[SystemZ][z/OS] Propagate IsText parameter to open text files as text (#107906)

This patch adds an IsText parameter to the following functions
openFileForRead, getBufferForFile, getBufferForFileImpl and determines
whether a file is text by querying the file tag on z/OS. The default is
set to OF_Text instead of OF_None, this change in value does not affect
any other platforms other than z/OS.

1 files changed, 3 insertions, 3 deletions

diff --git a/clang/unittests/Frontend/PCHPreambleTest.cpp b/clang/unittests/Frontend/PCHPreambleTest.cpp
index 2ce24c9..137dcf2 100644
--- a/clang/unittests/Frontend/PCHPreambleTest.cpp
+++ b/clang/unittests/Frontend/PCHPreambleTest.cpp
@@ -36,10 +36,10 @@ class ReadCountingInMemoryFileSystem : public vfs::InMemoryFileSystem
   std::map<std::string, unsigned> ReadCounts;
 
 public:
-  ErrorOr<std::unique_ptr<vfs::File>> openFileForRead(const Twine &Path) override
-  {
+  ErrorOr<std::unique_ptr<vfs::File>>
+  openFileForRead(const Twine &Path, bool IsText = true) override {
     ++ReadCounts[Canonicalize(Path)];
-    return InMemoryFileSystem::openFileForRead(Path);
+    return InMemoryFileSystem::openFileForRead(Path, IsText);
   }
 
   unsigned GetReadCount(const Twine &Path) const