--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/CodeGen/X86/memcpy.ll	Thu Dec 12 13:56:28 2013 +0900
@@ -0,0 +1,120 @@
+; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=core2 | FileCheck %s -check-prefix=LINUX
+; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=core2 | FileCheck %s -check-prefix=DARWIN
+
+declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
+
+
+; Variable memcpy's should lower to calls.
+define i8* @test1(i8* %a, i8* %b, i64 %n) nounwind {
+entry:
+	tail call void @llvm.memcpy.p0i8.p0i8.i64( i8* %a, i8* %b, i64 %n, i32 1, i1 0 )
+	ret i8* %a
+        
+; LINUX-LABEL: test1:
+; LINUX: memcpy
+}
+
+; Variable memcpy's should lower to calls.
+define i8* @test2(i64* %a, i64* %b, i64 %n) nounwind {
+entry:
+	%tmp14 = bitcast i64* %a to i8*
+	%tmp25 = bitcast i64* %b to i8*
+	tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %tmp14, i8* %tmp25, i64 %n, i32 8, i1 0 )
+	ret i8* %tmp14
+        
+; LINUX-LABEL: test2:
+; LINUX: memcpy
+}
+
+; Large constant memcpy's should lower to a call when optimizing for size.
+; PR6623
+
+; On the other hand, Darwin's definition of -Os is optimizing for size without
+; hurting performance so it should just ignore optsize when expanding memcpy.
+; rdar://8821501
+define void @test3(i8* nocapture %A, i8* nocapture %B) nounwind optsize noredzone {
+entry:
+  tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %A, i8* %B, i64 64, i32 1, i1 false)
+  ret void
+; LINUX-LABEL: test3:
+; LINUX: memcpy
+
+; DARWIN-LABEL: test3:
+; DARWIN-NOT: memcpy
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+}
+
+; Large constant memcpy's should be inlined when not optimizing for size.
+define void @test4(i8* nocapture %A, i8* nocapture %B) nounwind noredzone {
+entry:
+  tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %A, i8* %B, i64 64, i32 1, i1 false)
+  ret void
+; LINUX-LABEL: test4:
+; LINUX: movq
+; LINUX: movq
+; LINUX: movq
+; LINUX: movq
+; LINUX: movq
+; LINUX: movq
+; LINUX: movq
+; LINUX: movq
+; LINUX: movq
+; LINUX: movq
+; LINUX: movq
+; LINUX: movq
+}
+
+
+@.str = private unnamed_addr constant [30 x i8] c"\00aaaaaaaaaaaaaaaaaaaaaaaaaaaa\00", align 1
+
+define void @test5(i8* nocapture %C) nounwind uwtable ssp {
+entry:
+  tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %C, i8* getelementptr inbounds ([30 x i8]* @.str, i64 0, i64 0), i64 16, i32 1, i1 false)
+  ret void
+
+; DARWIN-LABEL: test5:
+; DARWIN: movabsq	$7016996765293437281
+; DARWIN: movabsq	$7016996765293437184
+}
+
+
+; PR14896
+@.str2 = private unnamed_addr constant [2 x i8] c"x\00", align 1
+
+define void @test6() nounwind uwtable {
+entry:
+; DARWIN: test6
+; DARWIN: movw $0, 8
+; DARWIN: movq $120, 0
+  tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* null, i8* getelementptr inbounds ([2 x i8]* @.str2, i64 0, i64 0), i64 10, i32 1, i1 false)
+  ret void
+}
+
+define void @PR15348(i8* %a, i8* %b) {
+; Ensure that alignment of '0' in an @llvm.memcpy intrinsic results in
+; unaligned loads and stores.
+; LINUX: PR15348
+; LINUX: movb
+; LINUX: movb
+; LINUX: movq
+; LINUX: movq
+; LINUX: movq
+; LINUX: movq
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %a, i8* %b, i64 17, i32 0, i1 false)
+  ret void
+}