Remove (somewhat confusing) Imp<> helper, use let Defs = [], Uses = [] instead.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41863 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86InstrMMX.td b/lib/Target/X86/X86InstrMMX.td
index 733dd37..b7024bc 100644
--- a/lib/Target/X86/X86InstrMMX.td
+++ b/lib/Target/X86/X86InstrMMX.td
@@ -476,10 +476,10 @@
                           [(set GR32:$dst, (int_x86_mmx_pmovmskb VR64:$src))]>;
 
 // Misc.
+let Uses = [EDI] in
 def MMX_MASKMOVQ : MMXI<0xF7, MRMDestMem, (outs), (ins VR64:$src, VR64:$mask),
                         "maskmovq\t{$mask, $src|$src, $mask}",
-                        [(int_x86_mmx_maskmovq VR64:$src, VR64:$mask, EDI)]>,
-                        Imp<[EDI],[]>;
+                        [(int_x86_mmx_maskmovq VR64:$src, VR64:$mask, EDI)]>;
 
 //===----------------------------------------------------------------------===//
 // Alias Instructions