Improve TargetPassConfig. No intended functionality.

Split CodeGen into stages.
Distinguish between optimization and correctness.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150122 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 13 insertions, 0 deletions

diff --git a/include/llvm/CodeGen/Passes.h b/include/llvm/CodeGen/Passes.h
index 3afb6a7b67..f2deadb486 100644
--- a/include/llvm/CodeGen/Passes.h
+++ b/include/llvm/CodeGen/Passes.h
@@ -111,6 +111,10 @@ protected:
     return true;
   }
 
+  /// addMachineSSAOptimization - Add standard passes that optimize machine
+  /// instructions in SSA form.
+  virtual void addMachineSSAOptimization();
+
   /// addPreRegAlloc - This method may be implemented by targets that want to
   /// run passes immediately before register allocation. This should return
   /// true if -print-machineinstrs should print after these passes.
@@ -118,6 +122,9 @@ protected:
     return false;
   }
 
+  // addRegAlloc - Add standard passes related to register allocation.
+  virtual void addRegAlloc();
+
   /// addPostRegAlloc - This method may be implemented by targets that want
   /// to run passes after register allocation but before prolog-epilog
   /// insertion.  This should return true if -print-machineinstrs should print
@@ -126,6 +133,9 @@ protected:
     return false;
   }
 
+  /// Add passes that optimize machine instructions after register allocation.
+  virtual void addMachineLateOptimization();
+
   /// addPreSched2 - This method may be implemented by targets that want to
   /// run passes after prolog-epilog insertion and before the second instruction
   /// scheduling pass.  This should return true if -print-machineinstrs should
@@ -134,6 +144,9 @@ protected:
     return false;
   }
 
+  /// Add standard basic block placement passes.
+  virtual void addBlockPlacement();
+
   /// addPreEmitPass - This pass may be implemented by targets that want to run
   /// passes immediately before machine code is emitted.  This should return
   /// true if -print-machineinstrs should print out the code after the passes.