[ORC] Add a method to JITTargetMachineBuilder to get the default data layout

for the target machine.

This simplifies usage during setup of concurrent JIT stacks where the client
needs a DataLayout, but not a TargetMachine (TargetMachines are created on
the fly by the compile threads later).

llvm-svn: 343429

1 files changed, 1 insertions, 6 deletions

diff --git a/llvm/tools/lli/lli.cpp b/llvm/tools/lli/lli.cpp
index 9b3c7478b41..b23733eac99 100644
--- a/llvm/tools/lli/lli.cpp
+++ b/llvm/tools/lli/lli.cpp
@@ -786,12 +786,7 @@ int runOrcLazyJIT(const char *ProgName) {
                         ? Optional<CodeModel::Model>(CMModel)
                         : None);
 
-  DataLayout DL("");
-  {
-    // Create a throwaway TargetMachine to get the data layout.
-    auto TM = ExitOnErr(JTMB.createTargetMachine());
-    DL = TM->createDataLayout();
-  }
+  DataLayout DL = ExitOnErr(JTMB.getDefaultDataLayoutForTarget());
   auto J = ExitOnErr(orc::LLLazyJIT::Create(std::move(JTMB), DL, LazyJITCompileThreads));
 
   if (PerModuleLazy)