Omtalk is a static compiler for SOM, a derivative of smalltalk. Omtalk is built with MLIR and LLVM.
Omtalk currently compiles SOM code to a high-level representation in MLIR.
Lowering to LLVM is WIP. The Omtalk runtime uses a single tagged value type,
called an !omtalk.box<?> in MLIR.
The following code:
Fibonacci = ( "defines a subclass of Object"
fib: n = ( "defines the fib method with the argument n"
^ n <= 1
ifTrue: 1
ifFalse: [ self fib: (n - 1) + (self fib: (n - 2)) ]
)
)Compiles to the MLIR code:
module {
omtalk.klass @Fibonacci : @Object {
"omtalk.method"() ( {
^bb0(%arg0: !omtalk.box<?>): // no predecessors
%0 = "omtalk.constant_int"() {value = 1 : i64} : () -> !omtalk.box<int>
%1 = "omtalk.send"(%arg0, %0) {message = @"<="} : (!omtalk.box<?>, !omtalk.box<int>) -> !omtalk.box<?>
%2 = "omtalk.constant_int"() {value = 1 : i64} : () -> !omtalk.box<int>
%3 = "omtalk.block"() ( {
%5 = "omtalk.self"() : () -> !omtalk.box<ref>
%6 = "omtalk.constant_int"() {value = 1 : i64} : () -> !omtalk.box<int>
%7 = "omtalk.send"(%arg0, %6) {message = @"-"} : (!omtalk.box<?>, !omtalk.box<int>) -> !omtalk.box<?>
%8 = "omtalk.self"() : () -> !omtalk.box<ref>
%9 = "omtalk.constant_int"() {value = 2 : i64} : () -> !omtalk.box<int>
%10 = "omtalk.send"(%arg0, %9) {message = @"-"} : (!omtalk.box<?>, !omtalk.box<int>) -> !omtalk.box<?>
%11 = "omtalk.send"(%8, %10) {message = @"fib:"} : (!omtalk.box<ref>, !omtalk.box<?>) -> !omtalk.box<?>
%12 = "omtalk.send"(%7, %11) {message = @"+"} : (!omtalk.box<?>, !omtalk.box<?>) -> !omtalk.box<?>
%13 = "omtalk.send"(%5, %12) {message = @"fib:"} : (!omtalk.box<ref>, !omtalk.box<?>) -> !omtalk.box<?>
"omtalk.return"(%13) : (!omtalk.box<?>) -> ()
}) {type = () -> !omtalk.box<?>} : () -> !omtalk.box<?>
%4 = "omtalk.send"(%1, %2, %3) {message = @"ifTrue:ifFalse:"} : (!omtalk.box<?>, !omtalk.box<int>, !omtalk.box<?>) -> !omtalk.box<?>
"omtalk.return"(%4) : (!omtalk.box<?>) -> ()
}) {sym_name = "fib:", type = (!omtalk.box<?>) -> !omtalk.box<?>} : () -> ()
}
}To build Omtalk and all tests, run:
mkdir build; cd build
cmake -G Ninja -C ../cmake/caches/dev.cmake ..
ninja
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