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//===-- Character.cpp -- runtime for CHARACTER type entities --------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "flang/Optimizer/Builder/Runtime/Character.h"
#include "flang/Optimizer/Builder/BoxValue.h"
#include "flang/Optimizer/Builder/Character.h"
#include "flang/Optimizer/Builder/FIRBuilder.h"
#include "flang/Optimizer/Builder/Runtime/RTBuilder.h"
#include "flang/Optimizer/Builder/Todo.h"
#include "flang/Runtime/character.h"
#include "mlir/Dialect/Func/IR/FuncOps.h"
using namespace Fortran::runtime;
/// Generate calls to string handling intrinsics such as index, scan, and
/// verify. These are the descriptor based implementations that take four
/// arguments (string1, string2, back, kind).
template <typename FN>
static void genCharacterSearch(FN func, fir::FirOpBuilder &builder,
mlir::Location loc, mlir::Value resultBox,
mlir::Value string1Box, mlir::Value string2Box,
mlir::Value backBox, mlir::Value kind) {
auto fTy = func.getFunctionType();
auto sourceFile = fir::factory::locationToFilename(builder, loc);
auto sourceLine =
fir::factory::locationToLineNo(builder, loc, fTy.getInput(6));
auto args = fir::runtime::createArguments(builder, loc, fTy, resultBox,
string1Box, string2Box, backBox,
kind, sourceFile, sourceLine);
builder.create<fir::CallOp>(loc, func, args);
}
/// Helper function to recover the KIND from the FIR type.
static int discoverKind(mlir::Type ty) {
if (auto charTy = ty.dyn_cast<fir::CharacterType>())
return charTy.getFKind();
if (auto eleTy = fir::dyn_cast_ptrEleTy(ty))
return discoverKind(eleTy);
if (auto arrTy = ty.dyn_cast<fir::SequenceType>())
return discoverKind(arrTy.getEleTy());
if (auto boxTy = ty.dyn_cast<fir::BoxCharType>())
return discoverKind(boxTy.getEleTy());
if (auto boxTy = ty.dyn_cast<fir::BoxType>())
return discoverKind(boxTy.getEleTy());
llvm_unreachable("unexpected character type");
}
//===----------------------------------------------------------------------===//
// Lower character operations
//===----------------------------------------------------------------------===//
/// Generate a call to the `ADJUST[L|R]` runtime.
///
/// \p resultBox must be an unallocated allocatable used for the temporary
/// result. \p StringBox must be a fir.box describing the adjustr string
/// argument. The \p adjustFunc should be a mlir::func::FuncOp for the
/// appropriate runtime entry function.
static void genAdjust(fir::FirOpBuilder &builder, mlir::Location loc,
mlir::Value resultBox, mlir::Value stringBox,
mlir::func::FuncOp &adjustFunc) {
auto fTy = adjustFunc.getFunctionType();
auto sourceLine =
fir::factory::locationToLineNo(builder, loc, fTy.getInput(3));
auto sourceFile = fir::factory::locationToFilename(builder, loc);
auto args = fir::runtime::createArguments(builder, loc, fTy, resultBox,
stringBox, sourceFile, sourceLine);
builder.create<fir::CallOp>(loc, adjustFunc, args);
}
void fir::runtime::genAdjustL(fir::FirOpBuilder &builder, mlir::Location loc,
mlir::Value resultBox, mlir::Value stringBox) {
auto adjustFunc =
fir::runtime::getRuntimeFunc<mkRTKey(Adjustl)>(loc, builder);
genAdjust(builder, loc, resultBox, stringBox, adjustFunc);
}
void fir::runtime::genAdjustR(fir::FirOpBuilder &builder, mlir::Location loc,
mlir::Value resultBox, mlir::Value stringBox) {
auto adjustFunc =
fir::runtime::getRuntimeFunc<mkRTKey(Adjustr)>(loc, builder);
genAdjust(builder, loc, resultBox, stringBox, adjustFunc);
}
mlir::Value
fir::runtime::genCharCompare(fir::FirOpBuilder &builder, mlir::Location loc,
mlir::arith::CmpIPredicate cmp,
mlir::Value lhsBuff, mlir::Value lhsLen,
mlir::Value rhsBuff, mlir::Value rhsLen) {
mlir::func::FuncOp beginFunc;
switch (discoverKind(lhsBuff.getType())) {
case 1:
beginFunc = fir::runtime::getRuntimeFunc<mkRTKey(CharacterCompareScalar1)>(
loc, builder);
break;
case 2:
beginFunc = fir::runtime::getRuntimeFunc<mkRTKey(CharacterCompareScalar2)>(
loc, builder);
break;
case 4:
beginFunc = fir::runtime::getRuntimeFunc<mkRTKey(CharacterCompareScalar4)>(
loc, builder);
break;
default:
llvm_unreachable("runtime does not support CHARACTER KIND");
}
auto fTy = beginFunc.getFunctionType();
auto args = fir::runtime::createArguments(builder, loc, fTy, lhsBuff, rhsBuff,
lhsLen, rhsLen);
auto tri = builder.create<fir::CallOp>(loc, beginFunc, args).getResult(0);
auto zero = builder.createIntegerConstant(loc, tri.getType(), 0);
return builder.create<mlir::arith::CmpIOp>(loc, cmp, tri, zero);
}
mlir::Value fir::runtime::genCharCompare(fir::FirOpBuilder &builder,
mlir::Location loc,
mlir::arith::CmpIPredicate cmp,
const fir::ExtendedValue &lhs,
const fir::ExtendedValue &rhs) {
if (lhs.getBoxOf<fir::BoxValue>() || rhs.getBoxOf<fir::BoxValue>())
TODO(loc, "character compare from descriptors");
auto allocateIfNotInMemory = [&](mlir::Value base) -> mlir::Value {
if (fir::isa_ref_type(base.getType()))
return base;
auto mem =
builder.create<fir::AllocaOp>(loc, base.getType(), /*pinned=*/false);
builder.create<fir::StoreOp>(loc, base, mem);
return mem;
};
auto lhsBuffer = allocateIfNotInMemory(fir::getBase(lhs));
auto rhsBuffer = allocateIfNotInMemory(fir::getBase(rhs));
return genCharCompare(builder, loc, cmp, lhsBuffer, fir::getLen(lhs),
rhsBuffer, fir::getLen(rhs));
}
mlir::Value fir::runtime::genIndex(fir::FirOpBuilder &builder,
mlir::Location loc, int kind,
mlir::Value stringBase,
mlir::Value stringLen,
mlir::Value substringBase,
mlir::Value substringLen, mlir::Value back) {
mlir::func::FuncOp indexFunc;
switch (kind) {
case 1:
indexFunc = fir::runtime::getRuntimeFunc<mkRTKey(Index1)>(loc, builder);
break;
case 2:
indexFunc = fir::runtime::getRuntimeFunc<mkRTKey(Index2)>(loc, builder);
break;
case 4:
indexFunc = fir::runtime::getRuntimeFunc<mkRTKey(Index4)>(loc, builder);
break;
default:
fir::emitFatalError(
loc, "unsupported CHARACTER kind value. Runtime expects 1, 2, or 4.");
}
auto fTy = indexFunc.getFunctionType();
auto args =
fir::runtime::createArguments(builder, loc, fTy, stringBase, stringLen,
substringBase, substringLen, back);
return builder.create<fir::CallOp>(loc, indexFunc, args).getResult(0);
}
void fir::runtime::genIndexDescriptor(fir::FirOpBuilder &builder,
mlir::Location loc, mlir::Value resultBox,
mlir::Value stringBox,
mlir::Value substringBox,
mlir::Value backOpt, mlir::Value kind) {
auto indexFunc = fir::runtime::getRuntimeFunc<mkRTKey(Index)>(loc, builder);
genCharacterSearch(indexFunc, builder, loc, resultBox, stringBox,
substringBox, backOpt, kind);
}
void fir::runtime::genRepeat(fir::FirOpBuilder &builder, mlir::Location loc,
mlir::Value resultBox, mlir::Value stringBox,
mlir::Value ncopies) {
auto repeatFunc = fir::runtime::getRuntimeFunc<mkRTKey(Repeat)>(loc, builder);
auto fTy = repeatFunc.getFunctionType();
auto sourceFile = fir::factory::locationToFilename(builder, loc);
auto sourceLine =
fir::factory::locationToLineNo(builder, loc, fTy.getInput(4));
auto args = fir::runtime::createArguments(
builder, loc, fTy, resultBox, stringBox, ncopies, sourceFile, sourceLine);
builder.create<fir::CallOp>(loc, repeatFunc, args);
}
void fir::runtime::genTrim(fir::FirOpBuilder &builder, mlir::Location loc,
mlir::Value resultBox, mlir::Value stringBox) {
auto trimFunc = fir::runtime::getRuntimeFunc<mkRTKey(Trim)>(loc, builder);
auto fTy = trimFunc.getFunctionType();
auto sourceFile = fir::factory::locationToFilename(builder, loc);
auto sourceLine =
fir::factory::locationToLineNo(builder, loc, fTy.getInput(3));
auto args = fir::runtime::createArguments(builder, loc, fTy, resultBox,
stringBox, sourceFile, sourceLine);
builder.create<fir::CallOp>(loc, trimFunc, args);
}
void fir::runtime::genScanDescriptor(fir::FirOpBuilder &builder,
mlir::Location loc, mlir::Value resultBox,
mlir::Value stringBox, mlir::Value setBox,
mlir::Value backBox, mlir::Value kind) {
auto func = fir::runtime::getRuntimeFunc<mkRTKey(Scan)>(loc, builder);
genCharacterSearch(func, builder, loc, resultBox, stringBox, setBox, backBox,
kind);
}
mlir::Value fir::runtime::genScan(fir::FirOpBuilder &builder,
mlir::Location loc, int kind,
mlir::Value stringBase, mlir::Value stringLen,
mlir::Value setBase, mlir::Value setLen,
mlir::Value back) {
mlir::func::FuncOp func;
switch (kind) {
case 1:
func = fir::runtime::getRuntimeFunc<mkRTKey(Scan1)>(loc, builder);
break;
case 2:
func = fir::runtime::getRuntimeFunc<mkRTKey(Scan2)>(loc, builder);
break;
case 4:
func = fir::runtime::getRuntimeFunc<mkRTKey(Scan4)>(loc, builder);
break;
default:
fir::emitFatalError(
loc, "unsupported CHARACTER kind value. Runtime expects 1, 2, or 4.");
}
auto fTy = func.getFunctionType();
auto args = fir::runtime::createArguments(builder, loc, fTy, stringBase,
stringLen, setBase, setLen, back);
return builder.create<fir::CallOp>(loc, func, args).getResult(0);
}
void fir::runtime::genVerifyDescriptor(fir::FirOpBuilder &builder,
mlir::Location loc,
mlir::Value resultBox,
mlir::Value stringBox,
mlir::Value setBox, mlir::Value backBox,
mlir::Value kind) {
auto func = fir::runtime::getRuntimeFunc<mkRTKey(Verify)>(loc, builder);
genCharacterSearch(func, builder, loc, resultBox, stringBox, setBox, backBox,
kind);
}
mlir::Value fir::runtime::genVerify(fir::FirOpBuilder &builder,
mlir::Location loc, int kind,
mlir::Value stringBase,
mlir::Value stringLen, mlir::Value setBase,
mlir::Value setLen, mlir::Value back) {
mlir::func::FuncOp func;
switch (kind) {
case 1:
func = fir::runtime::getRuntimeFunc<mkRTKey(Verify1)>(loc, builder);
break;
case 2:
func = fir::runtime::getRuntimeFunc<mkRTKey(Verify2)>(loc, builder);
break;
case 4:
func = fir::runtime::getRuntimeFunc<mkRTKey(Verify4)>(loc, builder);
break;
default:
fir::emitFatalError(
loc, "unsupported CHARACTER kind value. Runtime expects 1, 2, or 4.");
}
auto fTy = func.getFunctionType();
auto args = fir::runtime::createArguments(builder, loc, fTy, stringBase,
stringLen, setBase, setLen, back);
return builder.create<fir::CallOp>(loc, func, args).getResult(0);
}
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