Make PrologEpilogInserter save/restore all callee saved registers

[oota-llvm.git] / test / CodeGen / ARM / unwind-init.ll

diff --git a/test/CodeGen/ARM/unwind-init.ll b/test/CodeGen/ARM/unwind-init.ll
new file mode 100644 (file)
index 0000000..11683d5
--- /dev/null
+++ b/test/CodeGen/ARM/unwind-init.ll
@@ -0,0 +1,18 @@
+; RUN: llc -mtriple=armv7-unknown-linux-gnueabi < %s | FileCheck %s
+; Check that all callee-saved registers are saved and restored in functions
+; that call __builtin_unwind_init(). This is its undocumented behavior in gcc,
+; and it is used in compiling libgcc_eh.
+; See also PR8541
+
+declare void @llvm.eh.unwind.init()
+
+define void @calls_unwind_init() {
+  call void @llvm.eh.unwind.init()
+  ret void
+}
+
+; CHECK: calls_unwind_init:
+; CHECK: push    {r4, r5, r6, r7, r8, r9, r10, r11, lr}
+; CHECK: vpush   {d8, d9, d10, d11, d12, d13, d14, d15}
+; CHECK: vpop    {d8, d9, d10, d11, d12, d13, d14, d15}
+; CHECK: pop     {r4, r5, r6, r7, r8, r9, r10, r11, pc}