Disable the PPC CTR-Loops pass by default.

The pass itself works well, but the something in the Machine* infrastructure
does not understand terminators which define registers. Without the ability
to use the block-placement pass, etc. this causes performance regressions (and
so is turned off by default). Turning off the analysis turns off the problems
with the Machine* infrastructure.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158206 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/PowerPC/ctrloop-reg.ll b/test/CodeGen/PowerPC/ctrloop-reg.ll
index 874e571..0746f66 100644
--- a/test/CodeGen/PowerPC/ctrloop-reg.ll
+++ b/test/CodeGen/PowerPC/ctrloop-reg.ll
@@ -1,7 +1,7 @@
 ; ModuleID = 'bugpoint-reduced-simplified.bc'
 target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v128:128:128-n32:64"
 target triple = "powerpc64-unknown-linux-gnu"
-; RUN: llc < %s -march=ppc64 | FileCheck %s
+; RUN: llc -enable-ppc-ctrloops < %s -march=ppc64 | FileCheck %s
 
 %struct.ref_s.1.49.91.115.121.139.145.151.157.163.169.175.181.211 = type { %union.v.0.48.90.114.120.138.144.150.156.162.168.174.180.210, i16, i16 }
 %union.v.0.48.90.114.120.138.144.150.156.162.168.174.180.210 = type { i64 }