| ; 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() |