Revert "[SCEV] Enable SCEV verification by default in EXPENSIVE_CHECKS builds"

This reverts commit r301150.  It breaks CodeGen/Hexagon/hwloop-wrap2.ll, reverting
while I investigate.

llvm-svn: 301154

llvm/lib/Analysis/ScalarEvolution.cpp

@@ -114,16 +114,9 @@ MaxBruteForceIterations("scalar-evolution-max-iterations", cl::ReallyHidden,
                         cl::init(100));
 
 // FIXME: Enable this with EXPENSIVE_CHECKS when the test suite is clean.
-static cl::opt<bool> VerifySCEV(
-    "verify-scev",
-    cl::desc("Verify ScalarEvolution's backedge taken counts (slow)"),
-#ifdef EXPENSIVE_CHECKS
-    cl::init(true)
-#else
-    cl::init(false)
-#endif
-  );
-
+static cl::opt<bool>
+VerifySCEV("verify-scev",
+           cl::desc("Verify ScalarEvolution's backedge taken counts (slow)"));
 static cl::opt<bool>
     VerifySCEVMap("verify-scev-maps",
                   cl::desc("Verify no dangling value in ScalarEvolution's "

llvm/test/Transforms/LoopUnswitch/2008-11-03-Invariant.ll

@@ -1,5 +1,5 @@
 ; REQUIRES: asserts
-; RUN: opt < %s -loop-unswitch -stats -disable-output 2>&1 | grep "1 loop-unswitch[ ]*-[ ]*Number of branches unswitched" | count 1
+; RUN: opt < %s -loop-unswitch -stats -disable-output 2>&1 | grep "1 loop-unswitch - Number of branches unswitched" | count 1
 ; PR 3170
 define i32 @a(i32 %x, i32 %y) nounwind {
 entry: