2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
239 lines
8.5 KiB
C++
239 lines
8.5 KiB
C++
//===--- NVPTX.cpp - Implement NVPTX target feature support ---------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements NVPTX TargetInfo objects.
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//
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//===----------------------------------------------------------------------===//
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#include "NVPTX.h"
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#include "Targets.h"
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#include "clang/Basic/Builtins.h"
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#include "clang/Basic/MacroBuilder.h"
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#include "clang/Basic/TargetBuiltins.h"
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#include "llvm/ADT/StringSwitch.h"
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using namespace clang;
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using namespace clang::targets;
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const Builtin::Info NVPTXTargetInfo::BuiltinInfo[] = {
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#define BUILTIN(ID, TYPE, ATTRS) \
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{#ID, TYPE, ATTRS, nullptr, ALL_LANGUAGES, nullptr},
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#define LIBBUILTIN(ID, TYPE, ATTRS, HEADER) \
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{#ID, TYPE, ATTRS, HEADER, ALL_LANGUAGES, nullptr},
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#define TARGET_BUILTIN(ID, TYPE, ATTRS, FEATURE) \
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{#ID, TYPE, ATTRS, nullptr, ALL_LANGUAGES, FEATURE},
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#include "clang/Basic/BuiltinsNVPTX.def"
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};
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const char *const NVPTXTargetInfo::GCCRegNames[] = {"r0"};
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NVPTXTargetInfo::NVPTXTargetInfo(const llvm::Triple &Triple,
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const TargetOptions &Opts,
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unsigned TargetPointerWidth)
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: TargetInfo(Triple) {
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assert((TargetPointerWidth == 32 || TargetPointerWidth == 64) &&
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"NVPTX only supports 32- and 64-bit modes.");
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PTXVersion = 32;
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for (const StringRef Feature : Opts.FeaturesAsWritten) {
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if (!Feature.startswith("+ptx"))
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continue;
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PTXVersion = llvm::StringSwitch<unsigned>(Feature)
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.Case("+ptx61", 61)
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.Case("+ptx60", 60)
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.Case("+ptx50", 50)
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.Case("+ptx43", 43)
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.Case("+ptx42", 42)
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.Case("+ptx41", 41)
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.Case("+ptx40", 40)
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.Case("+ptx32", 32)
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.Default(32);
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}
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TLSSupported = false;
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VLASupported = false;
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AddrSpaceMap = &NVPTXAddrSpaceMap;
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UseAddrSpaceMapMangling = true;
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// Define available target features
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// These must be defined in sorted order!
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NoAsmVariants = true;
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GPU = CudaArch::SM_20;
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if (TargetPointerWidth == 32)
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resetDataLayout("e-p:32:32-i64:64-i128:128-v16:16-v32:32-n16:32:64");
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else if (Opts.NVPTXUseShortPointers)
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resetDataLayout(
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"e-p3:32:32-p4:32:32-p5:32:32-i64:64-i128:128-v16:16-v32:32-n16:32:64");
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else
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resetDataLayout("e-i64:64-i128:128-v16:16-v32:32-n16:32:64");
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// If possible, get a TargetInfo for our host triple, so we can match its
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// types.
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llvm::Triple HostTriple(Opts.HostTriple);
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if (!HostTriple.isNVPTX())
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HostTarget.reset(AllocateTarget(llvm::Triple(Opts.HostTriple), Opts));
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// If no host target, make some guesses about the data layout and return.
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if (!HostTarget) {
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LongWidth = LongAlign = TargetPointerWidth;
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PointerWidth = PointerAlign = TargetPointerWidth;
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switch (TargetPointerWidth) {
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case 32:
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SizeType = TargetInfo::UnsignedInt;
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PtrDiffType = TargetInfo::SignedInt;
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IntPtrType = TargetInfo::SignedInt;
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break;
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case 64:
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SizeType = TargetInfo::UnsignedLong;
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PtrDiffType = TargetInfo::SignedLong;
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IntPtrType = TargetInfo::SignedLong;
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break;
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default:
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llvm_unreachable("TargetPointerWidth must be 32 or 64");
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}
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return;
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}
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// Copy properties from host target.
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PointerWidth = HostTarget->getPointerWidth(/* AddrSpace = */ 0);
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PointerAlign = HostTarget->getPointerAlign(/* AddrSpace = */ 0);
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BoolWidth = HostTarget->getBoolWidth();
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BoolAlign = HostTarget->getBoolAlign();
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IntWidth = HostTarget->getIntWidth();
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IntAlign = HostTarget->getIntAlign();
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HalfWidth = HostTarget->getHalfWidth();
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HalfAlign = HostTarget->getHalfAlign();
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FloatWidth = HostTarget->getFloatWidth();
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FloatAlign = HostTarget->getFloatAlign();
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DoubleWidth = HostTarget->getDoubleWidth();
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DoubleAlign = HostTarget->getDoubleAlign();
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LongWidth = HostTarget->getLongWidth();
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LongAlign = HostTarget->getLongAlign();
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LongLongWidth = HostTarget->getLongLongWidth();
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LongLongAlign = HostTarget->getLongLongAlign();
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MinGlobalAlign = HostTarget->getMinGlobalAlign();
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NewAlign = HostTarget->getNewAlign();
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DefaultAlignForAttributeAligned =
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HostTarget->getDefaultAlignForAttributeAligned();
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SizeType = HostTarget->getSizeType();
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IntMaxType = HostTarget->getIntMaxType();
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PtrDiffType = HostTarget->getPtrDiffType(/* AddrSpace = */ 0);
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IntPtrType = HostTarget->getIntPtrType();
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WCharType = HostTarget->getWCharType();
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WIntType = HostTarget->getWIntType();
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Char16Type = HostTarget->getChar16Type();
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Char32Type = HostTarget->getChar32Type();
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Int64Type = HostTarget->getInt64Type();
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SigAtomicType = HostTarget->getSigAtomicType();
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ProcessIDType = HostTarget->getProcessIDType();
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UseBitFieldTypeAlignment = HostTarget->useBitFieldTypeAlignment();
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UseZeroLengthBitfieldAlignment = HostTarget->useZeroLengthBitfieldAlignment();
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UseExplicitBitFieldAlignment = HostTarget->useExplicitBitFieldAlignment();
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ZeroLengthBitfieldBoundary = HostTarget->getZeroLengthBitfieldBoundary();
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// This is a bit of a lie, but it controls __GCC_ATOMIC_XXX_LOCK_FREE, and
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// we need those macros to be identical on host and device, because (among
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// other things) they affect which standard library classes are defined, and
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// we need all classes to be defined on both the host and device.
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MaxAtomicInlineWidth = HostTarget->getMaxAtomicInlineWidth();
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// Properties intentionally not copied from host:
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// - LargeArrayMinWidth, LargeArrayAlign: Not visible across the
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// host/device boundary.
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// - SuitableAlign: Not visible across the host/device boundary, and may
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// correctly be different on host/device, e.g. if host has wider vector
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// types than device.
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// - LongDoubleWidth, LongDoubleAlign: nvptx's long double type is the same
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// as its double type, but that's not necessarily true on the host.
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// TODO: nvcc emits a warning when using long double on device; we should
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// do the same.
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}
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ArrayRef<const char *> NVPTXTargetInfo::getGCCRegNames() const {
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return llvm::makeArrayRef(GCCRegNames);
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}
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bool NVPTXTargetInfo::hasFeature(StringRef Feature) const {
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return llvm::StringSwitch<bool>(Feature)
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.Cases("ptx", "nvptx", true)
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.Default(false);
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}
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void NVPTXTargetInfo::getTargetDefines(const LangOptions &Opts,
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MacroBuilder &Builder) const {
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Builder.defineMacro("__PTX__");
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Builder.defineMacro("__NVPTX__");
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if (Opts.CUDAIsDevice) {
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// Set __CUDA_ARCH__ for the GPU specified.
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std::string CUDAArchCode = [this] {
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switch (GPU) {
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case CudaArch::GFX600:
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case CudaArch::GFX601:
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case CudaArch::GFX700:
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case CudaArch::GFX701:
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case CudaArch::GFX702:
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case CudaArch::GFX703:
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case CudaArch::GFX704:
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case CudaArch::GFX801:
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case CudaArch::GFX802:
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case CudaArch::GFX803:
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case CudaArch::GFX810:
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case CudaArch::GFX900:
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case CudaArch::GFX902:
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case CudaArch::GFX904:
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case CudaArch::GFX906:
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case CudaArch::GFX909:
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case CudaArch::LAST:
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break;
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case CudaArch::UNKNOWN:
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assert(false && "No GPU arch when compiling CUDA device code.");
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return "";
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case CudaArch::SM_20:
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return "200";
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case CudaArch::SM_21:
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return "210";
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case CudaArch::SM_30:
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return "300";
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case CudaArch::SM_32:
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return "320";
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case CudaArch::SM_35:
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return "350";
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case CudaArch::SM_37:
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return "370";
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case CudaArch::SM_50:
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return "500";
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case CudaArch::SM_52:
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return "520";
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case CudaArch::SM_53:
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return "530";
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case CudaArch::SM_60:
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return "600";
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case CudaArch::SM_61:
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return "610";
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case CudaArch::SM_62:
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return "620";
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case CudaArch::SM_70:
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return "700";
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case CudaArch::SM_72:
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return "720";
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case CudaArch::SM_75:
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return "750";
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}
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llvm_unreachable("unhandled CudaArch");
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}();
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Builder.defineMacro("__CUDA_ARCH__", CUDAArchCode);
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}
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}
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ArrayRef<Builtin::Info> NVPTXTargetInfo::getTargetBuiltins() const {
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return llvm::makeArrayRef(BuiltinInfo, clang::NVPTX::LastTSBuiltin -
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Builtin::FirstTSBuiltin);
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}
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