r224956 - Fix use-after-destruction introduced in r224924.

[Alexey Samsonov]

Author: samsonov
Date: Mon Dec 29 15:28:15 2014
New Revision: 224956

URL: http://llvm.org/viewvc/llvm-project?rev=224956&view=rev
Log:
Fix use-after-destruction introduced in r224924.

getMainExecutable() returns a std::string, assigning its result
to StringRef immediately creates a dangling pointer. This was
detected by half-broken fast-MSan-bootstrap bot.

Modified:
    cfe/trunk/lib/Frontend/CompilerInvocation.cpp

Modified: cfe/trunk/lib/Frontend/CompilerInvocation.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/CompilerInvocation.cpp?rev=224956&r1=224955&r2=224956&view=diff
==============================================================================
--- cfe/trunk/lib/Frontend/CompilerInvocation.cpp (original)
+++ cfe/trunk/lib/Frontend/CompilerInvocation.cpp Mon Dec 29 15:28:15 2014
@@ -983,7 +983,8 @@ static InputKind ParseFrontendArgs(Front
 
 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
                                                  void *MainAddr) {
-  StringRef ClangExecutable = llvm::sys::fs::getMainExecutable(Argv0, MainAddr);
+  std::string ClangExecutable =
+      llvm::sys::fs::getMainExecutable(Argv0, MainAddr);
   StringRef Dir = llvm::sys::path::parent_path(ClangExecutable);
 
   // Compute the path to the resource directory.