[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/llvm/unittests/Support/VirtualFileSystemTest.cpp b/llvm/unittests/Support/VirtualFileSystemTest.cpp
index eb590e4..219aaef 100644
--- a/llvm/unittests/Support/VirtualFileSystemTest.cpp
+++ b/llvm/unittests/Support/VirtualFileSystemTest.cpp
@@ -67,7 +67,7 @@ public:
     return I->second;
   }
   ErrorOr<std::unique_ptr<vfs::File>>
-  openFileForRead(const Twine &Path) override {
+  openFileForRead(const Twine &Path, bool IsText = true) override {
     auto S = status(Path);
     if (S)
       return std::unique_ptr<vfs::File>(new DummyFile{*S});
@@ -3389,9 +3389,9 @@ TEST(RedirectingFileSystemTest, ExternalPaths) {
     }
 
     llvm::ErrorOr<std::unique_ptr<llvm::vfs::File>>
-    openFileForRead(const Twine &Path) override {
+    openFileForRead(const Twine &Path, bool IsText = true) override {
       SeenPaths.push_back(Path.str());
-      return ProxyFileSystem::openFileForRead(Path);
+      return ProxyFileSystem::openFileForRead(Path, IsText);
     }
 
     std::error_code isLocal(const Twine &Path, bool &Result) override {