From dd7a300c10bb0aaaf9e044c2180ca1b4c84e40c7 Mon Sep 17 00:00:00 2001
From: Nadav Rotem <nrotem@apple.com>
Date: Thu, 14 Mar 2013 23:49:44 +0000
Subject: [PATCH] Unaligned loads should use the VMOVUPS opcode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177130 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/X86/X86InstrSSE.td      |  2 +-
 test/CodeGen/X86/avx-load-store.ll |  2 +-
 test/CodeGen/X86/vec_align_i256.ll | 11 +++++++++++
 3 files changed, 13 insertions(+), 2 deletions(-)
 create mode 100644 test/CodeGen/X86/vec_align_i256.ll

diff --git a/lib/Target/X86/X86InstrSSE.td b/lib/Target/X86/X86InstrSSE.td
index 09797527573..f22a6b29cd2 100644
--- a/lib/Target/X86/X86InstrSSE.td
+++ b/lib/Target/X86/X86InstrSSE.td
@@ -1009,7 +1009,7 @@ let Predicates = [HasAVX] in {
             (VMOVUPSmr addr:$dst, (v4i32 (EXTRACT_SUBREG VR256:$src,sub_xmm)))>;
   def : Pat<(store (v8i16 (extract_subvector
                            (v16i16 VR256:$src), (iPTR 0))), addr:$dst),
-            (VMOVAPSmr addr:$dst, (v8i16 (EXTRACT_SUBREG VR256:$src,sub_xmm)))>;
+            (VMOVUPSmr addr:$dst, (v8i16 (EXTRACT_SUBREG VR256:$src,sub_xmm)))>;
   def : Pat<(store (v16i8 (extract_subvector
                            (v32i8 VR256:$src), (iPTR 0))), addr:$dst),
             (VMOVUPSmr addr:$dst, (v16i8 (EXTRACT_SUBREG VR256:$src,sub_xmm)))>;
diff --git a/test/CodeGen/X86/avx-load-store.ll b/test/CodeGen/X86/avx-load-store.ll
index 77a7c4f945f..432852d47d3 100644
--- a/test/CodeGen/X86/avx-load-store.ll
+++ b/test/CodeGen/X86/avx-load-store.ll
@@ -55,7 +55,7 @@ define void @storev16i16(<16 x i16> %a) nounwind {
 
 ; CHECK: storev16i16_01
 ; CHECK: vextractf128
-; CHECK: vmovaps  %xmm
+; CHECK: vmovups  %xmm
 define void @storev16i16_01(<16 x i16> %a) nounwind {
   store <16 x i16> %a, <16 x i16>* undef, align 4
   unreachable
diff --git a/test/CodeGen/X86/vec_align_i256.ll b/test/CodeGen/X86/vec_align_i256.ll
new file mode 100644
index 00000000000..44ca5c5c8e3
--- /dev/null
+++ b/test/CodeGen/X86/vec_align_i256.ll
@@ -0,0 +1,11 @@
+; RUN: llc < %s -mcpu=corei7-avx | FileCheck %s 
+
+; Make sure that we are not generating a movaps because the vector is aligned to 1.
+;CHECK: @foo
+;CHECK: xor
+;CHECK-NEXT: vmovups
+;CHECK-NEXT: ret
+define void @foo() {
+  store <16 x i16> zeroinitializer, <16 x i16>* undef, align 1
+  ret void
+}