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/GlobalOpt/memset-null.ll b/llvm/test/Transforms/GlobalOpt/memset-null.ll
index 1a1f550..838ac09 100644
--- a/llvm/test/Transforms/GlobalOpt/memset-null.ll
+++ b/llvm/test/Transforms/GlobalOpt/memset-null.ll
@@ -8,12 +8,12 @@
 @a = global %struct.A zeroinitializer, align 4
 @llvm.global_ctors = appending global [2 x %0] [%0 { i32 65535, void ()* @_GLOBAL__I_a }, %0 { i32 65535, void ()* @_GLOBAL__I_b }]
 
-declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1) nounwind
+declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind
 
 ; CHECK-NOT: GLOBAL__I_a
 define internal void @_GLOBAL__I_a() nounwind {
 entry:
-  tail call void @llvm.memset.p0i8.i64(i8* bitcast (%struct.A* @a to i8*), i8 0, i64 400, i1 false) nounwind
+  tail call void @llvm.memset.p0i8.i64(i8* bitcast (%struct.A* @a to i8*), i8 0, i64 400, i32 4, i1 false) nounwind
   ret void
 }
 
@@ -24,6 +24,6 @@
 define internal void @_GLOBAL__I_b() nounwind {
 entry:
   %tmp.i.i.i = load i8*, i8** @y, align 8
-  tail call void @llvm.memset.p0i8.i64(i8* %tmp.i.i.i, i8 0, i64 10, i1 false) nounwind
+  tail call void @llvm.memset.p0i8.i64(i8* %tmp.i.i.i, i8 0, i64 10, i32 1, i1 false) nounwind
   ret void
 }