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Imported Upstream version 5.18.0.234

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Former-commit-id: 8071ec1a8c5eaa9be24b41745add19297608001f
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Xamarin Public Jenkins (auto-signing)
2019-01-08 08:22:36 +00:00
parent f32dbaf0b2
commit 212f6bafcb
28494 changed files with 359 additions and 3867025 deletions
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159
external/llvm/lib/IR/IntrinsicInst.cpp vendored
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@ -1,159 +0,0 @@
//===-- InstrinsicInst.cpp - Intrinsic Instruction Wrappers ---------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements methods that make it really easy to deal with intrinsic
// functions.
//
// All intrinsic function calls are instances of the call instruction, so these
// are all subclasses of the CallInst class. Note that none of these classes
// has state or virtual methods, which is an important part of this gross/neat
// hack working.
//
// In some cases, arguments to intrinsics need to be generic and are defined as
// type pointer to empty struct { }*. To access the real item of interest the
// cast instruction needs to be stripped away.
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/Metadata.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
//===----------------------------------------------------------------------===//
/// DbgInfoIntrinsic - This is the common base class for debug info intrinsics
///
Value *DbgInfoIntrinsic::getVariableLocation(bool AllowNullOp) const {
Value *Op = getArgOperand(0);
if (AllowNullOp && !Op)
return nullptr;
auto *MD = cast<MetadataAsValue>(Op)->getMetadata();
if (auto *V = dyn_cast<ValueAsMetadata>(MD))
return V->getValue();
// When the value goes to null, it gets replaced by an empty MDNode.
assert(!cast<MDNode>(MD)->getNumOperands() && "Expected an empty MDNode");
return nullptr;
}
int llvm::Intrinsic::lookupLLVMIntrinsicByName(ArrayRef<const char *> NameTable,
StringRef Name) {
assert(Name.startswith("llvm."));
// Do successive binary searches of the dotted name components. For
// "llvm.gc.experimental.statepoint.p1i8.p1i32", we will find the range of
// intrinsics starting with "llvm.gc", then "llvm.gc.experimental", then
// "llvm.gc.experimental.statepoint", and then we will stop as the range is
// size 1. During the search, we can skip the prefix that we already know is
// identical. By using strncmp we consider names with differing suffixes to
// be part of the equal range.
size_t CmpStart = 0;
size_t CmpEnd = 4; // Skip the "llvm" component.
const char *const *Low = NameTable.begin();
const char *const *High = NameTable.end();
const char *const *LastLow = Low;
while (CmpEnd < Name.size() && High - Low > 0) {
CmpStart = CmpEnd;
CmpEnd = Name.find('.', CmpStart + 1);
CmpEnd = CmpEnd == StringRef::npos ? Name.size() : CmpEnd;
auto Cmp = [CmpStart, CmpEnd](const char *LHS, const char *RHS) {
return strncmp(LHS + CmpStart, RHS + CmpStart, CmpEnd - CmpStart) < 0;
};
LastLow = Low;
std::tie(Low, High) = std::equal_range(Low, High, Name.data(), Cmp);
}
if (High - Low > 0)
LastLow = Low;
if (LastLow == NameTable.end())
return -1;
StringRef NameFound = *LastLow;
if (Name == NameFound ||
(Name.startswith(NameFound) && Name[NameFound.size()] == '.'))
return LastLow - NameTable.begin();
return -1;
}
Value *InstrProfIncrementInst::getStep() const {
if (InstrProfIncrementInstStep::classof(this)) {
return const_cast<Value *>(getArgOperand(4));
}
const Module *M = getModule();
LLVMContext &Context = M->getContext();
return ConstantInt::get(Type::getInt64Ty(Context), 1);
}
ConstrainedFPIntrinsic::RoundingMode
ConstrainedFPIntrinsic::getRoundingMode() const {
unsigned NumOperands = getNumArgOperands();
Metadata *MD =
dyn_cast<MetadataAsValue>(getArgOperand(NumOperands - 2))->getMetadata();
if (!MD || !isa<MDString>(MD))
return rmInvalid;
StringRef RoundingArg = cast<MDString>(MD)->getString();
// For dynamic rounding mode, we use round to nearest but we will set the
// 'exact' SDNodeFlag so that the value will not be rounded.
return StringSwitch<RoundingMode>(RoundingArg)
.Case("round.dynamic", rmDynamic)
.Case("round.tonearest", rmToNearest)
.Case("round.downward", rmDownward)
.Case("round.upward", rmUpward)
.Case("round.towardzero", rmTowardZero)
.Default(rmInvalid);
}
ConstrainedFPIntrinsic::ExceptionBehavior
ConstrainedFPIntrinsic::getExceptionBehavior() const {
unsigned NumOperands = getNumArgOperands();
Metadata *MD =
dyn_cast<MetadataAsValue>(getArgOperand(NumOperands - 1))->getMetadata();
if (!MD || !isa<MDString>(MD))
return ebInvalid;
StringRef ExceptionArg = cast<MDString>(MD)->getString();
return StringSwitch<ExceptionBehavior>(ExceptionArg)
.Case("fpexcept.ignore", ebIgnore)
.Case("fpexcept.maytrap", ebMayTrap)
.Case("fpexcept.strict", ebStrict)
.Default(ebInvalid);
}
bool ConstrainedFPIntrinsic::isUnaryOp() const {
switch (getIntrinsicID()) {
default:
return false;
case Intrinsic::experimental_constrained_sqrt:
case Intrinsic::experimental_constrained_sin:
case Intrinsic::experimental_constrained_cos:
case Intrinsic::experimental_constrained_exp:
case Intrinsic::experimental_constrained_exp2:
case Intrinsic::experimental_constrained_log:
case Intrinsic::experimental_constrained_log10:
case Intrinsic::experimental_constrained_log2:
case Intrinsic::experimental_constrained_rint:
case Intrinsic::experimental_constrained_nearbyint:
return true;
}
}
bool ConstrainedFPIntrinsic::isTernaryOp() const {
switch (getIntrinsicID()) {
default:
return false;
case Intrinsic::experimental_constrained_fma:
return true;
}
}