Allow target to specify regclass for which antideps will only be broken along the critical path.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88682 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 3 deletions

diff --git a/include/llvm/Target/TargetSubtarget.h b/include/llvm/Target/TargetSubtarget.h
index f16c9e4..22b09ba 100644
--- a/include/llvm/Target/TargetSubtarget.h
+++ b/include/llvm/Target/TargetSubtarget.h
@@ -38,7 +38,7 @@ public:
   // AntiDepBreakMode - Type of anti-dependence breaking that should
   // be performed before post-RA scheduling.
   typedef enum { ANTIDEP_NONE, ANTIDEP_CRITICAL, ANTIDEP_ALL } AntiDepBreakMode;
-  typedef SmallVectorImpl<TargetRegisterClass*> ExcludedRCVector;
+  typedef SmallVectorImpl<TargetRegisterClass*> RegClassVector;
 
   virtual ~TargetSubtarget();
 
@@ -50,10 +50,12 @@ public:
 
   // enablePostRAScheduler - If the target can benefit from post-regalloc
   // scheduling and the specified optimization level meets the requirement
-  // return true to enable post-register-allocation scheduling. 
+  // return true to enable post-register-allocation scheduling. In
+  // CriticalPathRCs return any register classes that should only be broken
+  // if on the critical path. 
   virtual bool enablePostRAScheduler(CodeGenOpt::Level OptLevel,
                                      AntiDepBreakMode& Mode,
-                                     ExcludedRCVector& ExcludedRCs) const;
+                                     RegClassVector& CriticalPathRCs) const;
   // adjustSchedDependency - Perform target specific adjustments to
   // the latency of a schedule dependency.
   virtual void adjustSchedDependency(SUnit *def, SUnit *use,