Revert "Revert "[misched] Extend scheduler to handle unsupported features""

This reverts commit r273565.

This was an over-eager revert.

llvm-svn: 273658

1 files changed, 8 insertions, 0 deletions

diff --git a/llvm/utils/TableGen/CodeGenSchedule.h b/llvm/utils/TableGen/CodeGenSchedule.h
index 7a236ad0dd8..755ffd25b0c 100644
--- a/llvm/utils/TableGen/CodeGenSchedule.h
+++ b/llvm/utils/TableGen/CodeGenSchedule.h
@@ -189,6 +189,10 @@ struct CodeGenProcModel {
   // This list is empty if no ItinRW refers to this Processor.
   RecVec ItinRWDefs;
 
+  // List of unsupported feature.
+  // This list is empty if the Processor has no UnsupportedFeatures.
+  RecVec UnsupportedFeaturesDefs;
+
   // All read/write resources associated with this processor.
   RecVec WriteResDefs;
   RecVec ReadAdvanceDefs;
@@ -211,6 +215,8 @@ struct CodeGenProcModel {
 
   unsigned getProcResourceIdx(Record *PRDef) const;
 
+  bool isUnsupported(const CodeGenInstruction &Inst) const;
+
 #ifndef NDEBUG
   void dump() const;
 #endif
@@ -402,6 +408,8 @@ private:
 
   void collectProcItinRW();
 
+  void collectProcUnsupportedFeatures();
+
   void inferSchedClasses();
 
   void checkCompleteness();