[CodeGen] Don't print "pred:" and "opt:" in -debug output

In -debug output we print "pred:" whenever a MachineOperand is a
predicate operand in the instruction descriptor, and "opt:" whenever a
MachineOperand is an optional def in the instruction descriptor.

Differential Revision: https://reviews.llvm.org/D41870

llvm-svn: 322096
diff --git a/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp b/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp
index ffcb9a0..9ed7450 100644
--- a/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp
+++ b/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp
@@ -448,11 +448,11 @@
   // FIXME: The issue with predicated instruction is more complex. We are being
   // conservatively here because the kill markers cannot be trusted after
   // if-conversion:
-  // %r6 = LDR %sp, %reg0, 92, pred:14, pred:%reg0; mem:LD4[FixedStack14]
+  // %r6 = LDR %sp, %reg0, 92, 14, %reg0; mem:LD4[FixedStack14]
   // ...
-  // STR %r0, killed %r6, %reg0, 0, pred:0, pred:%cpsr; mem:ST4[%395]
-  // %r6 = LDR %sp, %reg0, 100, pred:0, pred:%cpsr; mem:LD4[FixedStack12]
-  // STR %r0, killed %r6, %reg0, 0, pred:14, pred:%reg0; mem:ST4[%396](align=8)
+  // STR %r0, killed %r6, %reg0, 0, 0, %cpsr; mem:ST4[%395]
+  // %r6 = LDR %sp, %reg0, 100, 0, %cpsr; mem:LD4[FixedStack12]
+  // STR %r0, killed %r6, %reg0, 0, 14, %reg0; mem:ST4[%396](align=8)
   //
   // The first R6 kill is not really a kill since it's killed by a predicated
   // instruction which may not be executed. The second R6 def may or may not