1 ; RUN: opt < %s -asan -asan-module -asan-use-after-return -S | FileCheck --check-prefix=CHECK-UAR %s
2 ; RUN: opt < %s -asan -asan-module -asan-use-after-return=0 -S | FileCheck --check-prefix=CHECK-PLAIN %s
3 target datalayout = "e-i64:64-f80:128-s:64-n8:16:32:64-S128"
4 target triple = "x86_64-unknown-linux-gnu"
8 define void @Bar() uwtable sanitize_address {
10 ; CHECK-PLAIN-LABEL: Bar
11 ; CHECK-PLAIN-NOT: label
12 ; CHECK-PLAIN: ret void
14 ; CHECK-UAR-LABEL: Bar
15 ; CHECK-UAR: load i32* @__asan_option_detect_stack_use_after_return
17 ; CHECK-UAR: call i64 @__asan_stack_malloc_1
19 ; CHECK-UAR: call void @Foo
20 ; If LocalStackBase != OrigStackBase
22 ; Then Block: poison the entire frame.
23 ; CHECK-UAR: store i64 -723401728380766731
24 ; CHECK-UAR: store i64 -723401728380766731
25 ; CHECK-UAR: store i8 0
26 ; CHECK-UAR-NOT: store
28 ; Else Block: no UAR frame. Only unpoison the redzones.
29 ; CHECK-UAR: store i64 0
30 ; CHECK-UAR: store i32 0
31 ; CHECK-UAR-NOT: store
33 ; Done, no more stores.
34 ; CHECK-UAR-NOT: store
37 %x = alloca [20 x i8], align 16
38 %arraydecay = getelementptr inbounds [20 x i8], [20 x i8]* %x, i64 0, i64 0
39 call void @Foo(i8* %arraydecay)