Reland [clang-repl] Expose setter for triple in IncrementalCompilerBuilder (#84174)

With out-of-process execution the target triple can be different from
the one on the host. We need an interface to configure it.

Relanding this with cleanup-fixes in the unittest.

1 files changed, 47 insertions, 0 deletions

diff --git a/clang/unittests/Interpreter/IncrementalCompilerBuilderTest.cpp b/clang/unittests/Interpreter/IncrementalCompilerBuilderTest.cpp
new file mode 100644
index 0000000..f729566
--- /dev/null
+++ b/clang/unittests/Interpreter/IncrementalCompilerBuilderTest.cpp
@@ -0,0 +1,47 @@
+//=== unittests/Interpreter/IncrementalCompilerBuilderTest.cpp ------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Basic/TargetOptions.h"
+#include "clang/Frontend/CompilerInstance.h"
+#include "clang/Interpreter/Interpreter.h"
+#include "clang/Lex/PreprocessorOptions.h"
+#include "llvm/Support/Error.h"
+#include "gtest/gtest.h"
+
+using namespace llvm;
+using namespace clang;
+
+namespace {
+
+// Usually FrontendAction takes the raw pointers and wraps them back into
+// unique_ptrs in InitializeFileRemapping()
+static void cleanupRemappedFileBuffers(CompilerInstance &CI) {
+  for (const auto &RB : CI.getPreprocessorOpts().RemappedFileBuffers) {
+    delete RB.second;
+  }
+  CI.getPreprocessorOpts().clearRemappedFiles();
+}
+
+TEST(IncrementalCompilerBuilder, SetCompilerArgs) {
+  std::vector<const char *> ClangArgv = {"-Xclang", "-ast-dump-all"};
+  auto CB = clang::IncrementalCompilerBuilder();
+  CB.SetCompilerArgs(ClangArgv);
+  auto CI = cantFail(CB.CreateCpp());
+  EXPECT_TRUE(CI->getFrontendOpts().ASTDumpAll);
+  cleanupRemappedFileBuffers(*CI);
+}
+
+TEST(IncrementalCompilerBuilder, SetTargetTriple) {
+  auto CB = clang::IncrementalCompilerBuilder();
+  CB.SetTargetTriple("armv6-none-eabi");
+  auto CI = cantFail(CB.CreateCpp());
+  EXPECT_EQ(CI->getTargetOpts().Triple, "armv6-none-unknown-eabi");
+  cleanupRemappedFileBuffers(*CI);
+}
+
+} // end anonymous namespace