run the jump threading pass in llvm-ld also


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50027 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-ld/Optimize.cpp b/tools/llvm-ld/Optimize.cpp
index aff228d..5a22ea1 100644
--- a/tools/llvm-ld/Optimize.cpp
+++ b/tools/llvm-ld/Optimize.cpp
@@ -162,7 +162,7 @@
 
     // The IPO passes may leave cruft around.  Clean up after them.
     addPass(Passes, createInstructionCombiningPass());
-
+    addPass(Passes, createJumpThreadingPass());        // Thread jumps.
     addPass(Passes, createScalarReplAggregatesPass()); // Break up allocas
 
     // Run a few AA driven optimizations here and now, to cleanup the code.
@@ -176,6 +176,8 @@
     // Cleanup and simplify the code after the scalar optimizations.
     addPass(Passes, createInstructionCombiningPass());
 
+    addPass(Passes, createJumpThreadingPass());        // Thread jumps.
+
     // Delete basic blocks, which optimization passes may have killed...
     addPass(Passes, createCFGSimplificationPass());