Revert r146997, "Heed spill slot alignment on ARM."

This patch caused a miscompilation of oggenc because a frame pointer was
suddenly needed halfway through register allocation.

<rdar://problem/10625436>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147487 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/ARM/fast-isel-deadcode.ll b/test/CodeGen/ARM/fast-isel-deadcode.ll
index 7e147c7..1d77975 100644
--- a/test/CodeGen/ARM/fast-isel-deadcode.ll
+++ b/test/CodeGen/ARM/fast-isel-deadcode.ll
@@ -15,7 +15,8 @@
 ; THUMB-NOT: sxtb
 ; THUMB: movs r0, #0
 ; THUMB: movt r0, #0
-; THUMB: pop
+; THUMB: add sp, #32
+; THUMb: pop {r7, pc}
   ret i32 0
 }