[llvm-driver] Fix usage of `InitLLVM` on Windows (#76306)

Previously, some tools such as `clang` or `lld` which require strict
order for certain command-line options, such as `clang -cc1` or `lld
-flavor`, would not longer work on Windows, when these tools were linked
as part of `llvm-driver`. This was caused by `InitLLVM` which was part
of the `*_main()` function of these tools, which in turn calls
`windows::GetCommandLineArguments`. That function completly replaces
argc/argv by new UTF-8 contents, so any ajustements to argc/argv made by
`llvm-driver` prior to calling these tools was reset.

`InitLLVM` is now called by the `llvm-driver`. Any tool that
participates in (or is part of) the `llvm-driver` doesn't call
`InitLLVM` anymore.

1 files changed, 0 insertions, 3 deletions

diff --git a/llvm/tools/llvm-dwp/llvm-dwp.cpp b/llvm/tools/llvm-dwp/llvm-dwp.cpp
index a6b8643..81556b3 100644
--- a/llvm/tools/llvm-dwp/llvm-dwp.cpp
+++ b/llvm/tools/llvm-dwp/llvm-dwp.cpp
@@ -27,7 +27,6 @@
 #include "llvm/Option/Option.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/FileSystem.h"
-#include "llvm/Support/InitLLVM.h"
 #include "llvm/Support/LLVMDriver.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/TargetSelect.h"
@@ -120,8 +119,6 @@ static Expected<Triple> readTargetTriple(StringRef FileName) {
 }
 
 int llvm_dwp_main(int argc, char **argv, const llvm::ToolContext &) {
-  InitLLVM X(argc, argv);
-
   DwpOptTable Tbl;
   llvm::BumpPtrAllocator A;
   llvm::StringSaver Saver{A};