Followup on Proposal to move MIR physical register namespace to '$' sigil.

Discussed here:

http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html

In preparation for adding support for named vregs we are changing the sigil for
physical registers in MIR to '$' from '%'. This will prevent name clashes of
named physical register with named vregs.

llvm-svn: 323922
diff --git a/llvm/test/CodeGen/X86/add-i64.ll b/llvm/test/CodeGen/X86/add-i64.ll
index 4edc6aa..9b8bbfd 100644
--- a/llvm/test/CodeGen/X86/add-i64.ll
+++ b/llvm/test/CodeGen/X86/add-i64.ll
@@ -17,7 +17,7 @@
 ; X64-NEXT:    movl %edi, %eax
 ; X64-NEXT:    addq $63, %rax
 ; X64-NEXT:    shrq $6, %rax
-; X64-NEXT:    # kill: def %eax killed %eax killed %rax
+; X64-NEXT:    # kill: def $eax killed $eax killed $rax
 ; X64-NEXT:    retq
   %2 = zext i32 %0 to i64
   %3 = add nuw nsw i64 %2, 63