Matthias Braun 1bb228f703 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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@279564 91177308-0d34-0410-b5e6-96231b3b80d8

2016-08-23 20:58:29 +00:00

..

CMakeLists.txt

[CMake] Produce an empty library for GlobalISel when not building it.

2016-02-11 19:18:27 +00:00

llc.cpp

CodeGen: Remove MachineFunctionAnalysis => Enable (Machine)ModulePasses

2016-08-23 20:58:29 +00:00

LLVMBuild.txt

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