1 files changed, 38 insertions, 0 deletions
diff --git a/test/Transforms/Inline/byval-tail-call.ll b/test/Transforms/Inline/byval-tail-call.ll
new file mode 100644
index 000000000000..3a8906aa210f
--- /dev/null
+++ b/test/Transforms/Inline/byval-tail-call.ll
@@ -0,0 +1,38 @@
+; RUN: opt < %s -tailcallelim -inline -instcombine -dse -S | FileCheck %s
+; PR7272
+
+; Calls that capture byval parameters cannot be marked as tail calls. Other
+; tails that don't capture byval parameters can still be tail calls.
+
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32"
+target triple = "i386-pc-linux-gnu"
+
+declare void @ext(i32*)
+
+define void @bar(i32* byval %x) {
+  call void @ext(i32* %x)
+  ret void
+}
+
+define void @foo(i32* %x) {
+; CHECK-LABEL: define void @foo(
+; CHECK: llvm.lifetime.start
+; CHECK: store i32 %2, i32* %x
+  call void @bar(i32* byval %x)
+  ret void
+}
+
+define internal void @qux(i32* byval %x) {
+  call void @ext(i32* %x)
+  tail call void @ext(i32* null)
+  ret void
+}
+define void @frob(i32* %x) {
+; CHECK-LABEL: define void @frob(
+; CHECK: alloca i32
+; CHECK: {{^ *}}call void @ext(
+; CHECK: tail call void @ext(i32* null)
+; CHECK: ret void
+  tail call void @qux(i32* byval %x)
+  ret void
+}