From f8ff637b8dead5e25d4d6e2a02161946f21503d1 Mon Sep 17 00:00:00 2001
From: Manman Ren <mren@apple.com>
Date: Sat, 2 Jun 2012 05:37:44 +0000
Subject: [PATCH] ARM: add testing case for struct byval

rdar://9877866

llvm-svn: 157876
---
 test/CodeGen/ARM/struct_byval.ll | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 test/CodeGen/ARM/struct_byval.ll

diff --git a/test/CodeGen/ARM/struct_byval.ll b/test/CodeGen/ARM/struct_byval.ll
new file mode 100644
index 00000000000..0c2f7398cb7
--- /dev/null
+++ b/test/CodeGen/ARM/struct_byval.ll
@@ -0,0 +1,32 @@
+; RUN: llc < %s -mtriple=armv7-apple-ios6.0 | FileCheck %s
+
+; rdar://9877866
+%struct.SmallStruct = type { i32, [8 x i32], [37 x i8] }
+%struct.LargeStruct = type { i32, [1001 x i8], [300 x i32] }
+
+define i32 @f() nounwind ssp {
+entry:
+; CHECK: f:
+; CHECK: ldr
+; CHECK: str
+; CHECK-NOT:bne
+  %st = alloca %struct.SmallStruct, align 4
+  %call = call i32 @e1(%struct.SmallStruct* byval %st)
+  ret i32 0
+}
+
+; Generate a loop for large struct byval
+define i32 @g() nounwind ssp {
+entry:
+; CHECK: g:
+; CHECK: ldr
+; CHECK: sub
+; CHECK: str
+; CHECK: bne
+  %st = alloca %struct.LargeStruct, align 4
+  %call = call i32 @e2(%struct.LargeStruct* byval %st)
+  ret i32 0
+}
+
+declare i32 @e1(%struct.SmallStruct* nocapture byval %in) nounwind
+declare i32 @e2(%struct.LargeStruct* nocapture byval %in) nounwind