From fe04757f5e06ab15208ac0a2ab8d7e83c62b9f0d Mon Sep 17 00:00:00 2001
From: Chad Rosier <mcrosier@apple.com>
Date: Tue, 18 Oct 2011 05:28:00 +0000
Subject: Add support for dynamic stack realignment when in thumb1 mode.
 rdar://10288916

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142337 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/CodeGen/ARM/thumb1-dynrealign.ll | 40 +++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 test/CodeGen/ARM/thumb1-dynrealign.ll

(limited to 'test')

diff --git a/test/CodeGen/ARM/thumb1-dynrealign.ll b/test/CodeGen/ARM/thumb1-dynrealign.ll
new file mode 100644
index 0000000000..fa14fb42a3
--- /dev/null
+++ b/test/CodeGen/ARM/thumb1-dynrealign.ll
@@ -0,0 +1,40 @@
+; RUN: llc < %s -mtriple=thumbv6-apple-darwin | FileCheck %s
+
+; Normal load from SP
+define void @SP(i32 %i) nounwind uwtable ssp {
+entry:
+; CHECK: @SP
+; CHECK: push	{r7, lr}
+; CHECK-NEXT: mov r7, sp
+; CHECK-NEXT: sub sp, #4
+; CHECK-NEXT: mov r1, sp 
+; CHECK-NEXT: str r0, [r1]
+; CHECK-NEXT: mov r0, sp
+; CHECK-NEXT: blx _SP_
+; CHECK-NEXT: add sp, #4
+; CHECK-NEXT: pop {r7, pc}
+  %i.addr = alloca i32, align 4
+  store i32 %i, i32* %i.addr, align 4
+  call void @SP_(i32* %i.addr)
+  ret void
+}
+
+declare void @SP_(i32*)
+
+; Dynamic stack realignment
+define void @FP(double %a) nounwind uwtable ssp {
+entry:
+; CHECK: mov r4, sp
+; CHECK-NEXT: lsrs r4, r4, #3
+; CHECK-NEXT: lsls r4, r4, #3
+; CHECK-NEXT: mov sp, r4
+; Restore from FP
+; CHECK: subs r4, r7, #4
+; CHECK: mov sp, r4
+  %a.addr = alloca double, align 8
+  store double %a, double* %a.addr, align 8
+  call void @FP_(double* %a.addr)
+  ret void
+}
+
+declare void @FP_(double*)
-- 
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