| ; RUN: opt < %s -msan -msan-check-access-address=0 -msan-check-constant-shadow=1 -msan-track-origins=1 -S | FileCheck %s |
| |
| target 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" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| ; Test that returning a literal undef from main() triggers an MSan warning. |
| |
| ; main() is special: it inserts check for the return value |
| define i32 @main() nounwind uwtable sanitize_memory { |
| entry: |
| ret i32 undef |
| } |
| |
| ; CHECK-LABEL: @main |
| ; CHECK: call void @__msan_warning_noreturn |
| ; CHECK: ret i32 undef |
| |
| |
| ; This function stores known initialized value. |
| ; Expect 2 stores: one for the shadow (0), one for the value (42), but no origin. |
| define void @StoreConstant(i32* nocapture %p) nounwind uwtable sanitize_memory { |
| entry: |
| store i32 42, i32* %p, align 4 |
| ret void |
| } |
| |
| ; CHECK-LABEL: @StoreConstant |
| ; CHECK-NOT: store i32 |
| ; CHECK: store i32 0, |
| ; CHECK-NOT: store i32 |
| ; CHECK: store i32 42, |
| ; CHECK-NOT: store i32 |
| ; CHECK: ret void |
| |
| |
| ; This function stores known uninitialized value. |
| ; Expect 3 stores: shadow, value and origin. |
| ; Expect no icmp(s): everything here is unconditional. |
| define void @StoreUndef(i32* nocapture %p) nounwind uwtable sanitize_memory { |
| entry: |
| store i32 undef, i32* %p, align 4 |
| ret void |
| } |
| |
| ; CHECK-LABEL: @StoreUndef |
| ; CHECK-NOT: icmp |
| ; CHECK: store i32 |
| ; CHECK-NOT: icmp |
| ; CHECK: store i32 |
| ; CHECK-NOT: icmp |
| ; CHECK: store i32 |
| ; CHECK-NOT: icmp |
| ; CHECK: ret void |
