xref: /aosp_15_r20/external/llvm/test/Instrumentation/AddressSanitizer/instrument-dynamic-allocas.ll (revision 9880d6810fe72a1726cb53787c6711e909410d58) 
1*9880d681SAndroid Build Coastguard Worker; Test asan internal compiler flags:
2*9880d681SAndroid Build Coastguard Worker;   -asan-instrument-allocas=1
3*9880d681SAndroid Build Coastguard Worker
4*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -asan -asan-module -asan-instrument-allocas=1 -S | FileCheck %s --check-prefix=CHECK-ALLOCA
5*9880d681SAndroid Build Coastguard Workertarget 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"
6*9880d681SAndroid Build Coastguard Workertarget triple = "x86_64-unknown-linux-gnu"
7*9880d681SAndroid Build Coastguard Worker
8*9880d681SAndroid Build Coastguard Workerdefine void @foo(i32 %len) sanitize_address {
9*9880d681SAndroid Build Coastguard Workerentry:
10*9880d681SAndroid Build Coastguard Worker; CHECK-ALLOCA-LABEL: define void @foo
11*9880d681SAndroid Build Coastguard Worker; CHECK-ALLOCA: __asan_alloca_poison
12*9880d681SAndroid Build Coastguard Worker; CHECK-ALLOCA: __asan_allocas_unpoison
13*9880d681SAndroid Build Coastguard Worker; CHECK-ALLOCA: ret void
14*9880d681SAndroid Build Coastguard Worker  %0 = alloca i32, align 4
15*9880d681SAndroid Build Coastguard Worker  %1 = alloca i8*
16*9880d681SAndroid Build Coastguard Worker  store volatile i32 %len, i32* %0, align 4
17*9880d681SAndroid Build Coastguard Worker  %2 = load i32, i32* %0, align 4
18*9880d681SAndroid Build Coastguard Worker  %3 = zext i32 %2 to i64
19*9880d681SAndroid Build Coastguard Worker  %4 = alloca i8, i64 %3, align 32
20*9880d681SAndroid Build Coastguard Worker  store volatile i8 0, i8* %4
21*9880d681SAndroid Build Coastguard Worker  ret void
22*9880d681SAndroid Build Coastguard Worker}
23*9880d681SAndroid Build Coastguard Worker
24*9880d681SAndroid Build Coastguard Worker; Test that dynamic alloca is not used for inalloca variables.
25*9880d681SAndroid Build Coastguard Workerdefine void @has_inalloca() uwtable sanitize_address {
26*9880d681SAndroid Build Coastguard Worker; CHECK-ALLOCA-LABEL: define void @has_inalloca
27*9880d681SAndroid Build Coastguard Worker; CHECK-ALLOCA-NOT: __asan_alloca_poison
28*9880d681SAndroid Build Coastguard Worker; CHECK-ALLOCA-NOT: __asan_alloca_unpoison
29*9880d681SAndroid Build Coastguard Worker; CHECK-ALLOCA: ret void
30*9880d681SAndroid Build Coastguard Workerentry:
31*9880d681SAndroid Build Coastguard Worker  %t = alloca inalloca i32
32*9880d681SAndroid Build Coastguard Worker  store i32 42, i32* %t
33*9880d681SAndroid Build Coastguard Worker  call void @pass_inalloca(i32* inalloca %t)
34*9880d681SAndroid Build Coastguard Worker  ret void
35*9880d681SAndroid Build Coastguard Worker}
36*9880d681SAndroid Build Coastguard Worker
37*9880d681SAndroid Build Coastguard Workerdeclare void @pass_inalloca(i32* inalloca)
38