Fix issues reported by -Wrange-loop-analysis when building with latest Clang (trunk). NFC.

Fixes warning: loop variable 'E' of type 'const llvm::StringRef' creates a copy from type 'const llvm::StringRef' [-Wrange-loop-analysis]

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/Support/Windows/Program.inc b/llvm/lib/Support/Windows/Program.inc
index a23ed95fc39..a1482bf17c6 100644
--- a/llvm/lib/Support/Windows/Program.inc
+++ b/llvm/lib/Support/Windows/Program.inc
@@ -197,7 +197,7 @@ static bool Execute(ProcessInfo &PI, StringRef Program,
     // An environment block consists of a null-terminated block of
     // null-terminated strings. Convert the array of environment variables to
     // an environment block by concatenating them.
-    for (const auto E : *Env) {
+    for (StringRef E : *Env) {
       SmallVector<wchar_t, MAX_PATH> EnvString;
       if (std::error_code ec = windows::UTF8ToUTF16(E, EnvString)) {
         SetLastError(ec.value());