xref: /llvm-project/llvm/test/Instrumentation/MemorySanitizer/Mips/vararg-mips64el.ll (revision debfd7b0b44d8eb0bfe9f69933251a67f752f0b5) 
1; RUN: opt < %s -S -passes=msan 2>&1 | FileCheck %s
2
3target datalayout = "e-m:m-i8:8:32-i16:16:32-i64:64-n32:64-S128"
4target triple = "mips64el--linux"
5
6define i32 @foo(i32 %guard, ...) {
7  %vl = alloca ptr, align 8
8  call void @llvm.lifetime.start.p0(i64 32, ptr %vl)
9  call void @llvm.va_start(ptr %vl)
10  call void @llvm.va_end(ptr %vl)
11  call void @llvm.lifetime.end.p0(i64 32, ptr %vl)
12  ret i32 0
13}
14
15; First, check allocation of the save area.
16
17; CHECK-LABEL: @foo
18; CHECK: [[A:%.*]] = load {{.*}} @__msan_va_arg_overflow_size_tls
19; CHECK: [[C:%.*]] = alloca {{.*}} [[A]]
20
21; CHECK: call void @llvm.memset.p0.i64(ptr align 8 [[C]], i8 0, i64 [[A]], i1 false)
22
23; CHECK: [[D:%.*]] = call i64 @llvm.umin.i64(i64 [[A]], i64 800)
24; CHECK: call void @llvm.memcpy.p0.p0.i64(ptr align 8 [[C]], ptr align 8 @__msan_va_arg_tls, i64 [[D]], i1 false)
25
26declare void @llvm.lifetime.start.p0(i64, ptr nocapture) #1
27declare void @llvm.va_start(ptr) #2
28declare void @llvm.va_end(ptr) #2
29declare void @llvm.lifetime.end.p0(i64, ptr nocapture) #1
30
31define i32 @bar() {
32  %1 = call i32 (i32, ...) @foo(i32 0, i32 1, i64 2, double 3.000000e+00)
33  ret i32 %1
34}
35
36; Save the incoming shadow value from the arguments in the __msan_va_arg_tls
37; array.
38; CHECK-LABEL: @bar
39; CHECK: store i32 0, ptr @__msan_va_arg_tls, align 8
40; CHECK: store i64 0, ptr inttoptr (i64 add (i64 ptrtoint (ptr @__msan_va_arg_tls to i64), i64 8) to ptr), align 8
41; CHECK: store i64 0, ptr inttoptr (i64 add (i64 ptrtoint (ptr @__msan_va_arg_tls to i64), i64 16) to ptr), align 8
42; CHECK: store {{.*}} 24, {{.*}} @__msan_va_arg_overflow_size_tls
43
44; Check multiple fixed arguments.
45declare i32 @foo2(i32 %g1, i32 %g2, ...)
46define i32 @bar2() {
47  %1 = call i32 (i32, i32, ...) @foo2(i32 0, i32 1, i64 2, double 3.000000e+00)
48  ret i32 %1
49}
50
51; CHECK-LABEL: @bar2
52; CHECK: store i64 0, ptr @__msan_va_arg_tls, align 8
53; CHECK: store i64 0, ptr inttoptr (i64 add (i64 ptrtoint (ptr @__msan_va_arg_tls to i64), i64 8) to ptr), align 8
54; CHECK: store {{.*}} 16, {{.*}} @__msan_va_arg_overflow_size_tls
55
56; Test that MSan doesn't generate code overflowing __msan_va_arg_tls when too many arguments are
57; passed to a variadic function.
58define dso_local i64 @many_args() {
59entry:
60  %ret = call i64 (i64, ...) @sum(i64 120,
61    i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
62    i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
63    i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
64    i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
65    i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
66    i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
67    i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
68    i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
69    i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
70    i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
71    i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
72    i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1
73  )
74  ret i64 %ret
75}
76
77; If the size of __msan_va_arg_tls changes the second argument of `add` must also be changed.
78; CHECK-LABEL: @many_args
79; CHECK: i64 add (i64 ptrtoint (ptr @__msan_va_arg_tls to i64), i64 792)
80; CHECK-NOT: i64 add (i64 ptrtoint (ptr @__msan_va_arg_tls to i64), i64 800)
81declare i64 @sum(i64 %n, ...)
82