From 36795239f57337f56b840a254d6b69cdcf918101 Mon Sep 17 00:00:00 2001
From: Eli Friedman <efriedma@codeaurora.org>
Date: Tue, 28 Feb 2017 23:32:55 +0000
Subject: [ARM] Don't generate deprecated T1 STM.

This prevents generating stm r1!, {r0, r1} on Thumb1, where value
stored for r1 is UNKONWN.

Patch by Zhaoshi Zheng.

Differential Revision: https://reviews.llvm.org/D27910

llvm-svn: 296538
---
 llvm/test/CodeGen/Thumb/stm-deprecated.ll | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 llvm/test/CodeGen/Thumb/stm-deprecated.ll

(limited to 'llvm/test')

diff --git a/llvm/test/CodeGen/Thumb/stm-deprecated.ll b/llvm/test/CodeGen/Thumb/stm-deprecated.ll
new file mode 100644
index 00000000000..ffe2c0afd92
--- /dev/null
+++ b/llvm/test/CodeGen/Thumb/stm-deprecated.ll
@@ -0,0 +1,19 @@
+; RUN: llc -mtriple=thumbv6m-eabi -verify-machineinstrs %s -o - | FileCheck %s
+; RUN: llc -mtriple=thumbv5e-linux-gnueabi -verify-machineinstrs %s -o - | FileCheck %s
+
+%0 = type { %0*, %0*, i32 }
+
+@x1 = external global %0, align 4
+@x2 = external global %0, align 4
+
+; CHECK: str r0, [r1]
+; CHECK-NEXT: str r1, [r1, #4]
+; CHECK-NOT: stm
+
+define void @foo(i32 %unused, %0* %x) {
+  %first = getelementptr inbounds %0, %0* %x, i32 0, i32 0
+  %second = getelementptr inbounds %0, %0* %x, i32 0, i32 1
+  store %0* @x1, %0** %first
+  store %0* %x, %0** %second
+  unreachable
+}
-- 
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