xref: /llvm-project/llvm/test/Instrumentation/DataFlowSanitizer/args-unreachable-bb.ll (revision ecb85b5cd89f9797c538675ee3ab93e350c57bd5) 
1; RUN: opt < %s -passes=dfsan -S | FileCheck %s
2target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
3target triple = "x86_64-unknown-linux-gnu"
4
5; CHECK-LABEL: @unreachable_bb1.dfsan
6define i8 @unreachable_bb1() {
7  ; CHECK: ret i8 1
8  ; CHECK-NOT: bb2:
9  ; CHECK-NOT: bb3:
10  ; CHECK-NOT: bb4:
11  ret i8 1
12
13bb2:
14  ret i8 2
15
16bb3:
17  br label %bb4
18
19bb4:
20  br label %bb3
21}
22
23declare void @abort() noreturn
24
25; CHECK-LABEL: @unreachable_bb2.dfsan
26define i8 @unreachable_bb2() {
27  call void @abort() noreturn
28  ; CHECK-NOT: i8 12
29  ; CHECK: unreachable
30  ret i8 12
31}
32