Use the multiple argument form of path::append.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@185164 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/ToolChains.cpp b/lib/Driver/ToolChains.cpp
index 47a5f33..854a6f4 100644
--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
@@ -222,9 +222,7 @@
   SmallString<128> P(getDriver().ClangExecutable);
   llvm::sys::path::remove_filename(P); // 'clang'
   llvm::sys::path::remove_filename(P); // 'bin'
-  llvm::sys::path::append(P, "lib");
-  llvm::sys::path::append(P, "arc");
-  llvm::sys::path::append(P, "libarclite_");
+  llvm::sys::path::append(P, "lib", "arc", "libarclite_");
   // Mash in the platform.
   if (isTargetIOSSimulator())
     P += "iphonesimulator";
@@ -242,9 +240,7 @@
                                     const char *DarwinStaticLib,
                                     bool AlwaysLink) const {
   SmallString<128> P(getDriver().ResourceDir);
-  llvm::sys::path::append(P, "lib");
-  llvm::sys::path::append(P, "darwin");
-  llvm::sys::path::append(P, DarwinStaticLib);
+  llvm::sys::path::append(P, "lib", "darwin", DarwinStaticLib);
 
   // For now, allow missing resource libraries to support developers who may
   // not have compiler-rt checked out or integrated into their build (unless
@@ -539,9 +535,7 @@
     // Check in the sysroot first.
     if (const Arg *A = Args.getLastArg(options::OPT_isysroot)) {
       SmallString<128> P(A->getValue());
-      llvm::sys::path::append(P, "usr");
-      llvm::sys::path::append(P, "lib");
-      llvm::sys::path::append(P, "libstdc++.dylib");
+      llvm::sys::path::append(P, "usr", "lib", "libstdc++.dylib");
 
       if (!llvm::sys::fs::exists(P.str())) {
         llvm::sys::path::remove_filename(P);
@@ -577,8 +571,7 @@
   // only present in the gcc lib dir, which makes it hard to find).
 
   SmallString<128> P(getDriver().ResourceDir);
-  llvm::sys::path::append(P, "lib");
-  llvm::sys::path::append(P, "darwin");
+  llvm::sys::path::append(P, "lib", "darwin");
 
   // Use the newer cc_kext for iOS ARM after 6.0.
   if (!isTargetIPhoneOS() || isTargetIOSSimulator() ||
diff --git a/lib/Frontend/CompilerInvocation.cpp b/lib/Frontend/CompilerInvocation.cpp
index f362226..d8b4392 100644
--- a/lib/Frontend/CompilerInvocation.cpp
+++ b/lib/Frontend/CompilerInvocation.cpp
@@ -852,9 +852,7 @@
     llvm::sys::path::remove_filename(P); // Remove /bin   from foo/bin
 
     // Get foo/lib/clang/<version>/include
-    llvm::sys::path::append(P, "lib");
-    llvm::sys::path::append(P, "clang");
-    llvm::sys::path::append(P, CLANG_VERSION_STRING);
+    llvm::sys::path::append(P, "lib", "clang", CLANG_VERSION_STRING);
   }
 
   return P.str();
diff --git a/lib/Lex/ModuleMap.cpp b/lib/Lex/ModuleMap.cpp
index 4c876f9..d411ead 100644
--- a/lib/Lex/ModuleMap.cpp
+++ b/lib/Lex/ModuleMap.cpp
@@ -507,8 +507,7 @@
 
   // Look for an umbrella header.
   SmallString<128> UmbrellaName = StringRef(FrameworkDir->getName());
-  llvm::sys::path::append(UmbrellaName, "Headers");
-  llvm::sys::path::append(UmbrellaName, ModuleName + ".h");
+  llvm::sys::path::append(UmbrellaName, "Headers", ModuleName + ".h");
   const FileEntry *UmbrellaHeader = FileMgr.getFile(UmbrellaName);
   
   // FIXME: If there's no umbrella header, we could probably scan the
@@ -1324,10 +1323,8 @@
     return;
   
   // Add Frameworks/Name.framework for each subframework.
-  for (unsigned I = Paths.size() - 1; I != 0; --I) {
-    llvm::sys::path::append(Path, "Frameworks");
-    llvm::sys::path::append(Path, Paths[I-1] + ".framework");
-  }
+  for (unsigned I = Paths.size() - 1; I != 0; --I)
+    llvm::sys::path::append(Path, "Frameworks", Paths[I-1] + ".framework");
 }
 
 /// \brief Parse a header declaration.
@@ -1378,15 +1375,13 @@
       appendSubframeworkPaths(ActiveModule, PathName);
       
       // Check whether this file is in the public headers.
-      llvm::sys::path::append(PathName, "Headers");
-      llvm::sys::path::append(PathName, FileName);
+      llvm::sys::path::append(PathName, "Headers", FileName);
       File = SourceMgr.getFileManager().getFile(PathName);
       
       if (!File) {
         // Check whether this file is in the private headers.
         PathName.resize(PathLength);
-        llvm::sys::path::append(PathName, "PrivateHeaders");
-        llvm::sys::path::append(PathName, FileName);
+        llvm::sys::path::append(PathName, "PrivateHeaders", FileName);
         File = SourceMgr.getFileManager().getFile(PathName);
       }
     } else {