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/Transforms/MergeFunc/vector.ll b/llvm/test/Transforms/MergeFunc/vector.ll
index db95ec7..ef13753 100644
--- a/llvm/test/Transforms/MergeFunc/vector.ll
+++ b/llvm/test/Transforms/MergeFunc/vector.ll
@@ -59,7 +59,7 @@
 
 declare void @_ZdlPv(i8*) nounwind
 
-declare void @llvm.memmove.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1) nounwind
+declare void @llvm.memmove.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
 
 declare void @_ZSt17__throw_bad_allocv() noreturn