Share /machine: handling code with llvm-cvtres too

r363016 let lld-link and llvm-lib share the /machine: parsing code.
This lets llvm-cvtres share it as well.

Making llvm-cvtres depend on llvm-lib seemed a bit strange (it doesn't
need llvm-lib's dependencies on BinaryFormat and BitReader) and I
couldn't find a good place to put this code. Since it's just a few
lines, put it in lib/Object for now.

Differential Revision: https://reviews.llvm.org/D63120

llvm-svn: 363144

1 files changed, 44 insertions, 0 deletions

diff --git a/llvm/lib/Object/WindowsMachineFlag.cpp b/llvm/lib/Object/WindowsMachineFlag.cpp
new file mode 100644
index 00000000000..f7f2b20ae1a
--- /dev/null
+++ b/llvm/lib/Object/WindowsMachineFlag.cpp
@@ -0,0 +1,44 @@
+//===- WindowsMachineFlag.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
+//
+//===----------------------------------------------------------------------===//
+//
+// Functions for implementing the /machine: flag.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Object/WindowsMachineFlag.h"
+
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/BinaryFormat/COFF.h"
+
+using namespace llvm;
+
+// Returns /machine's value.
+COFF::MachineTypes llvm::getMachineType(StringRef S) {
+  return StringSwitch<COFF::MachineTypes>(S.lower())
+      .Cases("x64", "amd64", COFF::IMAGE_FILE_MACHINE_AMD64)
+      .Cases("x86", "i386", COFF::IMAGE_FILE_MACHINE_I386)
+      .Case("arm", COFF::IMAGE_FILE_MACHINE_ARMNT)
+      .Case("arm64", COFF::IMAGE_FILE_MACHINE_ARM64)
+      .Default(COFF::IMAGE_FILE_MACHINE_UNKNOWN);
+}
+
+StringRef llvm::machineToStr(COFF::MachineTypes MT) {
+  switch (MT) {
+  case COFF::IMAGE_FILE_MACHINE_ARMNT:
+    return "arm";
+  case COFF::IMAGE_FILE_MACHINE_ARM64:
+    return "arm64";
+  case COFF::IMAGE_FILE_MACHINE_AMD64:
+    return "x64";
+  case COFF::IMAGE_FILE_MACHINE_I386:
+    return "x86";
+  default:
+    llvm_unreachable("unknown machine type");
+  }
+}