clang_delta: support HIP (.hip) inputs on LLVM 17+ (#489)

mgcarrasco · web-flow · commit a2759392ed09 · 2026-04-08T19:16:39.000+02:00
clang_delta cannot parse files with .hip extension, the PR extends the
parsing logic. Otherwise, clang_delta fails with an Unsupported file
type! error message.
diff --git a/clang_delta/CMakeLists.txt b/clang_delta/CMakeLists.txt
@@ -87,6 +87,8 @@ set(SOURCE_FILES
   "/tests/empty-struct-to-int/test2.output"
   "/tests/empty-struct-to-int/test3.c"
   "/tests/empty-struct-to-int/test3.output"
+  "/tests/hip/kernel.hip"
+  "/tests/hip/kernel.output"
   "/tests/instantiate-template-param/default_param.cc"
   "/tests/instantiate-template-param/default_param.output"
   "/tests/instantiate-template-param/test1.cc"
diff --git a/clang_delta/TransformationManager.cpp b/clang_delta/TransformationManager.cpp
@@ -187,6 +187,18 @@ bool TransformationManager::initializeCompilerInstance(std::string &ErrorMsg)
                                Language::OpenCL,
 			       T, includes);
   }
+#if LLVM_VERSION_MAJOR >= 17
+  else if (IK.getLanguage() == Language::HIP) {
+    std::vector<const char *> Args;
+    Args.push_back("-x");
+    Args.push_back("hip");
+
+    CompilerInvocation::CreateFromArgs(Invocation, Args,
+                                       ClangInstance->getDiagnostics());
+    LangOptions::setLangDefaults(ClangInstance->getLangOpts(), Language::HIP,
+                                 T, includes, LSTD);
+  }
+#endif
   else {
     ErrorMsg = "Unsupported file type!";
     return false;
diff --git a/clang_delta/tests/hip/kernel.hip b/clang_delta/tests/hip/kernel.hip
@@ -0,0 +1,10 @@
+int a1[10];
+
+void foo() {
+  char a;
+  int t = 1;
+  ((char (*)[t]) a)[0][0] = 0;
+  a1[1] = 1;
+}
+
+__global__ void k() {}
diff --git a/clang_delta/tests/hip/kernel.output b/clang_delta/tests/hip/kernel.output
@@ -0,0 +1,11 @@
+int a1[10];
+int a1_1;
+
+void foo() {
+  char a;
+  int t = 1;
+  ((char (*)[t]) a)[0][0] = 0;
+  a1_1 = 1;
+}
+
+__global__ void k() {}
diff --git a/clang_delta/tests/test_clang_delta.py b/clang_delta/tests/test_clang_delta.py
@@ -1308,6 +1308,13 @@ def test_simplify_simple_recursive_template(self):
             '--transformation=simplify-recursive-template-instantiation --counter=1',
         )
 
+    @unittest.skipIf(get_clang_version() < 17, 'HIP input requires LLVM 17+')
+    def test_hip_kernel_aggregate_to_scalar(self):
+        self.check_clang_delta(
+            'hip/kernel.hip',
+            '--transformation=aggregate-to-scalar --counter=1',
+        )
+
     def test_template_arg_to_int_not_valid_5(self):
         self.check_query_instances(
             'template-arg-to-int/not_valid5.cc',
