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//=== WebAssembly.h - Declare WebAssembly target feature support *- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file declares WebAssembly TargetInfo objects.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_LIB_BASIC_TARGETS_WEBASSEMBLY_H
#define LLVM_CLANG_LIB_BASIC_TARGETS_WEBASSEMBLY_H
#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/TargetOptions.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Support/Compiler.h"
namespace clang {
namespace targets {
class LLVM_LIBRARY_VISIBILITY WebAssemblyTargetInfo : public TargetInfo {
enum SIMDEnum {
NoSIMD,
SIMD128,
RelaxedSIMD,
} SIMDLevel = NoSIMD;
bool HasNontrappingFPToInt = false;
bool HasSignExt = false;
bool HasExceptionHandling = false;
bool HasBulkMemory = false;
bool HasAtomics = false;
bool HasMutableGlobals = false;
bool HasMultivalue = false;
bool HasTailCall = false;
bool HasReferenceTypes = false;
bool HasExtendedConst = false;
std::string ABI;
public:
explicit WebAssemblyTargetInfo(const llvm::Triple &T, const TargetOptions &)
: TargetInfo(T) {
NoAsmVariants = true;
SuitableAlign = 128;
LargeArrayMinWidth = 128;
LargeArrayAlign = 128;
SimdDefaultAlign = 128;
SigAtomicType = SignedLong;
LongDoubleWidth = LongDoubleAlign = 128;
LongDoubleFormat = &llvm::APFloat::IEEEquad();
MaxAtomicPromoteWidth = MaxAtomicInlineWidth = 64;
// size_t being unsigned long for both wasm32 and wasm64 makes mangled names
// more consistent between the two.
SizeType = UnsignedLong;
PtrDiffType = SignedLong;
IntPtrType = SignedLong;
}
StringRef getABI() const override;
bool setABI(const std::string &Name) override;
protected:
void getTargetDefines(const LangOptions &Opts,
MacroBuilder &Builder) const override;
private:
static void setSIMDLevel(llvm::StringMap<bool> &Features, SIMDEnum Level,
bool Enabled);
bool
initFeatureMap(llvm::StringMap<bool> &Features, DiagnosticsEngine &Diags,
StringRef CPU,
const std::vector<std::string> &FeaturesVec) const override;
bool hasFeature(StringRef Feature) const final;
void setFeatureEnabled(llvm::StringMap<bool> &Features, StringRef Name,
bool Enabled) const final;
bool handleTargetFeatures(std::vector<std::string> &Features,
DiagnosticsEngine &Diags) final;
bool isValidCPUName(StringRef Name) const final;
void fillValidCPUList(SmallVectorImpl<StringRef> &Values) const final;
bool setCPU(const std::string &Name) final { return isValidCPUName(Name); }
ArrayRef<Builtin::Info> getTargetBuiltins() const final;
BuiltinVaListKind getBuiltinVaListKind() const final {
return VoidPtrBuiltinVaList;
}
ArrayRef<const char *> getGCCRegNames() const final { return std::nullopt; }
ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const final {
return std::nullopt;
}
bool validateAsmConstraint(const char *&Name,
TargetInfo::ConstraintInfo &Info) const final {
return false;
}
const char *getClobbers() const final { return ""; }
bool isCLZForZeroUndef() const final { return false; }
bool hasInt128Type() const final { return true; }
IntType getIntTypeByWidth(unsigned BitWidth, bool IsSigned) const final {
// WebAssembly prefers long long for explicitly 64-bit integers.
return BitWidth == 64 ? (IsSigned ? SignedLongLong : UnsignedLongLong)
: TargetInfo::getIntTypeByWidth(BitWidth, IsSigned);
}
IntType getLeastIntTypeByWidth(unsigned BitWidth, bool IsSigned) const final {
// WebAssembly uses long long for int_least64_t and int_fast64_t.
return BitWidth == 64
? (IsSigned ? SignedLongLong : UnsignedLongLong)
: TargetInfo::getLeastIntTypeByWidth(BitWidth, IsSigned);
}
CallingConvCheckResult checkCallingConvention(CallingConv CC) const override {
switch (CC) {
case CC_C:
case CC_Swift:
return CCCR_OK;
case CC_SwiftAsync:
return CCCR_Error;
default:
return CCCR_Warning;
}
}
bool hasBitIntType() const override { return true; }
bool hasProtectedVisibility() const override { return false; }
void adjust(DiagnosticsEngine &Diags, LangOptions &Opts) override;
};
class LLVM_LIBRARY_VISIBILITY WebAssembly32TargetInfo
: public WebAssemblyTargetInfo {
public:
explicit WebAssembly32TargetInfo(const llvm::Triple &T,
const TargetOptions &Opts)
: WebAssemblyTargetInfo(T, Opts) {
if (T.isOSEmscripten())
resetDataLayout("e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-f128:64-n32:64-"
"S128-ni:1:10:20");
else
resetDataLayout(
"e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20");
}
protected:
void getTargetDefines(const LangOptions &Opts,
MacroBuilder &Builder) const override;
};
class LLVM_LIBRARY_VISIBILITY WebAssembly64TargetInfo
: public WebAssemblyTargetInfo {
public:
explicit WebAssembly64TargetInfo(const llvm::Triple &T,
const TargetOptions &Opts)
: WebAssemblyTargetInfo(T, Opts) {
LongAlign = LongWidth = 64;
PointerAlign = PointerWidth = 64;
SizeType = UnsignedLong;
PtrDiffType = SignedLong;
IntPtrType = SignedLong;
if (T.isOSEmscripten())
resetDataLayout("e-m:e-p:64:64-p10:8:8-p20:8:8-i64:64-f128:64-n32:64-"
"S128-ni:1:10:20");
else
resetDataLayout(
"e-m:e-p:64:64-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20");
}
protected:
void getTargetDefines(const LangOptions &Opts,
MacroBuilder &Builder) const override;
};
} // namespace targets
} // namespace clang
#endif // LLVM_CLANG_LIB_BASIC_TARGETS_WEBASSEMBLY_H
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