[msan] Stop propagating shadow in blacklisted functions.

[oota-llvm.git] / test / Instrumentation / MemorySanitizer / msan_basic.ll

diff --git a/test/Instrumentation/MemorySanitizer/msan_basic.ll b/test/Instrumentation/MemorySanitizer/msan_basic.ll
index 6b71310c61d60373da08e84a2d1b7f5cde5fab95..5814f787902affd22d4273292aabb55fad148e6d 100644 (file)
--- a/test/Instrumentation/MemorySanitizer/msan_basic.ll
+++ b/test/Instrumentation/MemorySanitizer/msan_basic.ll
@@ -651,7 +651,7 @@ define void @VACopy(i8* %p1, i8* %p2) nounwind uwtable sanitize_memory {
 declare void @llvm.va_start(i8*) nounwind
 
 ; Function Attrs: nounwind uwtable
-define void @VAStart(i32 %x, ...) {
+define void @VAStart(i32 %x, ...) sanitize_memory {
 entry:
   %x.addr = alloca i32, align 4
   %va = alloca [1 x %struct.__va_list_tag], align 16
@@ -683,7 +683,7 @@ entry:
 ; CHECK: ret void
 
 
-; Test that checks are omitted but shadow propagation is kept if
+; Test that checks are omitted and returned value is always initialized if
 ; sanitize_memory attribute is missing.
 
 define i32 @NoSanitizeMemory(i32 %x) uwtable {
@@ -703,9 +703,7 @@ declare void @bar()
 
 ; CHECK: @NoSanitizeMemory
 ; CHECK-NOT: @__msan_warning
-; CHECK: load i32* {{.*}} @__msan_param_tls
-; CHECK-NOT: @__msan_warning
-; CHECK: store {{.*}} @__msan_retval_tls
+; CHECK: store i32 0, {{.*}} @__msan_retval_tls
 ; CHECK-NOT: @__msan_warning
 ; CHECK: ret i32
 
@@ -825,3 +823,17 @@ entry:
 ; CHECK: store i64 16, i64* @__msan_va_arg_overflow_size_tls
 ; CHECK: call void (i32, ...)* @VAArgStructFn
 ; CHECK: ret void
+
+declare i32 @InnerTailCall(i32 %a)
+
+define void @MismatchedReturnTypeTailCall(i32 %a) sanitize_memory {
+  %b = tail call i32 @InnerTailCall(i32 %a)
+  ret void
+}
+
+; We used to strip off the 'tail' modifier, but now that we unpoison return slot
+; shadow before the call, we don't need to anymore.
+
+; CHECK-LABEL: define void @MismatchedReturnTypeTailCall
+; CHECK: tail call i32 @InnerTailCall
+; CHECK: ret void