[PowerPC] ELFv2 MC support for .abiversion directive

[oota-llvm.git] / lib / Target / PowerPC / PPCCTRLoops.cpp

diff --git a/lib/Target/PowerPC/PPCCTRLoops.cpp b/lib/Target/PowerPC/PPCCTRLoops.cpp
index a528eab3a659fa51d6baa674e0e2e5434161c8fd..ec1e34d91f93b8b158bcab990b6701d14d6b37d5 100644 (file)
--- a/lib/Target/PowerPC/PPCCTRLoops.cpp
+++ b/lib/Target/PowerPC/PPCCTRLoops.cpp
@@ -23,8 +23,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-#define DEBUG_TYPE "ctrloops"
-
 #include "llvm/Transforms/Scalar.h"
 #include "PPC.h"
 #include "PPCTargetMachine.h"
@@ -39,10 +37,10 @@
 #include "llvm/IR/Instructions.h"
 #include "llvm/IR/IntrinsicInst.h"
 #include "llvm/IR/Module.h"
+#include "llvm/IR/ValueHandle.h"
 #include "llvm/PassSupport.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Debug.h"
-#include "llvm/Support/ValueHandle.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Target/TargetLibraryInfo.h"
 #include "llvm/Transforms/Utils/BasicBlockUtils.h"
@@ -61,6 +59,8 @@
 
 using namespace llvm;
 
+#define DEBUG_TYPE "ctrloops"
+
 #ifndef NDEBUG
 static cl::opt<int> CTRLoopLimit("ppc-max-ctrloop", cl::Hidden, cl::init(-1));
 #endif
@@ -84,16 +84,16 @@ namespace {
   public:
     static char ID;
 
-    PPCCTRLoops() : FunctionPass(ID), TM(0) {
+    PPCCTRLoops() : FunctionPass(ID), TM(nullptr) {
       initializePPCCTRLoopsPass(*PassRegistry::getPassRegistry());
     }
     PPCCTRLoops(PPCTargetMachine &TM) : FunctionPass(ID), TM(&TM) {
       initializePPCCTRLoopsPass(*PassRegistry::getPassRegistry());
     }
 
-    virtual bool runOnFunction(Function &F);
+    bool runOnFunction(Function &F) override;
 
-    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
       AU.addRequired<LoopInfo>();
       AU.addPreserved<LoopInfo>();
       AU.addRequired<DominatorTreeWrapperPass>();
@@ -109,7 +109,7 @@ namespace {
     PPCTargetMachine *TM;
     LoopInfo *LI;
     ScalarEvolution *SE;
-    DataLayout *TD;
+    const DataLayout *DL;
     DominatorTree *DT;
     const TargetLibraryInfo *LibInfo;
   };
@@ -128,12 +128,12 @@ namespace {
       initializePPCCTRLoopsVerifyPass(*PassRegistry::getPassRegistry());
     }
 
-    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
       AU.addRequired<MachineDominatorTree>();
       MachineFunctionPass::getAnalysisUsage(AU);
     }
 
-    virtual bool runOnMachineFunction(MachineFunction &MF);
+    bool runOnMachineFunction(MachineFunction &MF) override;
 
   private:
     MachineDominatorTree *MDT;
@@ -171,7 +171,8 @@ bool PPCCTRLoops::runOnFunction(Function &F) {
   LI = &getAnalysis<LoopInfo>();
   SE = &getAnalysis<ScalarEvolution>();
   DT = &getAnalysis<DominatorTreeWrapperPass>().getDomTree();
-  TD = getAnalysisIfAvailable<DataLayout>();
+  DataLayoutPass *DLP = getAnalysisIfAvailable<DataLayoutPass>();
+  DL = DLP ? &DLP->getDataLayout() : nullptr;
   LibInfo = getAnalysisIfAvailable<TargetLibraryInfo>();
 
   bool MadeChange = false;
@@ -186,6 +187,13 @@ bool PPCCTRLoops::runOnFunction(Function &F) {
   return MadeChange;
 }
 
+static bool isLargeIntegerTy(bool Is32Bit, Type *Ty) {
+  if (IntegerType *ITy = dyn_cast<IntegerType>(Ty))
+    return ITy->getBitWidth() > (Is32Bit ? 32U : 64U);
+
+  return false;
+}
+
 bool PPCCTRLoops::mightUseCTR(const Triple &TT, BasicBlock *BB) {
   for (BasicBlock::iterator J = BB->begin(), JE = BB->end();
        J != JE; ++J) {
@@ -352,18 +360,24 @@ bool PPCCTRLoops::mightUseCTR(const Triple &TT, BasicBlock *BB) {
       CastInst *CI = cast<CastInst>(J);
       if (CI->getSrcTy()->getScalarType()->isPPC_FP128Ty() ||
           CI->getDestTy()->getScalarType()->isPPC_FP128Ty() ||
-          (TT.isArch32Bit() &&
-           (CI->getSrcTy()->getScalarType()->isIntegerTy(64) ||
-            CI->getDestTy()->getScalarType()->isIntegerTy(64))
-          ))
+          isLargeIntegerTy(TT.isArch32Bit(), CI->getSrcTy()->getScalarType()) ||
+          isLargeIntegerTy(TT.isArch32Bit(), CI->getDestTy()->getScalarType()))
         return true;
-    } else if (TT.isArch32Bit() &&
-               J->getType()->getScalarType()->isIntegerTy(64) &&
+    } else if (isLargeIntegerTy(TT.isArch32Bit(),
+                                J->getType()->getScalarType()) &&
                (J->getOpcode() == Instruction::UDiv ||
                 J->getOpcode() == Instruction::SDiv ||
                 J->getOpcode() == Instruction::URem ||
                 J->getOpcode() == Instruction::SRem)) {
       return true;
+    } else if (TT.isArch32Bit() &&
+               isLargeIntegerTy(false, J->getType()->getScalarType()) &&
+               (J->getOpcode() == Instruction::Shl ||
+                J->getOpcode() == Instruction::AShr ||
+                J->getOpcode() == Instruction::LShr)) {
+      // Only on PPC32, for 128-bit integers (specifically not 64-bit
+      // integers), these might be runtime calls.
+      return true;
     } else if (isa<IndirectBrInst>(J) || isa<InvokeInst>(J)) {
       // On PowerPC, indirect jumps use the counter register.
       return true;
@@ -418,9 +432,9 @@ bool PPCCTRLoops::convertToCTRLoop(Loop *L) {
   SmallVector<BasicBlock*, 4> ExitingBlocks;
   L->getExitingBlocks(ExitingBlocks);
 
-  BasicBlock *CountedExitBlock = 0;
-  const SCEV *ExitCount = 0;
-  BranchInst *CountedExitBranch = 0;
+  BasicBlock *CountedExitBlock = nullptr;
+  const SCEV *ExitCount = nullptr;
+  BranchInst *CountedExitBranch = nullptr;
   for (SmallVectorImpl<BasicBlock *>::iterator I = ExitingBlocks.begin(),
        IE = ExitingBlocks.end(); I != IE; ++I) {
     const SCEV *EC = SE->getExitCount(L, *I);