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implementation
declare sbyte* %llvm_gc_allocate(uint)
declare void %llvm_gc_initialize(uint)
declare void %llvm.gcroot(sbyte**, sbyte*)
declare void %llvm.gcwrite(sbyte*, sbyte**)
int %main() {
entry:
%A = alloca sbyte*
%B = alloca sbyte**
call void %llvm_gc_initialize(uint 1048576) ; Start with 1MB heap
;; void *A;
call void %llvm.gcroot(sbyte** %A, sbyte* null)
;; A = gcalloc(10);
%Aptr = call sbyte* %llvm_gc_allocate(uint 10)
store sbyte* %Aptr, sbyte** %A
;; void **B;
%tmp.1 = cast sbyte*** %B to sbyte **
call void %llvm.gcroot(sbyte** %tmp.1, sbyte* null)
;; B = gcalloc(4);
%B = call sbyte* %llvm_gc_allocate(uint 8)
%tmp.2 = cast sbyte* %B to sbyte**
store sbyte** %tmp.2, sbyte*** %B
;; *B = A;
%B.1 = load sbyte*** %B
%A.1 = load sbyte** %A
call void %llvm.gcwrite(sbyte* %A.1, sbyte** %B.1)
br label %AllocLoop
AllocLoop:
%i = phi uint [ 0, %entry ], [ %indvar.next, %AllocLoop ]
;; Allocated mem: allocated memory is immediately dead.
call sbyte* %llvm_gc_allocate(uint 100)
%indvar.next = add uint %i, 1
%exitcond = seteq uint %indvar.next, 10000000
br bool %exitcond, label %Exit, label %AllocLoop
Exit:
ret int 0
}
declare void %__main()
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