[x86] Fully generalize the zext lowering in the new vector shuffle

[oota-llvm.git] / test / Other / lint.ll

diff --git a/test/Other/lint.ll b/test/Other/lint.ll
index f6787e973ed761b5f4cd66d849905023491e0aea..78bbbe9e6fa6e5a983c951fb47f71da49a9e4b10 100644 (file)
--- a/test/Other/lint.ll
+++ b/test/Other/lint.ll
@@ -9,6 +9,7 @@ declare void @has_noaliases(i32* noalias %p, i32* %q)
 declare void @one_arg(i32)
 
 @CG = constant i32 7
+@E = external global i8
 
 define i32 @foo() noreturn {
   %buf = alloca i8
@@ -79,6 +80,18 @@ define i32 @foo() noreturn {
 ; CHECK: Write to read-only memory
   call void @llvm.memcpy.p0i8.p0i8.i64(i8* bitcast (i32* @CG to i8*), i8* bitcast (i32* @CG to i8*), i64 1, i32 1, i1 0)
 
+; CHECK: Undefined behavior: Buffer overflow
+  %wider = bitcast i8* %buf to i16*
+  store i16 0, i16* %wider
+; CHECK: Undefined behavior: Buffer overflow
+  %inner = getelementptr {i8, i8}* %buf2, i32 0, i32 1
+  %wider2 = bitcast i8* %inner to i16*
+  store i16 0, i16* %wider2
+; CHECK: Undefined behavior: Buffer overflow
+  %before = getelementptr i8* %buf, i32 -1
+  %wider3 = bitcast i8* %before to i16*
+  store i16 0, i16* %wider3
+
   br label %next
 
 next:
@@ -88,6 +101,10 @@ next:
   ret i32 0
 
 foo:
+; CHECK-NOT: Undefined behavior: Buffer overflow
+; CHECK-NOT: Memory reference address is misaligned
+  %e = bitcast i8* @E to i64*
+  store i64 0, i64* %e
   %z = add i32 0, 0
 ; CHECK: unreachable immediately preceded by instruction without side effects
   unreachable