[OpenMP] Set pragma start loc to `#pragma` loc

This patch adjusts `PragmaOpenMPHandler` to set the location of
`tok::annot_pragma_openmp` to the `#pragma` location instead of the
`omp` location so that the former becomes the start location of the
OpenMP AST node.  This can be useful when, for example, rewriting a
directive using Clang's Rewrite facility.  Most of this patch updates
tests for changes to locations in diagnostics and `-ast-dump` output.

Reviewed By: ABataev, lebedev.ri, Meinersbur, aaron.ballman

Differential Revision: https://reviews.llvm.org/D61509

llvm-svn: 361867

1 files changed, 1 insertions, 1 deletions

diff --git a/clang/lib/Parse/ParsePragma.cpp b/clang/lib/Parse/ParsePragma.cpp
index 6cf313e3009..5b9749c80aa 100644
--- a/clang/lib/Parse/ParsePragma.cpp
+++ b/clang/lib/Parse/ParsePragma.cpp
@@ -2217,7 +2217,7 @@ void PragmaOpenMPHandler::HandlePragma(Preprocessor &PP,
   Token Tok;
   Tok.startToken();
   Tok.setKind(tok::annot_pragma_openmp);
-  Tok.setLocation(FirstTok.getLocation());
+  Tok.setLocation(Introducer.Loc);
 
   while (Tok.isNot(tok::eod) && Tok.isNot(tok::eof)) {
     Pragma.push_back(Tok);