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-rw-r--r--test/Transforms/LoopSimplify/single-backedge.ll17
1 files changed, 17 insertions, 0 deletions
diff --git a/test/Transforms/LoopSimplify/single-backedge.ll b/test/Transforms/LoopSimplify/single-backedge.ll
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+++ b/test/Transforms/LoopSimplify/single-backedge.ll
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+; The loop canonicalization pass should guarantee that there is one backedge
+; for all loops. This allows the -indvars pass to recognize the %IV
+; induction variable in this testcase.
+
+; RUN: llvm-as < %s | opt -indvars | llvm-dis | grep indvar
+
+int %test(bool %C) {
+ br label %Loop
+Loop:
+ %IV = phi uint [0, %0], [%IV2, %BE1], [%IV2, %BE2]
+ %IV2 = add uint %IV, 2
+ br bool %C, label %BE1, label %BE2
+BE1:
+ br label %Loop
+BE2:
+ br label %Loop
+}