Remove explicit control flow through the use of the 'not' script

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6965 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/GlobalDCE/2002-08-17-FunctionDGE.ll

@@ -1,10 +1,7 @@
 ; Make sure that functions are removed successfully if they are referred to by
 ; a global that is dead.  Make sure any globals they refer to die as well.
 
-; RUN: if as < %s | opt -globaldce | dis | grep foo
-; RUN: then exit 1
-; RUN: else exit 0
-; RUN: fi
+; RUN: as < %s | opt -globaldce | dis | not grep foo
 
 %b = internal global int ()* %foo   ;; Unused, kills %foo
 

test/Transforms/GlobalDCE/2002-08-17-WorkListTest.ll

@@ -1,10 +1,7 @@
 ; This testcase tests that a worklist is being used, and that globals can be 
 ; removed if they are the subject of a constexpr and ConstantPointerRef
 
-; RUN: if as < %s | opt -globaldce | dis | grep global
-; RUN: then exit 1
-; RUN: else exit 0
-; RUN: fi
+; RUN: as < %s | opt -globaldce | dis | not grep global
 
 %t0 = internal global [4 x sbyte] c"foo\00"
 %t1 = internal global [4 x sbyte] c"bar\00"

test/Transforms/GlobalDCE/basicvariabletest.ll

@@ -1,8 +1,4 @@
-; RUN: if as < %s | opt -globaldce | dis | grep global
-; RUN: then exit 1
-; RUN: else exit 0
-; RUN: fi
-
+; RUN: as < %s | opt -globaldce | dis | not grep global
 
 %X = uninitialized global int
 %Y = internal global int 7