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, 0 insertions, 2 deletions

diff --git a/llvm/lib/Target/Hexagon/HexagonGenExtract.cpp b/llvm/lib/Target/Hexagon/HexagonGenExtract.cpp
index f46b6d2a82e..ca10846653a 100644
--- a/llvm/lib/Target/Hexagon/HexagonGenExtract.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonGenExtract.cpp
@@ -8,7 +8,6 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/ADT/STLExtras.h"
-#include "llvm/CodeGen/MachineFunctionAnalysis.h"
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/Dominators.h"
 #include "llvm/IR/Function.h"
@@ -60,7 +59,6 @@ namespace {
     virtual void getAnalysisUsage(AnalysisUsage &AU) const override {
       AU.addRequired<DominatorTreeWrapperPass>();
       AU.addPreserved<DominatorTreeWrapperPass>();
-      AU.addPreserved<MachineFunctionAnalysis>();
       FunctionPass::getAnalysisUsage(AU);
     }
   private: