1 files changed, 24 insertions, 0 deletions
diff --git a/test/Transforms/LoopStrengthReduce/share_ivs.ll b/test/Transforms/LoopStrengthReduce/share_ivs.ll
new file mode 100644
index 0000000..76bfe1d
--- /dev/null
+++ b/test/Transforms/LoopStrengthReduce/share_ivs.ll
@@ -0,0 +1,24 @@
+; RUN: llvm-upgrade < %s | llvm-as | 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.
+
+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
+}