeps,
+                           CXCStringArray Args, const char *CacheKey) {
     llvm::outs() << "  command " << CommandIndex++ << ":\n";
     llvm::outs() << "    context-hash: " << ContextHash << "\n";
+    if (IncludeTreeID)
+      llvm::outs() << "    include-tree-id: " << IncludeTreeID << "\n";
     if (CacheKey)
       llvm::outs() << "    cache-key: " << CacheKey << "\n";
     llvm::outs() << "    module-deps:\n";
@@ -805,6 +807,8 @@ static int scanDeps(ArrayRef<const char *> Args, std::string WorkingDirectory,
           clang_experimental_DepGraphModule_getContextHash(Mod);
       const char *ModuleMapPath =
           clang_experimental_DepGraphModule_getModuleMapPath(Mod);
+      const char *ModuleIncludeTreeID =
+          clang_experimental_DepGraphModule_getIncludeTreeID(Mod);
       const char *ModuleCacheKey =
           clang_experimental_DepGraphModule_getCacheKey(Mod);
       CXCStringArray ModuleDeps =
@@ -820,6 +824,8 @@ static int scanDeps(ArrayRef<const char *> Args, std::string WorkingDirectory,
                    << "    context-hash: " << ContextHash << "\n"
                    << "    module-map-path: "
                    << (ModuleMapPath ? ModuleMapPath : "<none>") << "\n";
+      if (ModuleIncludeTreeID)
+        llvm::outs() << "    include-tree-id: " << ModuleIncludeTreeID << "\n";
       if (ModuleCacheKey)
         llvm::outs() << "    cache-key: " << ModuleCacheKey << "\n";
       llvm::outs() << "    module-deps:\n";
@@ -837,6 +843,8 @@ static int scanDeps(ArrayRef<const char *> Args, std::string WorkingDirectory,
     }
 
     llvm::outs() << "dependencies:\n";
+    const char *TUIncludeTreeID =
+        clang_experimental_DepGraph_getTUIncludeTreeID(Graph);
     const char *TUContextHash =
         clang_experimental_DepGraph_getTUContextHash(Graph);
     CXCStringArray TUModuleDeps =
@@ -853,7 +861,8 @@ static int scanDeps(ArrayRef<const char *> Args, std::string WorkingDirectory,
           clang_experimental_DepGraphTUCommand_getCacheKey(Cmd);
       auto Dispose = llvm::make_scope_exit(
           [&]() { clang_experimental_DepGraphTUCommand_dispose(Cmd); });
-      HandleCommand(TUContextHash, TUModuleDeps, TUFileDeps, Args, CacheKey);
+      HandleCommand(TUContextHash, TUIncludeTreeID, TUModuleDeps, TUFileDeps,
+                    Args, CacheKey);
     }
     return 0;
   }

clang/tools/libclang/CDependencies.cpp

@@ -596,6 +596,14 @@ clang_experimental_DepGraphModule_getBuildArguments(CXDepGraphModule CXDepMod) {
       ModDeps.getBuildArguments());
 }
 
+const char *
+clang_experimental_DepGraphModule_getIncludeTreeID(CXDepGraphModule CXDepMod) {
+  ModuleDeps &ModDeps = *unwrap(CXDepMod)->ModDeps;
+  if (ModDeps.IncludeTreeID)
+    return ModDeps.IncludeTreeID->c_str();
+  return nullptr;
+}
+
 const char *
 clang_experimental_DepGraphModule_getCacheKey(CXDepGraphModule CXDepMod) {
   ModuleDeps &ModDeps = *unwrap(CXDepMod)->ModDeps;
@@ -653,6 +661,13 @@ CXCStringArray clang_experimental_DepGraph_getTUModuleDeps(CXDepGraph Graph) {
   return unwrap(Graph)->StrMgr.createCStringsOwned(std::move(Modules));
 }
 
+const char *clang_experimental_DepGraph_getTUIncludeTreeID(CXDepGraph Graph) {
+  TranslationUnitDeps &TUDeps = unwrap(Graph)->TUDeps;
+  if (TUDeps.IncludeTreeID)
+    return TUDeps.IncludeTreeID->c_str();
+  return nullptr;
+}
+
 const char *clang_experimental_DepGraph_getTUContextHash(CXDepGraph Graph) {
   TranslationUnitDeps &TUDeps = unwrap(Graph)->TUDeps;
   return TUDeps.ID.ContextHash.c_str();

clang/tools/libclang/libclang.map

@@ -523,12 +523,14 @@ LLVM_16 {
     clang_experimental_DepGraph_getTUCommand;
     clang_experimental_DepGraph_getTUContextHash;
     clang_experimental_DepGraph_getTUFileDeps;
+    clang_experimental_DepGraph_getTUIncludeTreeID;
     clang_experimental_DepGraph_getTUModuleDeps;
     clang_experimental_DepGraphModule_dispose;
     clang_experimental_DepGraphModule_getBuildArguments;
     clang_experimental_DepGraphModule_getCacheKey;
     clang_experimental_DepGraphModule_getContextHash;
     clang_experimental_DepGraphModule_getFileDeps;
+    clang_experimental_DepGraphModule_getIncludeTreeID;
     clang_experimental_DepGraphModule_getModuleDeps;
     clang_experimental_DepGraphModule_getModuleMapPath;
     clang_experimental_DepGraphModule_getName;