Update aosp/master LLVM for rebase to r230699.

[android-x86/external-llvm.git] / test / Instrumentation / MemorySanitizer / check-constant-shadow.ll

diff --git a/test/Instrumentation/MemorySanitizer/check-constant-shadow.ll b/test/Instrumentation/MemorySanitizer/check-constant-shadow.ll
index 11e4410..f147944 100644 (file)
--- 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