[PGO] Enable clang to pass compiler-rt profile support library to linker on Windows

Summary: This change enables clang to automatically link binaries built with the -fprofile-instr-generate against the clang_rt.profile-i386.lib library.

Reviewers: davidxl, dnovillo

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D15833

llvm-svn: 256855
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index a8f4afa..7af1899 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -9473,6 +9473,8 @@
     A.renderAsInput(Args, CmdArgs);
   }
 
+  TC.addProfileRTLibs(Args, CmdArgs);
+
   // We need to special case some linker paths.  In the case of lld, we need to
   // translate 'lld' into 'lld-link', and in the case of the regular msvc
   // linker, we need to use a special search algorithm.