CodeGen: Remove MachineFunctionAnalysis => Enable (Machine)ModulePasses

Re-apply this commit with the deletion of a MachineFunction delegated to
a separate pass to avoid use after free when doing this directly in
AsmPrinter.

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: 279564

1 files changed, 0 insertions, 1 deletions

diff --git a/llvm/lib/Target/Hexagon/HexagonNewValueJump.cpp b/llvm/lib/Target/Hexagon/HexagonNewValueJump.cpp
index f622dad3073..14f324628f1 100644
--- a/llvm/lib/Target/Hexagon/HexagonNewValueJump.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonNewValueJump.cpp
@@ -29,7 +29,6 @@
 #include "HexagonTargetMachine.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/CodeGen/LiveVariables.h"
-#include "llvm/CodeGen/MachineFunctionAnalysis.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
 #include "llvm/CodeGen/MachineInstrBuilder.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"