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Diffstat (limited to 'test/CodeGen/Generic/GC/alloc_loop.ll')
| -rw-r--r-- | test/CodeGen/Generic/GC/alloc_loop.ll | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/test/CodeGen/Generic/GC/alloc_loop.ll b/test/CodeGen/Generic/GC/alloc_loop.ll new file mode 100644 index 0000000000..fb78ba2cd1 --- /dev/null +++ b/test/CodeGen/Generic/GC/alloc_loop.ll @@ -0,0 +1,53 @@ +; RUN: llc < %s + + +declare i8* @llvm_gc_allocate(i32) +declare void @llvm_gc_initialize(i32) + +declare void @llvm.gcroot(i8**, i8*) +declare void @llvm.gcwrite(i8*, i8*, i8**) + +define i32 @main() gc "shadow-stack" { +entry: + %A = alloca i8* + %B = alloca i8** + + call void @llvm_gc_initialize(i32 1048576) ; Start with 1MB heap + + ;; void *A; + call void @llvm.gcroot(i8** %A, i8* null) + + ;; A = gcalloc(10); + %Aptr = call i8* @llvm_gc_allocate(i32 10) + store i8* %Aptr, i8** %A + + ;; void **B; + %tmp.1 = bitcast i8*** %B to i8** + call void @llvm.gcroot(i8** %tmp.1, i8* null) + + ;; B = gcalloc(4); + %B.upgrd.1 = call i8* @llvm_gc_allocate(i32 8) + %tmp.2 = bitcast i8* %B.upgrd.1 to i8** + store i8** %tmp.2, i8*** %B + + ;; *B = A; + %B.1 = load i8*** %B + %A.1 = load i8** %A + call void @llvm.gcwrite(i8* %A.1, i8* %B.upgrd.1, i8** %B.1) + + br label %AllocLoop + +AllocLoop: + %i = phi i32 [ 0, %entry ], [ %indvar.next, %AllocLoop ] + ;; Allocated mem: allocated memory is immediately dead. + call i8* @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() |