[NFC] Added a negative test for new fold

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@370890 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstCombine/sub-and-or-not-xor.ll b/test/Transforms/InstCombine/sub-and-or-not-xor.ll
index e9bdcb11727069cedc15e56e59146314b8b028a4..dc56ba7bf6497263545eb76724429e9327498047 100644 (file)
--- a/test/Transforms/InstCombine/sub-and-or-not-xor.ll
+++ b/test/Transforms/InstCombine/sub-and-or-not-xor.ll
@@ -99,3 +99,22 @@ define <2 x i32> @sub_to_xor_vec(<2 x i32> %x, <2 x i32> %y) {
   %sub = sub <2 x i32> %and, %or
   ret <2 x i32> %sub
 }
+
+; Negative tests
+
+define i32 @sub_to_xor_extra_use_and_or(i32 %x, i32 %y) {
+; CHECK-LABEL: @sub_to_xor_extra_use_and_or(
+; CHECK-NEXT:    [[OR:%.*]] = or i32 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    call void @use(i32 [[OR]])
+; CHECK-NEXT:    [[AND:%.*]] = and i32 [[X]], [[Y]]
+; CHECK-NEXT:    call void @use(i32 [[AND]])
+; CHECK-NEXT:    [[SUB:%.*]] = sub i32 [[AND]], [[OR]]
+; CHECK-NEXT:    ret i32 [[SUB]]
+;
+  %or = or i32 %x, %y
+  call void @use(i32 %or)
+  %and = and i32 %x, %y
+  call void @use(i32 %and)
+  %sub = sub i32 %and, %or
+  ret i32 %sub
+}