Disable statistics on Release builds and move tests that depend on -stats.

Summary:
Statistics are still available in Release+Asserts (any +Asserts builds),
and stats can also be turned on with LLVM_ENABLE_STATS.

Move some of the FastISel stats that were moved under DEBUG()
back out of DEBUG(), since stats are disabled across the board now.

Many tests depend on grepping "-stats" output.  Move those into
a orig_dir/Stats/. so that they can be marked as unsupported
when building without statistics.

Differential Revision: http://llvm-reviews.chandlerc.com/D486

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176733 91177308-0d34-0410-b5e6-96231b3b80d8

test/Analysis/RegionInfo/infinite_loop_2.ll

@@ -1,36 +0,0 @@
-; RUN: opt -regions -analyze < %s 
-; RUN: opt -regions -stats < %s 2>&1 | FileCheck -check-prefix=STAT %s
-; RUN: opt -regions -print-region-style=bb  -analyze < %s 2>&1 | FileCheck -check-prefix=BBIT %s
-; RUN: opt -regions -print-region-style=rn  -analyze < %s 2>&1 | FileCheck -check-prefix=RNIT %s
-
-define void @normal_condition() nounwind {
-0:
-	br label %"1"
-1:
-	br i1 1, label %"2", label %"3"
-2:
-	br label %"5"
-5:
-	br i1 1, label %"11", label %"12"
-11:
-        br label %"6"
-12:
-        br label %"6"
-6:
-        br label %"2"
-3:
-	br label %"4"
-4:
-	ret void
-}
-; CHECK-NOT: =>
-; CHECK: [0] 0 => <Function Return>
-; CHECK: [1] 1 => 3
-; STAT: 2 region - The # of regions
-; STAT: 1 region - The # of simple regions
-
-; BBIT: 0, 1, 2, 5, 11, 6, 12, 3, 4,
-; BBIT: 1, 2, 5, 11, 6, 12,
-
-; RNIT: 0, 1 => 3, 3, 4,
-; RNIT: 1, 2, 5, 11, 6, 12,