1 ; RUN: opt < %s -S -passes=msan 2>&1 | FileCheck %s
2 ; RUN: opt < %s -msan -S | FileCheck %s
4 target datalayout = "E-m:m-i8:8:32-i16:16:32-i64:64-n32:64-S128"
5 target triple = "mips64--linux"
7 define i32 @foo(i32 %guard, ...) {
8 %vl = alloca i8*, align 8
9 %1 = bitcast i8** %vl to i8*
10 call void @llvm.lifetime.start.p0i8(i64 32, i8* %1)
11 call void @llvm.va_start(i8* %1)
12 call void @llvm.va_end(i8* %1)
13 call void @llvm.lifetime.end.p0i8(i64 32, i8* %1)
17 ; First, check allocation of the save area.
20 ; CHECK: [[A:%.*]] = load {{.*}} @__msan_va_arg_overflow_size_tls
21 ; CHECK: [[B:%.*]] = add i64 0, [[A]]
22 ; CHECK: [[C:%.*]] = alloca {{.*}} [[B]]
24 ; CHECK: [[STACK:%.*]] = bitcast {{.*}} @__msan_va_arg_tls to i8*
25 ; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 [[C]], i8* align 8 [[STACK]], i64 [[B]], i1 false)
27 declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1
28 declare void @llvm.va_start(i8*) #2
29 declare void @llvm.va_end(i8*) #2
30 declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1
33 %1 = call i32 (i32, ...) @foo(i32 0, i32 1, i64 2, double 3.000000e+00)
37 ; Save the incoming shadow value from the arguments in the __msan_va_arg_tls
38 ; array. The first argument is stored at position 4, since it's right
41 ; CHECK: store i32 0, i32* inttoptr (i64 add (i64 ptrtoint ([100 x i64]* @__msan_va_arg_tls to i64), i64 4) to i32*), align 8
42 ; CHECK: store i64 0, i64* inttoptr (i64 add (i64 ptrtoint ([100 x i64]* @__msan_va_arg_tls to i64), i64 8) to i64*), align 8
43 ; CHECK: store i64 0, i64* inttoptr (i64 add (i64 ptrtoint ([100 x i64]* @__msan_va_arg_tls to i64), i64 16) to i64*), align 8
44 ; CHECK: store {{.*}} 24, {{.*}} @__msan_va_arg_overflow_size_tls
46 ; Check multiple fixed arguments.
47 declare i32 @foo2(i32 %g1, i32 %g2, ...)
49 %1 = call i32 (i32, i32, ...) @foo2(i32 0, i32 1, i64 2, double 3.000000e+00)
54 ; CHECK: store i64 0, i64* getelementptr inbounds ([100 x i64], [100 x i64]* @__msan_va_arg_tls, i32 0, i32 0), align 8
55 ; CHECK: store i64 0, i64* inttoptr (i64 add (i64 ptrtoint ([100 x i64]* @__msan_va_arg_tls to i64), i64 8) to i64*), align 8
56 ; CHECK: store {{.*}} 16, {{.*}} @__msan_va_arg_overflow_size_tls
58 ; Test that MSan doesn't generate code overflowing __msan_va_arg_tls when too many arguments are
59 ; passed to a variadic function.
60 define dso_local i64 @many_args() {
62 %ret = call i64 (i64, ...) @sum(i64 120,
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 i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
74 i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1
79 ; If the size of __msan_va_arg_tls changes the second argument of `add` must also be changed.
80 ; CHECK-LABEL: @many_args
81 ; CHECK: i64 add (i64 ptrtoint ([100 x i64]* @__msan_va_arg_tls to i64), i64 792)
82 ; CHECK-NOT: i64 add (i64 ptrtoint ([100 x i64]* @__msan_va_arg_tls to i64), i64 800)
83 declare i64 @sum(i64 %n, ...)