[NFC] Reordering parameters in getFile and getFileOrSTDIN

In future patches I will be setting the IsText parameter frequently so I will refactor the args to be in the following order. I have removed the FileSize parameter because it is never used.

```
  static ErrorOr<std::unique_ptr<MemoryBuffer>>
  getFile(const Twine &Filename, bool IsText = false,
          bool RequiresNullTerminator = true, bool IsVolatile = false);

  static ErrorOr<std::unique_ptr<MemoryBuffer>>
  getFileOrSTDIN(const Twine &Filename, bool IsText = false,
                 bool RequiresNullTerminator = true);

 static ErrorOr<std::unique_ptr<MB>>
 getFileAux(const Twine &Filename, uint64_t MapSize, uint64_t Offset,
            bool IsText, bool RequiresNullTerminator, bool IsVolatile);

  static ErrorOr<std::unique_ptr<WritableMemoryBuffer>>
  getFile(const Twine &Filename, bool IsVolatile = false);
```

Reviewed By: jhenderson

Differential Revision: https://reviews.llvm.org/D99182

1 files changed, 4 insertions, 4 deletions

diff --git a/llvm/lib/ToolDrivers/llvm-lib/LibDriver.cpp b/llvm/lib/ToolDrivers/llvm-lib/LibDriver.cpp
index f3904b9..80d3033 100644
--- a/llvm/lib/ToolDrivers/llvm-lib/LibDriver.cpp
+++ b/llvm/lib/ToolDrivers/llvm-lib/LibDriver.cpp
@@ -112,8 +112,8 @@ static void doList(opt::InputArgList& Args) {
   std::unique_ptr<MemoryBuffer> B;
   for (auto *Arg : Args.filtered(OPT_INPUT)) {
     // Create or open the archive object.
-    ErrorOr<std::unique_ptr<MemoryBuffer>> MaybeBuf =
-        MemoryBuffer::getFile(Arg->getValue(), -1, false);
+    ErrorOr<std::unique_ptr<MemoryBuffer>> MaybeBuf = MemoryBuffer::getFile(
+        Arg->getValue(), /*IsText=*/false, /*RequiresNullTerminator=*/false);
     fatalOpenError(errorCodeToError(MaybeBuf.getError()), Arg->getValue());
 
     if (identify_magic(MaybeBuf.get()->getBuffer()) == file_magic::archive) {
@@ -339,8 +339,8 @@ int llvm::libDriverMain(ArrayRef<const char *> ArgsArr) {
       continue;
 
     // Open a file.
-    ErrorOr<std::unique_ptr<MemoryBuffer>> MOrErr =
-        MemoryBuffer::getFile(Path, -1, false);
+    ErrorOr<std::unique_ptr<MemoryBuffer>> MOrErr = MemoryBuffer::getFile(
+        Path, /*IsText=*/false, /*RequiresNullTerminator=*/false);
     fatalOpenError(errorCodeToError(MOrErr.getError()), Path);
     MemoryBufferRef MBRef = (*MOrErr)->getMemBufferRef();