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//===-- gen/abi-nvptx.cpp ---------------------------------------*- C++ -*-===//
//
// LDC – the LLVM D compiler
//
// This file is distributed under the BSD-style LDC license. See the LICENSE
// file for details.
//
//===----------------------------------------------------------------------===//
#include "gen/abi.h"
#include "gen/dcompute/druntime.h"
#include "gen/uda.h"
#include "dmd/declaration.h"
#include "gen/tollvm.h"
#include "gen/dcompute/abi-rewrites.h"
struct NVPTXTargetABI : TargetABI {
DComputePointerRewrite pointerRewite;
llvm::CallingConv::ID callingConv(LINK) override {
llvm_unreachable("expected FuncDeclaration overload to be used");
}
llvm::CallingConv::ID callingConv(FuncDeclaration *fdecl) override {
return hasKernelAttr(fdecl) ? llvm::CallingConv::PTX_Kernel
: llvm::CallingConv::PTX_Device;
}
bool passByVal(TypeFunction *, Type *t) override {
t = t->toBasetype();
return ((t->ty == TY::Tsarray || t->ty == TY::Tstruct) && t->size() > 64);
}
void rewriteFunctionType(IrFuncTy &fty) override {
for (auto arg : fty.args) {
if (!arg->byref)
rewriteArgument(fty, *arg);
}
}
bool returnInArg(TypeFunction *tf, bool) override {
return !tf->isref() && DtoIsInMemoryOnly(tf->next);
}
void rewriteArgument(IrFuncTy &fty, IrFuncTyArg &arg) override {
Type *ty = arg.type->toBasetype();
llvm::Optional<DcomputePointer> ptr;
if (ty->ty == TY::Tstruct &&
(ptr = toDcomputePointer(static_cast<TypeStruct *>(ty)->sym))) {
pointerRewite.applyTo(arg);
}
}
// There are no exceptions at all, so no need for unwind tables.
bool needsUnwindTables() override {
return false;
}
};
TargetABI *createNVPTXABI() { return new NVPTXTargetABI(); }
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