Revert "Change memcpy/memset/memmove to have dest and source alignments."

This reverts commit r253511.

This likely broke the bots in
http://lab.llvm.org:8011/builders/clang-ppc64-elf-linux2/builds/20202
http://bb.pgr.jp/builders/clang-3stage-i686-linux/builds/3787

llvm-svn: 253543
diff --git a/llvm/test/CodeGen/ARM/Windows/memset.ll b/llvm/test/CodeGen/ARM/Windows/memset.ll
index c9b22f4..500e25e 100644
--- a/llvm/test/CodeGen/ARM/Windows/memset.ll
+++ b/llvm/test/CodeGen/ARM/Windows/memset.ll
@@ -2,11 +2,11 @@
 
 @source = common global [512 x i8] zeroinitializer, align 4
 
-declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i1) nounwind
+declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) nounwind
 
 define void @function() {
 entry:
-  call void @llvm.memset.p0i8.i32(i8* bitcast ([512 x i8]* @source to i8*), i8 0, i32 512, i1 false)
+  call void @llvm.memset.p0i8.i32(i8* bitcast ([512 x i8]* @source to i8*), i8 0, i32 512, i32 0, i1 false)
   unreachable
 }