Felix Programming Language

Tags : LLVM : August 2009

LLVM code generator support for flxc

posted on August 27, 2009 - 04:03 PM PDT by Erick Tryzelaar
filed under: Felix, LLVM

I've just committed a LLVM code generator for flxc.

#!build/debug/bin/flxc -I build/debug/lib --import nugram.flxh --import flx.flxh
>>> type int = "int";
... BOUND SYM:     type int<3> = "int";
>>> fun add : int*int -> int = "%add";
... BOUND SYM:     fun add<4>: int<3>^2 -> int<3> = "%add";
>>> fun foo (a:int, b:int, c:int) = { val d = a + b; return d + 1; }
... BOUND SYM:     fun foo<5>(val a<8>: int<3>,val b<9>: int<3>,val c<10>: int<3>): int<3>{
...   d<7> := (add<4> (a<8>, b<9>));
...   return (add<4> (d<7>, 1));}
>>> val x = 1;
... BOUND SYM:     val x<11>: int<3>;
... BOUND EXE:     x<11> := 1;
>>> val y = 2;
... BOUND SYM:     val y<12>: int<3>;
... BOUND EXE:     y<12> := 2;
>>> val z = foo (x, y, 3);
... BOUND SYM:     val z<13>: int<3>;
... BOUND EXE:     z<13> := (foo<5> (x<11>, y<12>, 3));
>>> ^D

And here's what it generates:

define void @__init__() {
entry:
  %z = alloca i32                                 ; <i32*> [#uses=1]
  %y = alloca i32                                 ; <i32*> [#uses=1]
  %x = alloca i32                                 ; <i32*> [#uses=1]
  store i32 1, i32* %x
  store i32 2, i32* %y
  %foo = call i32 @foo(i32 1, i32 2, i32 3)       ; <i32> [#uses=1]
  store i32 %foo, i32* %z
  ret void
}

define i32 @foo(i32 %a, i32 %b, i32 %c) {
entry:
  %d = alloca i32                                 ; <i32*> [#uses=1]
  %add = add i32 %a, %b                           ; <i32> [#uses=2]
  store i32 %add, i32* %d
  %add1 = add i32 %add, 1                         ; <i32> [#uses=1]
  ret i32 %add1
}

Of course it doesn't actually execute the commands yet, but the output's so pretty!

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