temporarily fail these two tests until LSR evolves to support them

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22567 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/LoopStrengthReduce/dont_insert_redundant_ops.ll

@@ -1,6 +1,8 @@
 ; Check that this test makes INDVAR and related stuff dead.
 ; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | grep phi | wc -l | grep 2
 
+; XFAIL: *
+
 declare bool %pred()
 
 void %test1({ int, int }* %P) {

test/Transforms/LoopStrengthReduce/dont_reduce_bytes.ll

@@ -3,6 +3,8 @@
 
 ; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | grep 'getelementptr.*PTR.*INDVAR'
 
+; XFAIL: *
+
 declare bool %pred(int)
 
 void %test(sbyte* %PTR) {