Add test for instcombine -1*X -> -X

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6905 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstCombine/mul.ll b/test/Transforms/InstCombine/mul.ll
index 962f599892fc7703936c5e1d4a40ee5334d45634..5144cc28d1c36ca130d069fd7ac9c9a67137303c 100644 (file)
--- a/test/Transforms/InstCombine/mul.ll
+++ b/test/Transforms/InstCombine/mul.ll
@@ -33,8 +33,18 @@ int %test5(int %A) {
        ret int %B
 }
 
-int %test6(ubyte %A) {
+ubyte %test6(ubyte %A) {
        %B = mul ubyte %A, 8
        %C = mul ubyte %B, 13
        ret ubyte %C
 }
+
+int %test7(int %i) {
+        %tmp = mul int %i, -1   ; %tmp = sub 0, %i
+        ret int %tmp
+}
+
+ulong %test8(ulong %i) {
+       %j = mul ulong %i, 18446744073709551615 ; tmp = sub 0, %i
+       ret ulong %j
+}