Imported Upstream version 5.18.0.161

Former-commit-id: 4db48158d3a35497b8f118ab21b5f08ac3d86d98

external/llvm/lib/Support/Windows/Host.inc

@@ -0,0 +1,34 @@
+//===- llvm/Support/Win32/Host.inc ------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Win32 Host support.
+//
+//===----------------------------------------------------------------------===//
+
+#include "WindowsSupport.h"
+#include <cstdio>
+#include <string>
+
+using namespace llvm;
+
+static std::string updateTripleOSVersion(std::string Triple) {
+  return Triple;
+}
+
+std::string sys::getDefaultTargetTriple() {
+  const char *Triple = LLVM_DEFAULT_TARGET_TRIPLE;
+
+  // Override the default target with an environment variable named by LLVM_TARGET_TRIPLE_ENV.
+#if defined(LLVM_TARGET_TRIPLE_ENV)
+  if (const char *EnvTriple = std::getenv(LLVM_TARGET_TRIPLE_ENV))
+    Triple = EnvTriple;
+#endif
+
+  return Triple::normalize(Triple);
+}