[OpenCL] Fix pipe built-in functions return type.

By default return type of call expressions calling built-in
functions is set to bool.

Fixes https://llvm.org/bugs/show_bug.cgi?id=30219.

Reviewers: Anastasia

Subscribers: dmitry, cfe-commits, yaxunl

Differential Revision: https://reviews.llvm.org/D24136

llvm-svn: 280800
diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp
index 6edb251..81dc237 100644
--- a/clang/lib/Sema/SemaChecking.cpp
+++ b/clang/lib/Sema/SemaChecking.cpp
@@ -1020,6 +1020,7 @@
     // check for the argument.
     if (SemaBuiltinRWPipe(*this, TheCall))
       return ExprError();
+    TheCall->setType(Context.IntTy);
     break;
   case Builtin::BIreserve_read_pipe:
   case Builtin::BIreserve_write_pipe:
@@ -1047,6 +1048,7 @@
   case Builtin::BIget_pipe_max_packets:
     if (SemaBuiltinPipePackets(*this, TheCall))
       return ExprError();
+    TheCall->setType(Context.UnsignedIntTy);
     break;
   case Builtin::BIto_global:
   case Builtin::BIto_local: