Oh right, casts can interfere. Test this too

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12354 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstCombine/sub.ll b/test/Transforms/InstCombine/sub.ll
index 59dc5bd06eab1d767528e397036f0aba5c544483..801991212ae3337533d1976b2c8e127e02176ae4 100644 (file)
--- a/test/Transforms/InstCombine/sub.ll
+++ b/test/Transforms/InstCombine/sub.ll
@@ -86,3 +86,11 @@ uint %test13(uint %A) {
        %C = sub uint 0, %B        ; == sar A, 31
        ret uint %C
 }
+
+int %test14(uint %A) {
+        %B = shr uint %A, ubyte 31
+        %C = cast uint %B to int
+        %D = sub int 0, %C
+        ret int %D
+}
+