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//===-- gen/abi-spirv.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/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"
using namespace dmd;
struct SPIRVTargetABI : TargetABI {
DComputePointerRewrite pointerRewite;
llvm::CallingConv::ID callingConv(LINK l) override {
assert(l == LINK::c);
return llvm::CallingConv::SPIR_FUNC;
}
llvm::CallingConv::ID callingConv(FuncDeclaration *fdecl) override {
return hasKernelAttr(fdecl) ? llvm::CallingConv::SPIR_KERNEL
: llvm::CallingConv::SPIR_FUNC;
}
bool passByVal(TypeFunction *, Type *t) override {
t = t->toBasetype();
return ((t->ty == TY::Tsarray || t->ty == TY::Tstruct) && size(t) > 64);
}
void rewriteFunctionType(IrFuncTy &fty) override {
for (auto arg : fty.args) {
if (!arg->byref)
rewriteArgument(fty, *arg);
}
if (!skipReturnValueRewrite(fty))
rewriteArgument(fty, *fty.ret);
}
bool returnInArg(TypeFunction *tf, bool) override {
if (tf->isref())
return false;
Type *retty = tf->next->toBasetype();
if (retty->ty == TY::Tsarray)
return true;
else if (auto st = retty->isTypeStruct())
return !toDcomputePointer(st->sym);
else
return false;
}
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 *createSPIRVABI() { return new SPIRVTargetABI(); }
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