From e4b4edd72ae596ac8d1fdbc6e77f61e331f6775d Mon Sep 17 00:00:00 2001
From: Chandler Carruth <chandlerc@gmail.com>
Date: Sat, 5 Jan 2013 12:32:17 +0000
Subject: [PATCH] Funnel the actual TargetTransformInfo pass from the
 SelectionDAGISel pass into the SelectionDAG itself rather than snooping on
 the implementation of that pass as exposed by the TargetMachine. This removes
 the last direct client of the ScalarTargetTransformInfo class outside of the
 TTI pass implementation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171625 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/CodeGen/SelectionDAG.h           |  5 ++++-
 include/llvm/CodeGen/SelectionDAGISel.h       |  2 ++
 lib/CodeGen/SelectionDAG/SelectionDAG.cpp     | 10 ++++++----
 lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp |  4 +++-
 4 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/include/llvm/CodeGen/SelectionDAG.h b/include/llvm/CodeGen/SelectionDAG.h
index 431c67963f7..c5cc8f58130 100644
--- a/include/llvm/CodeGen/SelectionDAG.h
+++ b/include/llvm/CodeGen/SelectionDAG.h
@@ -37,6 +37,7 @@ class SDNodeOrdering;
 class SDDbgValue;
 class TargetLowering;
 class TargetSelectionDAGInfo;
+class TargetTransformInfo;
 
 template<> struct ilist_traits<SDNode> : public ilist_default_traits<SDNode> {
 private:
@@ -131,6 +132,7 @@ class SelectionDAG {
   const TargetMachine &TM;
   const TargetLowering &TLI;
   const TargetSelectionDAGInfo &TSI;
+  const TargetTransformInfo *TTI;
   MachineFunction *MF;
   LLVMContext *Context;
   CodeGenOpt::Level OptLevel;
@@ -226,7 +228,7 @@ public:
   /// init - Prepare this SelectionDAG to process code in the given
   /// MachineFunction.
   ///
-  void init(MachineFunction &mf);
+  void init(MachineFunction &mf, const TargetTransformInfo *TTI);
 
   /// clear - Clear state and free memory necessary to make this
   /// SelectionDAG ready to process a new block.
@@ -237,6 +239,7 @@ public:
   const TargetMachine &getTarget() const { return TM; }
   const TargetLowering &getTargetLoweringInfo() const { return TLI; }
   const TargetSelectionDAGInfo &getSelectionDAGInfo() const { return TSI; }
+  const TargetTransformInfo *getTargetTransformInfo() const { return TTI; }
   LLVMContext *getContext() const {return Context; }
 
   /// viewGraph - Pop up a GraphViz/gv window with the DAG rendered using 'dot'.
diff --git a/include/llvm/CodeGen/SelectionDAGISel.h b/include/llvm/CodeGen/SelectionDAGISel.h
index 782118f31b3..16aacc0f60b 100644
--- a/include/llvm/CodeGen/SelectionDAGISel.h
+++ b/include/llvm/CodeGen/SelectionDAGISel.h
@@ -31,6 +31,7 @@ namespace llvm {
   class TargetLowering;
   class TargetLibraryInfo;
   class TargetInstrInfo;
+  class TargetTransformInfo;
   class FunctionLoweringInfo;
   class ScheduleHazardRecognizer;
   class GCFunctionInfo;
@@ -44,6 +45,7 @@ public:
   const TargetMachine &TM;
   const TargetLowering &TLI;
   const TargetLibraryInfo *LibInfo;
+  const TargetTransformInfo *TTI;
   FunctionLoweringInfo *FuncInfo;
   MachineFunction *MF;
   MachineRegisterInfo *RegInfo;
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index 35ceef4cf4b..4cfb212eaf9 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -885,15 +885,17 @@ unsigned SelectionDAG::getEVTAlignment(EVT VT) const {
 // EntryNode could meaningfully have debug info if we can find it...
 SelectionDAG::SelectionDAG(const TargetMachine &tm, CodeGenOpt::Level OL)
   : TM(tm), TLI(*tm.getTargetLowering()), TSI(*tm.getSelectionDAGInfo()),
-    OptLevel(OL), EntryNode(ISD::EntryToken, DebugLoc(), getVTList(MVT::Other)),
+    TTI(0), OptLevel(OL), EntryNode(ISD::EntryToken, DebugLoc(),
+                                    getVTList(MVT::Other)),
     Root(getEntryNode()), Ordering(0), UpdateListeners(0) {
   AllNodes.push_back(&EntryNode);
   Ordering = new SDNodeOrdering();
   DbgInfo = new SDDbgInfo();
 }
 
-void SelectionDAG::init(MachineFunction &mf) {
+void SelectionDAG::init(MachineFunction &mf, const TargetTransformInfo *tti) {
   MF = &mf;
+  TTI = tti;
   Context = &mf.getFunction()->getContext();
 }
 
@@ -3386,8 +3388,8 @@ static SDValue getMemsetStringVal(EVT VT, DebugLoc dl, SelectionDAG &DAG,
 
   // If the "cost" of materializing the integer immediate is 1 or free, then
   // it is cost effective to turn the load into the immediate.
-  if (DAG.getTarget().getScalarTargetTransformInfo()->
-      getIntImmCost(Val, VT.getTypeForEVT(*DAG.getContext())) < 2)
+  const TargetTransformInfo *TTI = DAG.getTargetTransformInfo();
+  if (TTI->getIntImmCost(Val, VT.getTypeForEVT(*DAG.getContext())) < 2)
     return DAG.getConstant(Val, VT);
   return SDValue(0, 0);
 }
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index 990e8036d30..2f54fa0e62c 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -53,6 +53,7 @@
 #include "llvm/Target/TargetOptions.h"
 #include "llvm/Target/TargetRegisterInfo.h"
 #include "llvm/Target/TargetSubtargetInfo.h"
+#include "llvm/TargetTransformInfo.h"
 #include "llvm/Transforms/Utils/BasicBlockUtils.h"
 #include <algorithm>
 using namespace llvm;
@@ -350,13 +351,14 @@ bool SelectionDAGISel::runOnMachineFunction(MachineFunction &mf) {
   RegInfo = &MF->getRegInfo();
   AA = &getAnalysis<AliasAnalysis>();
   LibInfo = &getAnalysis<TargetLibraryInfo>();
+  TTI = getAnalysisIfAvailable<TargetTransformInfo>();
   GFI = Fn.hasGC() ? &getAnalysis<GCModuleInfo>().getFunctionInfo(Fn) : 0;
 
   DEBUG(dbgs() << "\n\n\n=== " << Fn.getName() << "\n");
 
   SplitCriticalSideEffectEdges(const_cast<Function&>(Fn), this);
 
-  CurDAG->init(*MF);
+  CurDAG->init(*MF, TTI);
   FuncInfo->set(Fn, *MF);
 
   if (UseMBPI && OptLevel != CodeGenOpt::None)
-- 
2.34.1