Remove the PreserveSource linker mode.

I noticed that it was untested, and forcing it on caused some tests to fail:

    LLVM :: Linker/metadata-a.ll
    LLVM :: Linker/prefixdata.ll
    LLVM :: Linker/type-unique-odr-a.ll
    LLVM :: Linker/type-unique-simple-a.ll
    LLVM :: Linker/type-unique-simple2-a.ll
    LLVM :: Linker/type-unique-simple2.ll
    LLVM :: Linker/type-unique-type-array-a.ll
    LLVM :: Linker/unnamed-addr1-a.ll
    LLVM :: Linker/visibility1.ll

If it is to be resurrected, it has to be fixed and we should probably have a
-preserve-source command line option in llvm-mc and run tests with and without
it.

llvm-svn: 220741

1 files changed, 4 insertions, 6 deletions

diff --git a/llvm/tools/bugpoint/Miscompilation.cpp b/llvm/tools/bugpoint/Miscompilation.cpp
index ce16d4d18af..8cb45838773 100644
--- a/llvm/tools/bugpoint/Miscompilation.cpp
+++ b/llvm/tools/bugpoint/Miscompilation.cpp
@@ -222,7 +222,7 @@ static Module *TestMergedProgram(const BugDriver &BD, Module *M1, Module *M2,
     M1 = CloneModule(M1);
     M2 = CloneModule(M2);
   }
-  if (Linker::LinkModules(M1, M2, Linker::DestroySource))
+  if (Linker::LinkModules(M1, M2))
     exit(1);
   delete M2;   // We are done with this module.
 
@@ -392,8 +392,7 @@ static bool ExtractLoops(BugDriver &BD,
                                                   F->getFunctionType()));
       }
 
-      if (Linker::LinkModules(ToNotOptimize, ToOptimizeLoopExtracted,
-                              Linker::DestroySource))
+      if (Linker::LinkModules(ToNotOptimize, ToOptimizeLoopExtracted))
         exit(1);
 
       MiscompiledFunctions.clear();
@@ -422,8 +421,7 @@ static bool ExtractLoops(BugDriver &BD,
     // extraction both didn't break the program, and didn't mask the problem.
     // Replace the current program with the loop extracted version, and try to
     // extract another loop.
-    if (Linker::LinkModules(ToNotOptimize, ToOptimizeLoopExtracted,
-                            Linker::DestroySource))
+    if (Linker::LinkModules(ToNotOptimize, ToOptimizeLoopExtracted))
       exit(1);
 
     delete ToOptimizeLoopExtracted;
@@ -601,7 +599,7 @@ static bool ExtractBlocks(BugDriver &BD,
       MisCompFunctions.push_back(std::make_pair(I->getName(),
                                                 I->getFunctionType()));
 
-  if (Linker::LinkModules(ProgClone, Extracted.get(), Linker::DestroySource))
+  if (Linker::LinkModules(ProgClone, Extracted.get()))
     exit(1);
 
   // Set the new program and delete the old one.