Use -disable-output and to suppress output and don't use a temporary file unless we need one.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188843 91177308-0d34-0410-b5e6-96231b3b80d8

test/Bitcode/extractelement.ll

@@ -1,4 +1,4 @@
-; RUN: opt < %s -constprop | llvm-dis
+; RUN: opt < %s -constprop | llvm-dis -disable-output
 ; PR3465
 
 define double @test() {

test/Bitcode/metadata-2.ll

@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | llvm-dis -o /dev/null
+; RUN: llvm-as < %s | llvm-dis -disable-output
 	%0 = type { %object.ModuleInfo.__vtbl*, i8*, %"byte[]", %1, %"ClassInfo[]", i32, void ()*, void ()*, void ()*, i8*, void ()* }		; type %0
 	%1 = type { i64, %object.ModuleInfo* }		; type %1
 	%2 = type { i32, void ()* }		; type %2

test/Bitcode/metadata.ll

@@ -1,6 +1,5 @@
-; RUN: llvm-as < %s | llvm-dis -o /dev/null
+; RUN: llvm-as < %s | llvm-dis -disable-output
 
 !llvm.foo = !{!0}
 !0 = metadata !{i32 42}
 @my.str = internal constant [4 x i8] c"foo\00"
-

test/Bitcode/null-type.ll

@@ -1,5 +1,4 @@
-; RUN: not llvm-dis < %s.bc > /dev/null 2> %t
-; RUN: FileCheck %s < %t
+; RUN: not llvm-dis < %s.bc 2>&1 | FileCheck %s
 ; PR8494
 
 ; CHECK: Invalid MODULE_CODE_FUNCTION record

test/Bitcode/shuffle.ll

@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | llvm-dis
+; RUN: llvm-as < %s | llvm-dis -disable-output
 
 ; <rdar://problem/8622574>
 ; tests the bitcodereader can handle the case where the reader will initially