From bf991c018d86f96f1a7062115adc4130b6f2ae79 Mon Sep 17 00:00:00 2001
From: Vincent Lejeune <vljn@ovi.com>
Date: Fri, 17 May 2013 16:49:55 +0000
Subject: [PATCH] R600: Factorize Fetch size limit inside AMDGPUSubTarget

llvm-svn: 182122
---
 lib/Target/R600/AMDGPUSubtarget.cpp          |  5 +++++
 lib/Target/R600/AMDGPUSubtarget.h            |  2 ++
 lib/Target/R600/R600ControlFlowFinalizer.cpp |  7 ++-----
 lib/Target/R600/R600MachineScheduler.cpp     | 12 ++++--------
 4 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/lib/Target/R600/AMDGPUSubtarget.cpp b/lib/Target/R600/AMDGPUSubtarget.cpp
index a7e1d7b6d54..6bfe17bbae9 100644
--- a/lib/Target/R600/AMDGPUSubtarget.cpp
+++ b/lib/Target/R600/AMDGPUSubtarget.cpp
@@ -37,6 +37,7 @@ AMDGPUSubtarget::AMDGPUSubtarget(StringRef TT, StringRef CPU, StringRef FS) :
   ParseSubtargetFeatures(GPU, FS);
   DevName = GPU;
   Device = AMDGPUDeviceInfo::getDeviceFromName(DevName, this, Is64bit);
+  TexVTXClauseSize = (Device->getGeneration() >= AMDGPUDeviceInfo::HD4XXX)?16:8;
 }
 
 AMDGPUSubtarget::~AMDGPUSubtarget() {
@@ -57,6 +58,10 @@ bool
 AMDGPUSubtarget::hasVertexCache() const {
   return HasVertexCache;
 }
+short
+AMDGPUSubtarget::getTexVTXClauseSize() const {
+  return TexVTXClauseSize;
+}
 bool
 AMDGPUSubtarget::isTargetELF() const {
   return false;
diff --git a/lib/Target/R600/AMDGPUSubtarget.h b/lib/Target/R600/AMDGPUSubtarget.h
index b6501a45628..b9531bdcf57 100644
--- a/lib/Target/R600/AMDGPUSubtarget.h
+++ b/lib/Target/R600/AMDGPUSubtarget.h
@@ -37,6 +37,7 @@ private:
   bool DumpCode;
   bool R600ALUInst;
   bool HasVertexCache;
+  short TexVTXClauseSize;
 
   InstrItineraryData InstrItins;
 
@@ -50,6 +51,7 @@ public:
   bool isOverride(AMDGPUDeviceInfo::Caps) const;
   bool is64bit() const;
   bool hasVertexCache() const;
+  short getTexVTXClauseSize() const;
 
   // Helper functions to simplify if statements
   bool isTargetELF() const;
diff --git a/lib/Target/R600/R600ControlFlowFinalizer.cpp b/lib/Target/R600/R600ControlFlowFinalizer.cpp
index cdda3dab8da..f1e07326e27 100644
--- a/lib/Target/R600/R600ControlFlowFinalizer.cpp
+++ b/lib/Target/R600/R600ControlFlowFinalizer.cpp
@@ -148,7 +148,7 @@ private:
     for (MachineBasicBlock::iterator E = MBB.end(); I != E; ++I) {
       if (IsTrivialInst(I))
         continue;
-      if (AluInstCount > MaxFetchInst)
+      if (AluInstCount >= MaxFetchInst)
         break;
       if ((IsTex && !TII->usesTextureCache(I)) ||
           (!IsTex && !TII->usesVertexCache(I)))
@@ -316,10 +316,7 @@ public:
     TRI(TII->getRegisterInfo()),
     ST(tm.getSubtarget<AMDGPUSubtarget>()) {
       const AMDGPUSubtarget &ST = tm.getSubtarget<AMDGPUSubtarget>();
-      if (ST.device()->getGeneration() <= AMDGPUDeviceInfo::HD4XXX)
-        MaxFetchInst = 8;
-      else
-        MaxFetchInst = 16;
+      MaxFetchInst = ST.getTexVTXClauseSize();
   }
 
   virtual bool runOnMachineFunction(MachineFunction &MF) {
diff --git a/lib/Target/R600/R600MachineScheduler.cpp b/lib/Target/R600/R600MachineScheduler.cpp
index a777142a9e7..c6709a8dc38 100644
--- a/lib/Target/R600/R600MachineScheduler.cpp
+++ b/lib/Target/R600/R600MachineScheduler.cpp
@@ -41,11 +41,7 @@ void R600SchedStrategy::initialize(ScheduleDAGMI *dag) {
 
 
   const AMDGPUSubtarget &ST = DAG->TM.getSubtarget<AMDGPUSubtarget>();
-  if (ST.device()->getGeneration() <= AMDGPUDeviceInfo::HD5XXX) {
-    InstKindLimit[IDFetch] = 7; // 8 minus 1 for security
-  } else {
-    InstKindLimit[IDFetch] = 15; // 16 minus 1 for security
-  }
+  InstKindLimit[IDFetch] = ST.getTexVTXClauseSize();
 }
 
 void R600SchedStrategy::MoveUnits(ReadyQueue *QSrc, ReadyQueue *QDst)
@@ -67,9 +63,9 @@ SUnit* R600SchedStrategy::pickNode(bool &IsTopNode) {
 
   // check if we might want to switch current clause type
   bool AllowSwitchToAlu = (CurInstKind == IDOther) ||
-      (CurEmitted > InstKindLimit[CurInstKind]) ||
+      (CurEmitted >= InstKindLimit[CurInstKind]) ||
       (Available[CurInstKind]->empty());
-  bool AllowSwitchFromAlu = (CurEmitted > InstKindLimit[CurInstKind]) &&
+  bool AllowSwitchFromAlu = (CurEmitted >= InstKindLimit[CurInstKind]) &&
       (!Available[IDFetch]->empty() || !Available[IDOther]->empty());
 
   if ((AllowSwitchToAlu && CurInstKind != IDAlu) ||
@@ -77,7 +73,7 @@ SUnit* R600SchedStrategy::pickNode(bool &IsTopNode) {
     // try to pick ALU
     SU = pickAlu();
     if (SU) {
-      if (CurEmitted >  InstKindLimit[IDAlu])
+      if (CurEmitted >= InstKindLimit[IDAlu])
         CurEmitted = 0;
       NextInstKind = IDAlu;
     }