1; Test asan internal compiler flags:
2;   -asan-instrument-allocas=1
3
4; RUN: opt < %s -asan -asan-module -asan-instrument-allocas=1 -S | FileCheck %s --check-prefix=CHECK-ALLOCA
5target 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"
6target triple = "x86_64-unknown-linux-gnu"
7
8define void @foo(i32 %len) sanitize_address {
9entry:
10; CHECK-ALLOCA-LABEL: define void @foo
11; CHECK-ALLOCA: __asan_alloca_poison
12; CHECK-ALLOCA: __asan_allocas_unpoison
13; CHECK-ALLOCA: ret void
14  %0 = alloca i32, align 4
15  %1 = alloca i8*
16  store volatile i32 %len, i32* %0, align 4
17  %2 = load i32, i32* %0, align 4
18  %3 = zext i32 %2 to i64
19  %4 = alloca i8, i64 %3, align 32
20  store volatile i8 0, i8* %4
21  ret void
22}
23
24; Test that dynamic alloca is not used for inalloca variables.
25define void @has_inalloca() uwtable sanitize_address {
26; CHECK-ALLOCA-LABEL: define void @has_inalloca
27; CHECK-ALLOCA-NOT: __asan_alloca_poison
28; CHECK-ALLOCA-NOT: __asan_alloca_unpoison
29; CHECK-ALLOCA: ret void
30entry:
31  %t = alloca inalloca i32
32  store i32 42, i32* %t
33  call void @pass_inalloca(i32* inalloca %t)
34  ret void
35}
36
37declare void @pass_inalloca(i32* inalloca)
38