From ff40d5e6d4de593f325cac261cf58109cca8239f Mon Sep 17 00:00:00 2001
From: Hal Finkel <hfinkel@anl.gov>
Date: Mon, 2 Dec 2013 23:52:46 +0000
Subject: [PATCH] Remove PPCScoreboardHazardRecognizer

PPCScoreboardHazardRecognizer was a subclass of ScoreboardHazardRecognizer
which did only one thing: filtered out nodes in EmitInstruction for which
DAG->getInstrDesc(SU) returned NULL. This used to be the case for PPC pseudo
instructions. As far as I can tell, this is no longer true, and so we can use
ScoreboardHazardRecognizer directly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196171 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/PowerPC/PPCHazardRecognizers.cpp | 24 ---------------------
 lib/Target/PowerPC/PPCHazardRecognizers.h   | 15 -------------
 lib/Target/PowerPC/PPCInstrInfo.cpp         |  4 ++--
 3 files changed, 2 insertions(+), 41 deletions(-)

diff --git a/lib/Target/PowerPC/PPCHazardRecognizers.cpp b/lib/Target/PowerPC/PPCHazardRecognizers.cpp
index 0df50e17dd9..b2d7ca11a2d 100644
--- a/lib/Target/PowerPC/PPCHazardRecognizers.cpp
+++ b/lib/Target/PowerPC/PPCHazardRecognizers.cpp
@@ -21,30 +21,6 @@
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 
-//===----------------------------------------------------------------------===//
-// PowerPC Scoreboard Hazard Recognizer
-void PPCScoreboardHazardRecognizer::EmitInstruction(SUnit *SU) {
-  const MCInstrDesc *MCID = DAG->getInstrDesc(SU);
-  if (!MCID)
-    // This is a PPC pseudo-instruction.
-    return;
-
-  ScoreboardHazardRecognizer::EmitInstruction(SU);
-}
-
-ScheduleHazardRecognizer::HazardType
-PPCScoreboardHazardRecognizer::getHazardType(SUnit *SU, int Stalls) {
-  return ScoreboardHazardRecognizer::getHazardType(SU, Stalls);
-}
-
-void PPCScoreboardHazardRecognizer::AdvanceCycle() {
-  ScoreboardHazardRecognizer::AdvanceCycle();
-}
-
-void PPCScoreboardHazardRecognizer::Reset() {
-  ScoreboardHazardRecognizer::Reset();
-}
-
 //===----------------------------------------------------------------------===//
 // PowerPC 970 Hazard Recognizer
 //
diff --git a/lib/Target/PowerPC/PPCHazardRecognizers.h b/lib/Target/PowerPC/PPCHazardRecognizers.h
index 84b8e6de457..9ee042b63e1 100644
--- a/lib/Target/PowerPC/PPCHazardRecognizers.h
+++ b/lib/Target/PowerPC/PPCHazardRecognizers.h
@@ -21,21 +21,6 @@
 
 namespace llvm {
 
-/// PPCScoreboardHazardRecognizer - This class implements a scoreboard-based
-/// hazard recognizer for generic PPC processors.
-class PPCScoreboardHazardRecognizer : public ScoreboardHazardRecognizer {
-  const ScheduleDAG *DAG;
-public:
-  PPCScoreboardHazardRecognizer(const InstrItineraryData *ItinData,
-                         const ScheduleDAG *DAG_) :
-    ScoreboardHazardRecognizer(ItinData, DAG_), DAG(DAG_) {}
-
-  virtual HazardType getHazardType(SUnit *SU, int Stalls);
-  virtual void EmitInstruction(SUnit *SU);
-  virtual void AdvanceCycle();
-  virtual void Reset();
-};
-
 /// PPCHazardRecognizer970 - This class defines a finite state automata that
 /// models the dispatch logic on the PowerPC 970 (aka G5) processor.  This
 /// promotes good dispatch group formation and implements noop insertion to
diff --git a/lib/Target/PowerPC/PPCInstrInfo.cpp b/lib/Target/PowerPC/PPCInstrInfo.cpp
index 87e13ef9eb1..bdeb649d220 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.cpp
+++ b/lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -61,7 +61,7 @@ ScheduleHazardRecognizer *PPCInstrInfo::CreateTargetHazardRecognizer(
   if (Directive == PPC::DIR_440 || Directive == PPC::DIR_A2 ||
       Directive == PPC::DIR_E500mc || Directive == PPC::DIR_E5500) {
     const InstrItineraryData *II = TM->getInstrItineraryData();
-    return new PPCScoreboardHazardRecognizer(II, DAG);
+    return new ScoreboardHazardRecognizer(II, DAG);
   }
 
   return TargetInstrInfo::CreateTargetHazardRecognizer(TM, DAG);
@@ -82,7 +82,7 @@ ScheduleHazardRecognizer *PPCInstrInfo::CreateTargetPostRAHazardRecognizer(
     return new PPCHazardRecognizer970(TM);
   }
 
-  return new PPCScoreboardHazardRecognizer(II, DAG);
+  return new ScoreboardHazardRecognizer(II, DAG);
 }
 
 // Detect 32 -> 64-bit extensions where we may reuse the low sub-register.