[llvm-mca] Move the AssembleInput logic into its own class.

Summary:
This patch introduces a CodeRegionGenerator class which is responsible for parsing some type of input and creating a 'CodeRegions' instance for use by llvm-mca.  In the future, we will also have a CodeRegionGenerator subclass for converting an input object file into CodeRegions.  For now, we only have the subclass for converting input assembly into CodeRegions.

This is mostly a NFC patch, as the logic remains close to the original, but now encapsulated in its own class and moved outside of llvm-mca.cpp.

Reviewers: andreadb, courbet, RKSimon

Reviewed By: andreadb

Subscribers: mgorny, tschuett, gbedwell, llvm-commits

Differential Revision: https://reviews.llvm.org/D54179

llvm-svn: 346344

1 files changed, 1 insertions, 0 deletions

diff --git a/llvm/tools/llvm-mca/CodeRegion.h b/llvm/tools/llvm-mca/CodeRegion.h
index 6ca2bd15128..867aa18bb4f 100644
--- a/llvm/tools/llvm-mca/CodeRegion.h
+++ b/llvm/tools/llvm-mca/CodeRegion.h
@@ -106,6 +106,7 @@ public:
   void beginRegion(llvm::StringRef Description, llvm::SMLoc Loc);
   void endRegion(llvm::SMLoc Loc);
   void addInstruction(const llvm::MCInst &Instruction);
+  llvm::SourceMgr &getSourceMgr() const { return SM; }
 
   CodeRegions(llvm::SourceMgr &S) : SM(S) {
     // Create a default region for the input code sequence.