mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-19 02:52:53 +02:00
e2177a8321
Summary: This makes it easier/cleaner to generate a single signature from this directive. Also: - Adds the symbol name, such that we don't depend on the location of this directive anymore. - Actually constructs the signature in the assembler, and make the assembler own it. - Refactor the use of MVT vs ValType in the streamer and assembler to require less conversions overall. - Changed 700 or so tests to use it. Reviewers: sbc100, dschuff Subscribers: jgravelle-google, eraman, aheejin, sunfish, jfb, llvm-commits Differential Revision: https://reviews.llvm.org/D54652 llvm-svn: 347228
81 lines
2.8 KiB
C++
81 lines
2.8 KiB
C++
//=- WebAssemblyMachineFunctionInfo.cpp - WebAssembly Machine Function Info -=//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
///
|
|
/// \file
|
|
/// This file implements WebAssembly-specific per-machine-function
|
|
/// information.
|
|
///
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "WebAssemblyMachineFunctionInfo.h"
|
|
#include "WebAssemblyISelLowering.h"
|
|
#include "WebAssemblySubtarget.h"
|
|
#include "llvm/CodeGen/Analysis.h"
|
|
using namespace llvm;
|
|
|
|
WebAssemblyFunctionInfo::~WebAssemblyFunctionInfo() {}
|
|
|
|
void WebAssemblyFunctionInfo::initWARegs() {
|
|
assert(WARegs.empty());
|
|
unsigned Reg = UnusedReg;
|
|
WARegs.resize(MF.getRegInfo().getNumVirtRegs(), Reg);
|
|
}
|
|
|
|
void llvm::ComputeLegalValueVTs(const Function &F, const TargetMachine &TM,
|
|
Type *Ty, SmallVectorImpl<MVT> &ValueVTs) {
|
|
const DataLayout &DL(F.getParent()->getDataLayout());
|
|
const WebAssemblyTargetLowering &TLI =
|
|
*TM.getSubtarget<WebAssemblySubtarget>(F).getTargetLowering();
|
|
SmallVector<EVT, 4> VTs;
|
|
ComputeValueVTs(TLI, DL, Ty, VTs);
|
|
|
|
for (EVT VT : VTs) {
|
|
unsigned NumRegs = TLI.getNumRegisters(F.getContext(), VT);
|
|
MVT RegisterVT = TLI.getRegisterType(F.getContext(), VT);
|
|
for (unsigned i = 0; i != NumRegs; ++i)
|
|
ValueVTs.push_back(RegisterVT);
|
|
}
|
|
}
|
|
|
|
void llvm::ComputeSignatureVTs(const FunctionType *Ty, const Function &F,
|
|
const TargetMachine &TM,
|
|
SmallVectorImpl<MVT> &Params,
|
|
SmallVectorImpl<MVT> &Results) {
|
|
ComputeLegalValueVTs(F, TM, Ty->getReturnType(), Results);
|
|
|
|
MVT PtrVT = MVT::getIntegerVT(TM.createDataLayout().getPointerSizeInBits());
|
|
if (Results.size() > 1) {
|
|
// WebAssembly currently can't lower returns of multiple values without
|
|
// demoting to sret (see WebAssemblyTargetLowering::CanLowerReturn). So
|
|
// replace multiple return values with a pointer parameter.
|
|
Results.clear();
|
|
Params.push_back(PtrVT);
|
|
}
|
|
|
|
for (auto *Param : Ty->params())
|
|
ComputeLegalValueVTs(F, TM, Param, Params);
|
|
if (Ty->isVarArg())
|
|
Params.push_back(PtrVT);
|
|
}
|
|
|
|
void llvm::ValTypesFromMVTs(const ArrayRef<MVT> &In,
|
|
SmallVectorImpl<wasm::ValType> &Out) {
|
|
for (MVT Ty : In)
|
|
Out.push_back(WebAssembly::toValType(Ty));
|
|
}
|
|
|
|
std::unique_ptr<wasm::WasmSignature>
|
|
llvm::SignatureFromMVTs(const SmallVectorImpl<MVT> &Results,
|
|
const SmallVectorImpl<MVT> &Params) {
|
|
auto Sig = make_unique<wasm::WasmSignature>();
|
|
ValTypesFromMVTs(Results, Sig->Returns);
|
|
ValTypesFromMVTs(Params, Sig->Params);
|
|
return Sig;
|
|
}
|