CodeGen: Remove MachineFunctionAnalysis => Enable (Machine)ModulePasses

Re-apply this patch, hopefully I will get away without any warnings
in the constructor now.

This patch removes the MachineFunctionAnalysis. Instead we keep a
map from IR Function to MachineFunction in the MachineModuleInfo.

This allows the insertion of ModulePasses into the codegen pipeline
without breaking it because the MachineFunctionAnalysis gets dropped
before a module pass.

Peak memory should stay unchanged without a ModulePass in the codegen
pipeline: Previously the MachineFunction was freed at the end of a codegen
function pipeline because the MachineFunctionAnalysis was dropped; With
this patch the MachineFunction is freed after the AsmPrinter has
finished.

Differential Revision: http://reviews.llvm.org/D23736

llvm-svn: 279602

1 files changed, 3 insertions, 3 deletions

diff --git a/llvm/unittests/MI/LiveIntervalTest.cpp b/llvm/unittests/MI/LiveIntervalTest.cpp
index 9f594e5..1d6df97 100644
--- a/llvm/unittests/MI/LiveIntervalTest.cpp
+++ b/llvm/unittests/MI/LiveIntervalTest.cpp
@@ -69,9 +69,9 @@ std::unique_ptr<Module> parseMIR(LLVMContext &Context,
   if (!F)
     return nullptr;
 
-  PM.add(new MachineModuleInfo(&TM));
-  const LLVMTargetMachine &LLVMTM = static_cast<const LLVMTargetMachine&>(TM);
-  LLVMTM.addMachineFunctionAnalysis(PM, MIR.get());
+  MachineModuleInfo *MMI = new MachineModuleInfo(&TM);
+  MMI->setMachineFunctionInitializer(MIR.get());
+  PM.add(MMI);
 
   return M;
 }