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; RUN: llc -mtriple=x86_64 < %s
declare ptr @llvm_gc_allocate(i32)
declare void @llvm_gc_initialize(i32)
declare void @llvm.gcroot(ptr, ptr)
declare void @llvm.gcwrite(ptr, ptr, ptr)
define i32 @main() gc "shadow-stack" {
entry:
%A = alloca ptr
%B = alloca ptr
call void @llvm_gc_initialize(i32 1048576) ; Start with 1MB heap
;; ptr A;
call void @llvm.gcroot(ptr %A, ptr null)
;; A = gcalloc(10);
%Aptr = call ptr @llvm_gc_allocate(i32 10)
store ptr %Aptr, ptr %A
;; ptr B;
call void @llvm.gcroot(ptr %B, ptr null)
;; B = gcalloc(4);
%B.upgrd.1 = call ptr @llvm_gc_allocate(i32 8)
store ptr %B.upgrd.1, ptr %B
;; *B = A;
%B.1 = load ptr, ptr %B
%A.1 = load ptr, ptr %A
call void @llvm.gcwrite(ptr %A.1, ptr %B.upgrd.1, ptr %B.1)
br label %AllocLoop
AllocLoop:
%i = phi i32 [ 0, %entry ], [ %indvar.next, %AllocLoop ]
;; Allocated mem: allocated memory is immediately dead.
call ptr @llvm_gc_allocate(i32 100)
%indvar.next = add i32 %i, 1
%exitcond = icmp eq i32 %indvar.next, 10000000
br i1 %exitcond, label %Exit, label %AllocLoop
Exit:
ret i32 0
}
declare void @__main()
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