Fix rdtsc.ll test to match r8 on win64

llvm-svn: 207142
diff --git a/llvm/test/CodeGen/X86/rdtsc.ll b/llvm/test/CodeGen/X86/rdtsc.ll
index f169742..dba614a 100644
--- a/llvm/test/CodeGen/X86/rdtsc.ll
+++ b/llvm/test/CodeGen/X86/rdtsc.ll
@@ -38,7 +38,7 @@
 ; CHECK-LABEL: test_builtin_rdtscp
 ; CHECK: rdtscp
 ; X86-NOT: shlq
-; CHECK:   movl	%ecx, (%{{[a-z]+}})
+; CHECK:   movl	%ecx, (%{{[a-z0-9]+}})
 ; X86-NOT: shlq
 ; CHECK: ret