LFortran Development Status

This page documents what Fortran features are supported by LFortran. For each feature we list a short description, the filename with the test and current status for each parts of the compiler:

• AST: The code can be parsed to AST (lfortran --show-ast test.f90)

• ASR: The code can be transformed to ASR (lfortran --show-asr test.f90)

• LLVM: LFortran can generate LLVM IR (lfortran --show-llvm test.f90)

• BIN: The LLVM IR can compile to a binary

• RUN: The binary runs without errors

If all are green it means the feature fully works and you can use it in your codes. Otherwise you can see what the status is of each feature.

This page is generated automatically using the Compiler Tester repository which contains all the Fortran tests and scripts to run LFortran to produce the tables below. We are looking for contributors to contribute more tests. Our goal is to have a comprehensive Fortran testsuite that can be used to test any Fortran compiler.

Testing the LFortran compiler version:

$ lfortran --version
LFortran version: 0.12.0-491-gaf48ff273
Platform: macOS
Default target: x86_64-apple-darwin20.3.0

Topics

Full programs that compute something interesting

Basic Numerics

Directory: tests/programs/numerics

Description	AST	ASR	LLVM	BIN	RUN	Filename
Pure Fortran sin(x) implementation	✅	✅	✅	✅	✅	t01_sin_implementation.f90

Modules

Basic Usage

Directory: tests/modules/basic

Description	AST	ASR	LLVM	BIN	RUN	Filename
Basic modules	✅	✅	✅	✅	✅	t01.f90

Module Functions and Subroutines

Directory: tests/modules/procedures

Description	AST	ASR	LLVM	BIN	RUN	Filename
Module functions	✅	✅	✅	✅	✅	t01.f90
Module subroutines	✅	✅	✅	✅	✅	t02.f90
Nested subroutines	✅	✅	✅	✅	✅	t03.f90

Expressions

Arithmetic Operations

Directory: tests/expressions/arit

Description	AST	ASR	LLVM	BIN	RUN	Filename
+,-,*,/,**	✅	✅	✅	✅	✅	basic_operations.f90

Integers

Directory: tests/expressions/integers

Description	AST	ASR	LLVM	BIN	RUN	Filename
integers	✅	✅	✅	✅	✅	integer_kind.f90
relational operations	✅	✅	✅	✅	✅	t01_rel_operations.f90
logical operations	✅	✅	✅	✅	✅	t02_logical_operations.f90

Real Numbers

Directory: tests/expressions/reals

Description	AST	ASR	LLVM	BIN	RUN	Filename
single/double reals	✅	✅	✅	✅	✅	real_kind.f90
defined operator	✅	❌	❌	❌	❌	t01_def_op.f90

Complex Numbers

Directory: tests/expressions/complex

Description	AST	ASR	LLVM	BIN	RUN	Filename
single/double complex	✅	✅	✅	✅	✅	complex_kind.f90

Strings

Directory: tests/expressions/character

Description	AST	ASR	LLVM	BIN	RUN	Filename
character	✅	✅	✅	✅	✅	t01_character.f90
string concatenation	✅	✅	✅	✅	✅	t02_concat_operation.f90

Derived Types

Directory: tests/expressions/derived_type

Description	AST	ASR	LLVM	BIN	RUN	Filename
basic derived types	✅	✅	✅	✅	✅	t01_derived_type.f90

Statements

Allocate Statement

Directory: tests/statements/allocate

Description	AST	ASR	LLVM	BIN	RUN	Filename
allocate statement	✅	✅	✅	✅	✅	t01.f90

Block Statement

Directory: tests/statements/block

Description	AST	ASR	LLVM	BIN	RUN	Filename
block statement	✅	❌	❌	❌	❌	t01.f90

Goto Statement

Directory: tests/statements/goto

Description	AST	ASR	LLVM	BIN	RUN	Filename
computed go-to statement	✅	❌	❌	❌	❌	t01.f90
go-to statement	✅	❌	❌	❌	❌	t02.f90

If Statement

Directory: tests/statements/if

Description	AST	ASR	LLVM	BIN	RUN	Filename
Test .false.	✅	✅	✅	✅	✅	if_01.f90
single line if statement	✅	✅	✅	✅	✅	if_02.f90
multi line if statement	✅	✅	✅	✅	✅	if_03.f90
nested if statements	✅	✅	✅	✅	✅	if_04.f90

While Statement

Directory: tests/statements/while

Description	AST	ASR	LLVM	BIN	RUN	Filename
Simple while loops	✅	✅	✅	✅	✅	while_01.f90
exit / cycle in while loops	✅	✅	✅	✅	✅	while_02.f90

Print Statement

Directory: tests/statements/print

Description	AST	ASR	LLVM	BIN	RUN	Filename
Basic print	✅	✅	✅	✅	✅	t01.f90

Open, Read, Write, Close Statement

Directory: tests/statements/file_io

Description	AST	ASR	LLVM	BIN	RUN	Filename
open/read/write/close	✅	✅	❌	❌	❌	t01.f90

Intrinsic Functions

abs

Directory: tests/intrinsic/abs

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	✅	✅	✅	✅	t01_scalar_real.f90
scalar single/double complex	✅	❌	❌	❌	❌	t02_scalar_complex.f90
array 1D single/double real	✅	✅	❌	❌	❌	t03_array1d_real.f90

exp

Directory: tests/intrinsic/exp

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	✅	✅	✅	✅	t01_scalar_real.f90
scalar single/double complex	✅	✅	✅	✅	✅	t02_scalar_complex.f90
array 1D single/double real	✅	✅	❌	❌	❌	t03_array1d_real.f90

log

Directory: tests/intrinsic/log

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	✅	✅	✅	✅	t01_scalar_real.f90
scalar single/double complex	✅	✅	✅	✅	✅	t02_scalar_complex.f90
array 1D single/double real	✅	✅	❌	❌	❌	t03_array1d_real.f90

sqrt

Directory: tests/intrinsic/sqrt

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	✅	✅	✅	✅	t01_scalar_real.f90
scalar single/double complex	✅	❌	❌	❌	❌	t02_scalar_complex.f90
array 1D single/double real	✅	✅	❌	❌	❌	t03_array1d_real.f90

sin

Directory: tests/intrinsic/sin

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	✅	✅	✅	✅	t01_scalar_real.f90
scalar single/double complex	✅	❌	❌	❌	❌	t02_scalar_complex.f90
array 1D single/double real	✅	✅	❌	❌	❌	t03_array1d_real.f90

cos

Directory: tests/intrinsic/cos

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	✅	✅	✅	✅	t01_scalar_real.f90
scalar single/double complex	✅	✅	✅	✅	✅	t02_scalar_complex.f90
array 1D single/double real	✅	✅	❌	❌	❌	t03_array1d_real.f90

tan

Directory: tests/intrinsic/tan

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	✅	✅	✅	✅	t01_scalar_real.f90
scalar single/double complex	✅	✅	✅	✅	✅	t02_scalar_complex.f90
array 1D single/double real	✅	✅	❌	❌	❌	t03_array1d_real.f90

sinh

Directory: tests/intrinsic/sinh

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	✅	✅	✅	✅	t01_scalar_real.f90
scalar single/double complex	✅	✅	✅	✅	✅	t02_scalar_complex.f90
array 1D single/double real	✅	✅	❌	❌	❌	t03_array1d_real.f90

cosh

Directory: tests/intrinsic/cosh

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	✅	✅	✅	✅	t01_scalar_real.f90
scalar single/double complex	✅	✅	✅	✅	✅	t02_scalar_complex.f90
array 1D single/double real	✅	✅	❌	❌	❌	t03_array1d_real.f90

tanh

Directory: tests/intrinsic/tanh

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	✅	✅	✅	✅	t01_scalar_real.f90
scalar single/double complex	✅	✅	✅	✅	✅	t02_scalar_complex.f90
array 1D single/double real	✅	✅	❌	❌	❌	t03_array1d_real.f90

asin

Directory: tests/intrinsic/asin

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	✅	✅	✅	✅	t01_scalar_real.f90
scalar single/double complex	✅	✅	✅	✅	✅	t02_scalar_complex.f90
array 1D single/double real	✅	✅	❌	❌	❌	t03_array1d_real.f90

acos

Directory: tests/intrinsic/acos

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	✅	✅	✅	✅	t01_scalar_real.f90
scalar single/double complex	✅	✅	✅	✅	✅	t02_scalar_complex.f90
array 1D single/double real	✅	✅	❌	❌	❌	t03_array1d_real.f90

atan

Directory: tests/intrinsic/atan

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	✅	✅	✅	✅	t01_scalar_real.f90
scalar single/double complex	✅	✅	✅	✅	✅	t02_scalar_complex.f90
array 1D single/double real	✅	✅	❌	❌	❌	t03_array1d_real.f90

modulo

Directory: tests/intrinsic/modulo

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	❌	❌	❌	❌	t01_scalar_real.f90
array 1D single/double real	✅	✅	❌	❌	❌	t03_array1d_real.f90

mod

Directory: tests/intrinsic/mod

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	❌	❌	❌	❌	t01_scalar_real.f90
array 1D single/double real	✅	❌	❌	❌	❌	t03_array1d_real.f90

min

Directory: tests/intrinsic/min

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	✅	❌	❌	❌	t01_scalar_real.f90

max

Directory: tests/intrinsic/max

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	✅	❌	❌	❌	t01_scalar_real.f90

int

Directory: tests/intrinsic/int

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	❌	❌	❌	❌	t01_scalar_real.f90

real

Directory: tests/intrinsic/real

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	✅	✅	✅	✅	t01_scalar_real.f90

floor

Directory: tests/intrinsic/floor

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	❌	❌	❌	❌	t01_scalar_real.f90

nint

Directory: tests/intrinsic/nint

Description	AST	ASR	LLVM	BIN	RUN	Filename
scalar single/double real	✅	❌	❌	❌	❌	t01_scalar_real.f90