[Support] Reapply r245289 "Always wait for GraphViz before opening the viewer"

The change was accidentally undone by r245290.

Original log message:
When calling DisplayGraph and a PS viewer is chosen, two programs are executed: The GraphViz generator and the PostScript viewer. Always wait for the generator to finish to ensure that the .ps file is written before opening the viewer for that file. DisplayGraph's wait parameter refers to whether to wait until the user closes the viewer.

This happened on Windows and if none of the options to open the .dot file directly applies, also on Linux.

Differential Revision: http://reviews.llvm.org/D11876

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@247980 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Support/GraphWriter.cpp b/lib/Support/GraphWriter.cpp
index b80fbdb0d0818dd6b5a70019b73dd943d3b69ea2..d0e1d50e8ccbc1388d421f1120c68af8cbda4f4e 100644 (file)
--- a/lib/Support/GraphWriter.cpp
+++ b/lib/Support/GraphWriter.cpp
@@ -234,7 +234,7 @@ bool llvm::DisplayGraph(StringRef FilenameRef, bool wait,
 
     errs() << "Running '" << GeneratorPath << "' program... ";
 
-    if (ExecGraphViewer(GeneratorPath, args, Filename, wait, ErrMsg))
+    if (ExecGraphViewer(GeneratorPath, args, Filename, true, ErrMsg))
       return true;
 
     // The lifetime of StartArg must include the call of ExecGraphViewer