diff options
Diffstat (limited to 'test/Instrumentation/MemorySanitizer/check-constant-shadow.ll')
| -rw-r--r-- | test/Instrumentation/MemorySanitizer/check-constant-shadow.ll | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/test/Instrumentation/MemorySanitizer/check-constant-shadow.ll b/test/Instrumentation/MemorySanitizer/check-constant-shadow.ll index 11e4410..f147944 100644 --- a/test/Instrumentation/MemorySanitizer/check-constant-shadow.ll +++ b/test/Instrumentation/MemorySanitizer/check-constant-shadow.ll @@ -1,10 +1,11 @@ -; RUN: opt < %s -msan -msan-check-constant-shadow=1 -S | FileCheck %s +; 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 @@ -13,3 +14,40 @@ entry: ; 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 |