#include "InstCombine.h"
#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/IR/DataLayout.h"
-#include "llvm/Support/PatternMatch.h"
+#include "llvm/IR/PatternMatch.h"
#include "llvm/Target/TargetLibraryInfo.h"
using namespace llvm;
using namespace PatternMatch;
+#define DEBUG_TYPE "instcombine"
+
/// DecomposeSimpleLinearExpr - Analyze 'Val', seeing if it is a simple linear
/// expression. If so, decompose it, returning some value X, such that Val is
/// X*Scale+Offset.
Instruction *InstCombiner::PromoteCastOfAllocation(BitCastInst &CI,
AllocaInst &AI) {
// This requires DataLayout to get the alloca alignment and size information.
- if (!TD) return 0;
+ if (!DL) return 0;
PointerType *PTy = cast<PointerType>(CI.getType());
Type *CastElTy = PTy->getElementType();
if (!AllocElTy->isSized() || !CastElTy->isSized()) return 0;
- unsigned AllocElTyAlign = TD->getABITypeAlignment(AllocElTy);
- unsigned CastElTyAlign = TD->getABITypeAlignment(CastElTy);
+ unsigned AllocElTyAlign = DL->getABITypeAlignment(AllocElTy);
+ unsigned CastElTyAlign = DL->getABITypeAlignment(CastElTy);
if (CastElTyAlign < AllocElTyAlign) return 0;
// If the allocation has multiple uses, only promote it if we are strictly
// same, we open the door to infinite loops of various kinds.
if (!AI.hasOneUse() && CastElTyAlign == AllocElTyAlign) return 0;
- uint64_t AllocElTySize = TD->getTypeAllocSize(AllocElTy);
- uint64_t CastElTySize = TD->getTypeAllocSize(CastElTy);
+ uint64_t AllocElTySize = DL->getTypeAllocSize(AllocElTy);
+ uint64_t CastElTySize = DL->getTypeAllocSize(CastElTy);
if (CastElTySize == 0 || AllocElTySize == 0) return 0;
// If the allocation has multiple uses, only promote it if we're not
// shrinking the amount of memory being allocated.
- uint64_t AllocElTyStoreSize = TD->getTypeStoreSize(AllocElTy);
- uint64_t CastElTyStoreSize = TD->getTypeStoreSize(CastElTy);
+ uint64_t AllocElTyStoreSize = DL->getTypeStoreSize(AllocElTy);
+ uint64_t CastElTyStoreSize = DL->getTypeStoreSize(CastElTy);
if (!AI.hasOneUse() && CastElTyStoreSize < AllocElTyStoreSize) return 0;
// See if we can satisfy the modulus by pulling a scale out of the array
bool isSigned) {
if (Constant *C = dyn_cast<Constant>(V)) {
C = ConstantExpr::getIntegerCast(C, Ty, isSigned /*Sext or ZExt*/);
- // If we got a constantexpr back, try to simplify it with TD info.
+ // If we got a constantexpr back, try to simplify it with DL info.
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
- C = ConstantFoldConstantExpression(CE, TD, TLI);
+ C = ConstantFoldConstantExpression(CE, DL, TLI);
return C;
}
const CastInst *CI, ///< The first cast instruction
unsigned opcode, ///< The opcode of the second cast instruction
Type *DstTy, ///< The target type for the second cast instruction
- DataLayout *TD ///< The target data for pointer size
+ const DataLayout *DL ///< The target data for pointer size
) {
Type *SrcTy = CI->getOperand(0)->getType(); // A from above
// Get the opcodes of the two Cast instructions
Instruction::CastOps firstOp = Instruction::CastOps(CI->getOpcode());
Instruction::CastOps secondOp = Instruction::CastOps(opcode);
- Type *SrcIntPtrTy = TD && SrcTy->isPtrOrPtrVectorTy() ?
- TD->getIntPtrType(SrcTy) : 0;
- Type *MidIntPtrTy = TD && MidTy->isPtrOrPtrVectorTy() ?
- TD->getIntPtrType(MidTy) : 0;
- Type *DstIntPtrTy = TD && DstTy->isPtrOrPtrVectorTy() ?
- TD->getIntPtrType(DstTy) : 0;
+ Type *SrcIntPtrTy = DL && SrcTy->isPtrOrPtrVectorTy() ?
+ DL->getIntPtrType(SrcTy) : 0;
+ Type *MidIntPtrTy = DL && MidTy->isPtrOrPtrVectorTy() ?
+ DL->getIntPtrType(MidTy) : 0;
+ Type *DstIntPtrTy = DL && DstTy->isPtrOrPtrVectorTy() ?
+ DL->getIntPtrType(DstTy) : 0;
unsigned Res = CastInst::isEliminableCastPair(firstOp, secondOp, SrcTy, MidTy,
DstTy, SrcIntPtrTy, MidIntPtrTy,
DstIntPtrTy);
// If this is another cast that can be eliminated, we prefer to have it
// eliminated.
if (const CastInst *CI = dyn_cast<CastInst>(V))
- if (isEliminableCastPair(CI, opc, Ty, TD))
+ if (isEliminableCastPair(CI, opc, Ty, DL))
return false;
// If this is a vector sext from a compare, then we don't want to break the
// eliminate it now.
if (CastInst *CSrc = dyn_cast<CastInst>(Src)) { // A->B->C cast
if (Instruction::CastOps opc =
- isEliminableCastPair(CSrc, CI.getOpcode(), CI.getType(), TD)) {
+ isEliminableCastPair(CSrc, CI.getOpcode(), CI.getType(), DL)) {
// The first cast (CSrc) is eliminable so we need to fix up or replace
// the second cast (CI). CSrc will then have a good chance of being dead.
return CastInst::Create(opc, CSrc->getOperand(0), CI.getType());
Instruction *InstCombiner::visitZExt(ZExtInst &CI) {
// If this zero extend is only used by a truncate, let the truncate be
// eliminated before we try to optimize this zext.
- if (CI.hasOneUse() && isa<TruncInst>(CI.use_back()))
+ if (CI.hasOneUse() && isa<TruncInst>(CI.user_back()))
return 0;
// If one of the common conversion will work, do it.
Instruction *InstCombiner::visitSExt(SExtInst &CI) {
// If this sign extend is only used by a truncate, let the truncate be
// eliminated before we try to optimize this sext.
- if (CI.hasOneUse() && isa<TruncInst>(CI.use_back()))
+ if (CI.hasOneUse() && isa<TruncInst>(CI.user_back()))
return 0;
if (Instruction *I = commonCastTransforms(CI))
// trunc or zext to the intptr_t type, then inttoptr of it. This allows the
// cast to be exposed to other transforms.
- if (TD) {
+ if (DL) {
unsigned AS = CI.getAddressSpace();
if (CI.getOperand(0)->getType()->getScalarSizeInBits() !=
- TD->getPointerSizeInBits(AS)) {
- Type *Ty = TD->getIntPtrType(CI.getContext(), AS);
+ DL->getPointerSizeInBits(AS)) {
+ Type *Ty = DL->getIntPtrType(CI.getContext(), AS);
if (CI.getType()->isVectorTy()) // Handle vectors of pointers.
Ty = VectorType::get(Ty, CI.getType()->getVectorNumElements());
return &CI;
}
- if (!TD)
+ if (!DL)
return commonCastTransforms(CI);
// If the GEP has a single use, and the base pointer is a bitcast, and the
// instructions into fewer. This typically happens with unions and other
// non-type-safe code.
unsigned AS = GEP->getPointerAddressSpace();
- unsigned OffsetBits = TD->getPointerSizeInBits(AS);
+ unsigned OffsetBits = DL->getPointerSizeInBits(AS);
APInt Offset(OffsetBits, 0);
BitCastInst *BCI = dyn_cast<BitCastInst>(GEP->getOperand(0));
if (GEP->hasOneUse() &&
BCI &&
- GEP->accumulateConstantOffset(*TD, Offset)) {
+ GEP->accumulateConstantOffset(*DL, Offset)) {
// Get the base pointer input of the bitcast, and the type it points to.
Value *OrigBase = BCI->getOperand(0);
SmallVector<Value*, 8> NewIndices;
// do a ptrtoint to intptr_t then do a trunc or zext. This allows the cast
// to be exposed to other transforms.
- if (!TD)
+ if (!DL)
return commonPointerCastTransforms(CI);
Type *Ty = CI.getType();
unsigned AS = CI.getPointerAddressSpace();
- if (Ty->getScalarSizeInBits() == TD->getPointerSizeInBits(AS))
+ if (Ty->getScalarSizeInBits() == DL->getPointerSizeInBits(AS))
return commonPointerCastTransforms(CI);
- Type *PtrTy = TD->getIntPtrType(CI.getContext(), AS);
+ Type *PtrTy = DL->getIntPtrType(CI.getContext(), AS);
if (Ty->isVectorTy()) // Handle vectors of pointers.
PtrTy = VectorType::get(PtrTy, Ty->getVectorNumElements());
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