ton/crypto/func/auto-tests/tests/remove-unused-functions.fc

#pragma remove-unused-functions;

int unused1() { return 2; }
int unused2() { return unused1(); }
int unused3(int x) { return x * 2 + unused2(); }

int used_from_noncall1() { return 10; }
int used_as_noncall1() { return used_from_noncall1(); }

const int int20 = 20;
int used_from_noncall2() { return int20; }
int used_as_noncall2() { return 0 * 0 + used_from_noncall2() + (0 << 0); }

global int unused_gv;
global _ used_gv;

(() -> int) receiveGetter() { return used_as_noncall2; }

(int) usedButOptimizedOut(int x) pure { return x + 2; }

(int, int, int) main() {
    used_gv = 1;
    used_gv = used_gv + 2;
    var getter1 = used_as_noncall1;
    var getter2 = receiveGetter();
    usedButOptimizedOut(used_gv);
    return (used_gv, getter1(), getter2());
}

{-
TESTCASE | 0 | | 3 10 20

@fif_codegen DECLPROC used_as_noncall1
@fif_codegen DECLGLOBVAR used_gv

@fif_codegen_avoid DECLPROC unused1
@fif_codegen_avoid DECLPROC unused2
@fif_codegen_avoid DECLPROC unused3
@fif_codegen_avoid DECLGLOBVAR unused_gv

Note, that `usedButOptimizedOut()` (a pure function which result is unused)
is currently codegenerated, since it's formally reachable.
This is because optimizing code is a moment of codegen for now (later than marking unused symbols).

@fif_codegen DECLPROC usedButOptimizedOut
@fif_codegen_avoid usedButOptimizedOut CALLDICT
-}