[msan] Fix handling of equality comparison of pointer vectors.

Also improve test coveration of the handling of relational comparisons.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172539 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 70 insertions, 0 deletions

diff --git a/test/Instrumentation/MemorySanitizer/msan_basic.ll b/test/Instrumentation/MemorySanitizer/msan_basic.ll
index cd90f88..d62ebfe 100644
--- a/test/Instrumentation/MemorySanitizer/msan_basic.ll
+++ b/test/Instrumentation/MemorySanitizer/msan_basic.ll
@@ -362,6 +362,76 @@ define zeroext i1 @ICmpSLE(i32 %x) nounwind uwtable readnone {
 ; CHECK: ret i1
 
 
+; Check that we propagate shadow for x<0, x>=0, etc (i.e. sign bit tests)
+; of the vector arguments.
+
+define <2 x i1> @ICmpSLT_vector(<2 x i32*> %x) nounwind uwtable readnone {
+  %1 = icmp slt <2 x i32*> %x, zeroinitializer
+  ret <2 x i1> %1
+}
+
+; CHECK: @ICmpSLT_vector
+; CHECK: icmp slt <2 x i64>
+; CHECK-NOT: call void @__msan_warning
+; CHECK: icmp slt <2 x i32*>
+; CHECK-NOT: call void @__msan_warning
+; CHECK: ret <2 x i1>
+
+
+; Check that we propagate shadow for x == y comparison.
+; This is a bit complex. See the comment in handleEqualityComparison.
+
+define i1 @ICmpEQ(i32 %x, i32 %y) nounwind uwtable readnone {
+  %1 = icmp eq i32 %x, %y
+  ret i1 %1
+}
+
+; CHECK: @ICmpEQ
+; CHECK: xor i32 %x, %y
+; CHECK: or i32
+; CHECK: xor i32
+; CHECK: and i32
+; CHECK: icmp eq i32
+; CHECK: icmp ne i32
+; CHECK: and i1
+; CHECK: icmp eq i32 %x, %y
+; CHECK: ret i1
+
+define <2 x i1> @ICmpEQ_vector(<2 x i32> %x, <2 x i32> %y) nounwind uwtable readnone {
+  %1 = icmp eq <2 x i32> %x, %y
+  ret <2 x i1> %1
+}
+
+; CHECK: @ICmpEQ_vector
+; CHECK: xor <2 x i32> %x, %y
+; CHECK: or <2 x i32>
+; CHECK: xor <2 x i32>
+; CHECK: and <2 x i32>
+; CHECK: icmp eq <2 x i32>
+; CHECK: icmp ne <2 x i32>
+; CHECK: and <2 x i1>
+; CHECK: icmp eq <2 x i32> %x, %y
+; CHECK: ret <2 x i1>
+
+define <2 x i1> @ICmpEQ_pointer_vector(<2 x i32*> %x, <2 x i32*> %y) nounwind uwtable readnone {
+  %1 = icmp eq <2 x i32*> %x, %y
+  ret <2 x i1> %1
+}
+
+; CHECK: @ICmpEQ_pointer_vector
+; CHECK: ptrtoint <2 x i32*> %x to <2 x i64>
+; CHECK: ptrtoint <2 x i32*> %y to <2 x i64>
+; CHECK: xor <2 x i64>
+; CHECK: or <2 x i64>
+; CHECK: xor <2 x i64>
+; CHECK: and <2 x i64>
+; CHECK: icmp eq <2 x i64>
+; CHECK: icmp ne <2 x i64>
+; CHECK: and <2 x i1>
+; CHECK: icmp eq <2 x i32*> %x, %y
+; CHECK: ret <2 x i1>
+
+
 ; Check that loads of shadow have the same aligment as the original loads.
 ; Check that loads of origin have the aligment of max(4, original alignment).