1 files changed, 12 insertions, 0 deletions
diff --git a/test/Transforms/TailCallElim/dont-tce-tail-marked-call.ll b/test/Transforms/TailCallElim/dont-tce-tail-marked-call.ll
new file mode 100644
index 0000000..d3ba65e
--- /dev/null
+++ b/test/Transforms/TailCallElim/dont-tce-tail-marked-call.ll
@@ -0,0 +1,12 @@
+; RUN: llvm-upgrade < %s | llvm-as | opt -tailcallelim | llvm-dis | \
+; RUN:    grep {call i32 @foo}
+
+declare void %bar(int*)
+int %foo(uint %N) {
+  %A = alloca int, uint %N             ;; Should stay in entry block because of 'tail' marker
+  store int 17, int* %A
+  call void %bar(int* %A)
+
+  %X = tail call int %foo(uint %N)  ;; Cannot -tailcallelim this without increasing stack usage!
+  ret int %X
+}