New testcase for sinking operations from loops with multiple exits

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10344 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/LICM/sink_multiple_exits.ll

@@ -0,0 +1,22 @@
+; This testcase ensures that we can sink instructions from loops with
+; multiple exits.
+;
+; RUN: llvm-as < %s | opt -licm | llvm-dis | grep -C1 mul | grep Out: 
+
+int %test(int %N, bool %C) {
+Entry:
+	br label %Loop
+Loop:
+        %N_addr.0.pn = phi int [ %dec, %ContLoop ], [ %N, %Entry ]
+        %tmp.6 = mul int %N, %N_addr.0.pn
+        %tmp.7 = sub int %tmp.6, %N
+        %dec = add int %N_addr.0.pn, -1
+        br bool %C, label %ContLoop, label %Out1
+ContLoop:
+        %tmp.1 = setne int %N_addr.0.pn, 1
+        br bool %tmp.1, label %Loop, label %Out2
+Out1:
+	ret int %tmp.7
+Out2:
+        ret int %tmp.7
+}