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Use Type::getIntegralTypeMask() to simplify some code

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26034 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-02-07 07:00:41 +00:00
parent 6dce1a7dfe
commit 1a074fce15
1 changed files with 8 additions and 15 deletions
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23
lib/Transforms/Scalar/InstructionCombining.cpp
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@ -844,9 +844,8 @@ Instruction *InstCombiner::visitAdd(BinaryOperator &I) {
// X + (signbit) --> X ^ signbit // X + (signbit) --> X ^ signbit
if (ConstantInt *CI = dyn_cast<ConstantInt>(RHSC)) { if (ConstantInt *CI = dyn_cast<ConstantInt>(RHSC)) {
unsigned NumBits = CI->getType()->getPrimitiveSizeInBits(); uint64_t Val = CI->getRawValue() & CI->getType()->getIntegralTypeMask();
uint64_t Val = CI->getRawValue() & (~0ULL >> (64- NumBits)); if (Val == (1ULL << (CI->getType()->getPrimitiveSizeInBits()-1)))
if (Val == (1ULL << (NumBits-1)))
return BinaryOperator::createXor(LHS, RHS); return BinaryOperator::createXor(LHS, RHS);
} }
@ -970,7 +969,7 @@ FoundSExt:
// Form a mask of all bits from the lowest bit added through the top. // Form a mask of all bits from the lowest bit added through the top.
uint64_t AddRHSHighBits = ~((AddRHSV & -AddRHSV)-1); uint64_t AddRHSHighBits = ~((AddRHSV & -AddRHSV)-1);
AddRHSHighBits &= ~0ULL >> (64-C2->getType()->getPrimitiveSizeInBits()); AddRHSHighBits &= C2->getType()->getIntegralTypeMask();
// See if the and mask includes all of these bits. // See if the and mask includes all of these bits.
uint64_t AddRHSHighBitsAnd = AddRHSHighBits & C2->getRawValue(); uint64_t AddRHSHighBitsAnd = AddRHSHighBits & C2->getRawValue();
@ -1523,13 +1522,8 @@ Instruction *InstCombiner::visitRem(BinaryOperator &I) {
// isMaxValueMinusOne - return true if this is Max-1 // isMaxValueMinusOne - return true if this is Max-1
static bool isMaxValueMinusOne(const ConstantInt *C) { static bool isMaxValueMinusOne(const ConstantInt *C) {
if (const ConstantUInt *CU = dyn_cast<ConstantUInt>(C)) { if (const ConstantUInt *CU = dyn_cast<ConstantUInt>(C))
// Calculate -1 casted to the right type... return CU->getValue() == C->getType()->getIntegralTypeMask()-1;
unsigned TypeBits = C->getType()->getPrimitiveSizeInBits();
uint64_t Val = ~0ULL; // All ones
Val >>= 64-TypeBits; // Shift out unwanted 1 bits...
return CU->getValue() == Val-1;
}
const ConstantSInt *CS = cast<ConstantSInt>(C); const ConstantSInt *CS = cast<ConstantSInt>(C);
@ -1709,7 +1703,7 @@ Instruction *InstCombiner::OptAndOp(Instruction *Op,
uint64_t AndRHSV = cast<ConstantInt>(AndRHS)->getRawValue(); uint64_t AndRHSV = cast<ConstantInt>(AndRHS)->getRawValue();
// Clear bits that are not part of the constant. // Clear bits that are not part of the constant.
AndRHSV &= ~0ULL >> (64-AndRHS->getType()->getPrimitiveSizeInBits()); AndRHSV &= AndRHS->getType()->getIntegralTypeMask();
// If there is only one bit set... // If there is only one bit set...
if (isOneBitSet(cast<ConstantInt>(AndRHS))) { if (isOneBitSet(cast<ConstantInt>(AndRHS))) {
@ -2644,8 +2638,7 @@ static Value *EmitGEPOffset(User *GEP, Instruction &I, InstCombiner &IC) {
Value *Result = Constant::getNullValue(SIntPtrTy); Value *Result = Constant::getNullValue(SIntPtrTy);
// Build a mask for high order bits. // Build a mask for high order bits.
uint64_t PtrSizeMask = ~0ULL; uint64_t PtrSizeMask = ~0ULL >> (64-TD.getPointerSize()*8);
PtrSizeMask >>= 64-(TD.getPointerSize()*8);
for (unsigned i = 1, e = GEP->getNumOperands(); i != e; ++i, ++GTI) { for (unsigned i = 1, e = GEP->getNumOperands(); i != e; ++i, ++GTI) {
Value *Op = GEP->getOperand(i); Value *Op = GEP->getOperand(i);
@ -4245,7 +4238,7 @@ Instruction *InstCombiner::visitCastInst(CastInst &CI) {
CI.getType()->getPrimitiveSizeInBits()) { CI.getType()->getPrimitiveSizeInBits()) {
assert(CSrc->getType() != Type::ULongTy && assert(CSrc->getType() != Type::ULongTy &&
"Cannot have type bigger than ulong!"); "Cannot have type bigger than ulong!");
uint64_t AndValue = ~0ULL>>(64-CSrc->getType()->getPrimitiveSizeInBits()); uint64_t AndValue = CSrc->getType()->getIntegralTypeMask();
Constant *AndOp = ConstantUInt::get(A->getType()->getUnsignedVersion(), Constant *AndOp = ConstantUInt::get(A->getType()->getUnsignedVersion(),
AndValue); AndValue);
AndOp = ConstantExpr::getCast(AndOp, A->getType()); AndOp = ConstantExpr::getCast(AndOp, A->getType());