Make opt default to not adding a target data string and update tests that depend on target data to supply it within the test

llvm-svn: 85900
diff --git a/llvm/test/Transforms/InstCombine/fp-ret-bitcast.ll b/llvm/test/Transforms/InstCombine/fp-ret-bitcast.ll
index 169340a..35ece42 100644
--- a/llvm/test/Transforms/InstCombine/fp-ret-bitcast.ll
+++ b/llvm/test/Transforms/InstCombine/fp-ret-bitcast.ll
@@ -1,5 +1,6 @@
 ; RUN: opt < %s -instcombine -S | \
 ; RUN:    grep {call float bitcast} | count 1
+target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
 	%struct.NSObject = type { %struct.objc_class* }
  	%struct.NSArray = type { %struct.NSObject }
 	%struct.objc_class = type opaque