new testcase, not implemented yet

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22703 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/LoopStrengthReduce/share_ivs.ll b/test/Transforms/LoopStrengthReduce/share_ivs.ll
new file mode 100644 (file)
index 0000000..1e4c844
--- /dev/null
+++ b/test/Transforms/LoopStrengthReduce/share_ivs.ll
@@ -0,0 +1,26 @@
+; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | grep phi | wc -l | grep 1
+
+; This testcase should have ONE stride 18 indvar, the other use should have a
+; loop invariant value (B) added to it inside of the loop, instead of having
+; a whole indvar based on B for it.
+
+; XFAIL: *
+
+declare bool %cond(uint)
+
+void %test(uint %B) {
+       br label %Loop
+Loop:
+       %IV = phi uint [0, %0], [%IVn, %Loop]
+
+       %C = mul uint %IV, 18
+       %D = mul uint %IV, 18
+       %E = add uint %D, %B
+
+       %cnd = call bool %cond(uint %E)
+       call bool %cond(uint %C)
+       %IVn = add uint %IV, 1
+       br bool %cnd, label %Loop, label %Out
+Out:
+       ret void
+}