New testcase that functions with dynamic allocas can be inlined, and are

inlined correctly.

llvm-svn: 25287

1 files changed, 28 insertions, 0 deletions

diff --git a/llvm/test/Regression/Transforms/Inline/dynamic_alloca_test.ll b/llvm/test/Regression/Transforms/Inline/dynamic_alloca_test.ll
new file mode 100644
index 00000000000..27c7d717a11
--- /dev/null
+++ b/llvm/test/Regression/Transforms/Inline/dynamic_alloca_test.ll
@@ -0,0 +1,28 @@
+; Test that functions with dynamic allocas get inlined in a case where
+; naively inlining it would result in a miscompilation.
+
+; RUN: llvm-as < %s | opt -inline &&
+; RUN: llvm-as < %s | opt -inline | llvm-dis | grep llvm.stacksave &&
+; RUN: llvm-as < %s | opt -inline | llvm-dis | not grep callee
+
+declare void %ext(int*)
+implementation
+
+internal void %callee(uint %N) {
+	%P = alloca int, uint %N     ;; dynamic alloca
+	call void %ext(int* %P)
+	ret void
+}
+
+void %foo(uint %N) {
+	br label %Loop
+Loop:
+	%count = phi uint [0, %0], [%next, %Loop]
+	%next = add uint %count, 1
+	call void %callee(uint %N)
+	%cond = seteq uint %count, 100000
+	br bool %cond, label %out, label %Loop
+out:
+	ret void
+}
+