[llvm] r308251 - Add element-atomic mem intrinsic canary tests for Memory Sanitizer.

[Daniel Neilson via llvm-commits]

Author: dneilson
Date: Mon Jul 17 18:06:54 2017
New Revision: 308251

URL: http://llvm.org/viewvc/llvm-project?rev=308251&view=rev
Log:
Add element-atomic mem intrinsic canary tests for Memory Sanitizer.

Summary:
Add canary tests to verify that MSAN currently does nothing with the element atomic memory intrinsics for memcpy, memmove, and memset.

Placeholder tests that will fail once element atomic @llvm.mem[cpy|move|set] instrinsics have been added to the MemIntrinsic class hierarchy. These will act as a reminder to verify that MSAN handles these intrinsics properly once they have been added to that class hierarchy.

Reviewers: reames

Reviewed By: reames

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D35510

Modified:
    llvm/trunk/test/Instrumentation/MemorySanitizer/msan_basic.ll

Modified: llvm/trunk/test/Instrumentation/MemorySanitizer/msan_basic.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Instrumentation/MemorySanitizer/msan_basic.ll?rev=308251&r1=308250&r2=308251&view=diff
==============================================================================
--- llvm/trunk/test/Instrumentation/MemorySanitizer/msan_basic.ll (original)
+++ llvm/trunk/test/Instrumentation/MemorySanitizer/msan_basic.ll Mon Jul 17 18:06:54 2017
@@ -238,6 +238,41 @@ declare void @llvm.memmove.p0i8.p0i8.i64
 ; CHECK: call i8* @__msan_memmove
 ; CHECK: ret void
 
+;; ------------
+;; Placeholder tests that will fail once element atomic @llvm.mem[cpy|move|set] instrinsics have
+;; been added to the MemIntrinsic class hierarchy. These will act as a reminder to
+;; verify that MSAN handles these intrinsics properly once they have been
+;; added to that class hierarchy.
+declare void @llvm.memset.element.unordered.atomic.p0i8.i64(i8* nocapture writeonly, i8, i64, i32) nounwind
+declare void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i32) nounwind
+declare void @llvm.memcpy.element.unordered.atomic.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i32) nounwind
+
+define void @atomic_memcpy(i8* nocapture %x, i8* nocapture %y) nounwind {
+  ; CHECK-LABEL: atomic_memcpy
+  ; CHECK-NEXT: call void @llvm.memcpy.element.unordered.atomic.p0i8.p0i8.i64(i8* align 1 %x, i8* align 2 %y, i64 16, i32 1)
+  ; CHECK-NEXT: ret void
+  call void @llvm.memcpy.element.unordered.atomic.p0i8.p0i8.i64(i8* align 1 %x, i8* align 2 %y, i64 16, i32 1)
+  ret void
+}
+
+define void @atomic_memmove(i8* nocapture %x, i8* nocapture %y) nounwind {
+  ; CHECK-LABEL: atomic_memmove
+  ; CHECK-NEXT: call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i64(i8* align 1 %x, i8* align 2 %y, i64 16, i32 1)
+  ; CHECK-NEXT: ret void
+  call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i64(i8* align 1 %x, i8* align 2 %y, i64 16, i32 1)
+  ret void
+}
+
+define void @atomic_memset(i8* nocapture %x) nounwind {
+  ; CHECK-LABEL: atomic_memset
+  ; CHECK-NEXT: call void @llvm.memset.element.unordered.atomic.p0i8.i64(i8* align 1 %x, i8 88, i64 16, i32 1)
+  ; CHECK-NEXT: ret void
+  call void @llvm.memset.element.unordered.atomic.p0i8.i64(i8* align 1 %x, i8 88, i64 16, i32 1)
+  ret void
+}
+
+;; ------------
+
 
 ; Check that we propagate shadow for "select"