Remove "localize global" optimization

[oota-llvm.git] / lib / CodeGen / IfConversion.cpp

diff --git a/lib/CodeGen/IfConversion.cpp b/lib/CodeGen/IfConversion.cpp
index 1ae7e3b5ca63f993cd58252781088ac58025443e..597a237148a54aa2cbe74987cea0062d6981bd91 100644 (file)
--- a/lib/CodeGen/IfConversion.cpp
+++ b/lib/CodeGen/IfConversion.cpp
@@ -22,6 +22,7 @@
 #include "llvm/CodeGen/MachineInstrBuilder.h"
 #include "llvm/CodeGen/MachineModuleInfo.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/CodeGen/TargetSchedule.h"
 #include "llvm/MC/MCInstrItineraries.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Debug.h"
@@ -31,6 +32,8 @@
 #include "llvm/Target/TargetLowering.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Target/TargetRegisterInfo.h"
+#include "llvm/Target/TargetSubtargetInfo.h"
+
 using namespace llvm;
 
 // Hidden options for help debugging.
@@ -150,11 +153,11 @@ namespace {
     /// BBAnalysis - Results of if-conversion feasibility analysis indexed by
     /// basic block number.
     std::vector<BBInfo> BBAnalysis;
+    TargetSchedModel SchedModel;
 
     const TargetLoweringBase *TLI;
     const TargetInstrInfo *TII;
     const TargetRegisterInfo *TRI;
-    const InstrItineraryData *InstrItins;
     const MachineBranchProbabilityInfo *MBPI;
     MachineRegisterInfo *MRI;
 
@@ -267,7 +270,11 @@ bool IfConverter::runOnMachineFunction(MachineFunction &MF) {
   TRI = MF.getTarget().getRegisterInfo();
   MBPI = &getAnalysis<MachineBranchProbabilityInfo>();
   MRI = &MF.getRegInfo();
-  InstrItins = MF.getTarget().getInstrItineraryData();
+
+  const TargetSubtargetInfo &ST =
+    MF.getTarget().getSubtarget<TargetSubtargetInfo>();
+  SchedModel.init(*ST.getSchedModel(), &ST, TII);
+
   if (!TII) return false;
 
   PreRegAlloc = MRI->isSSA();
@@ -666,32 +673,28 @@ void IfConverter::ScanInstructions(BBInfo &BBI) {
     bool isPredicated = TII->isPredicated(I);
     bool isCondBr = BBI.IsBrAnalyzable && I->isConditionalBranch();
 
-    if (!isCondBr) {
-      if (!isPredicated) {
-        BBI.NonPredSize++;
-        unsigned ExtraPredCost = 0;
-        unsigned NumCycles = TII->getInstrLatency(InstrItins, &*I,
-                                                  &ExtraPredCost);
-        if (NumCycles > 1)
-          BBI.ExtraCost += NumCycles-1;
-        BBI.ExtraCost2 += ExtraPredCost;
-      } else if (!AlreadyPredicated) {
-        // FIXME: This instruction is already predicated before the
-        // if-conversion pass. It's probably something like a conditional move.
-        // Mark this block unpredicable for now.
-        BBI.IsUnpredicable = true;
-        return;
-      }
+    // A conditional branch is not predicable, but it may be eliminated.
+    if (isCondBr)
+      continue;
+
+    if (!isPredicated) {
+      BBI.NonPredSize++;
+      unsigned ExtraPredCost = TII->getPredicationCost(&*I);
+      unsigned NumCycles = SchedModel.computeInstrLatency(&*I, false);
+      if (NumCycles > 1)
+        BBI.ExtraCost += NumCycles-1;
+      BBI.ExtraCost2 += ExtraPredCost;
+    } else if (!AlreadyPredicated) {
+      // FIXME: This instruction is already predicated before the
+      // if-conversion pass. It's probably something like a conditional move.
+      // Mark this block unpredicable for now.
+      BBI.IsUnpredicable = true;
+      return;
     }
 
     if (BBI.ClobbersPred && !isPredicated) {
       // Predicate modification instruction should end the block (except for
       // already predicated instructions and end of block branches).
-      if (isCondBr) {
-        // A conditional branch is not predicable, but it may be eliminated.
-        continue;
-      }
-
       // Predicate may have been modified, the subsequent (currently)
       // unpredicated instructions cannot be correctly predicated.
       BBI.IsUnpredicable = true;
@@ -1514,8 +1517,8 @@ void IfConverter::CopyAndPredicateBlock(BBInfo &ToBBI, BBInfo &FromBBI,
     MachineInstr *MI = MF.CloneMachineInstr(I);
     ToBBI.BB->insert(ToBBI.BB->end(), MI);
     ToBBI.NonPredSize++;
-    unsigned ExtraPredCost = 0;
-    unsigned NumCycles = TII->getInstrLatency(InstrItins, &*I, &ExtraPredCost);
+    unsigned ExtraPredCost = TII->getPredicationCost(&*I);
+    unsigned NumCycles = SchedModel.computeInstrLatency(&*I, false);
     if (NumCycles > 1)
       ToBBI.ExtraCost += NumCycles-1;
     ToBBI.ExtraCost2 += ExtraPredCost;