Change tests from "opt %s" to "opt < %s" so that opt doesn't see the
input filename so that opt doesn't print the input filename in the
output so that grep lines in the tests don't unintentionally match
strings in the input filename.

llvm-svn: 81537
diff --git a/llvm/test/Transforms/GlobalOpt/constantexpr-dangle.ll b/llvm/test/Transforms/GlobalOpt/constantexpr-dangle.ll
index 8588757..099c607 100644
--- a/llvm/test/Transforms/GlobalOpt/constantexpr-dangle.ll
+++ b/llvm/test/Transforms/GlobalOpt/constantexpr-dangle.ll
@@ -1,4 +1,4 @@
-; RUN: opt %s -instcombine -globalopt -S | \
+; RUN: opt < %s -instcombine -globalopt -S | \
 ; RUN:   grep {internal fastcc float @foo}
 
 define internal float @foo() {