Fix ARM FastISel tests, as a first step to enabling ARM FastISel

ARM FastISel is currently only enabled for iOS non-Thumb1, and I'm working on
enabling it for other targets. As a first step I've fixed some of the tests.
Changes to ARM FastISel tests:
- Different triples don't generate the same relocations (especially
  movw/movt versus constant pool loads). Use a regex to allow either.
- Mangling is different. Use a regex to allow either.
- The reserved registers are sometimes different, so registers get
  allocated in a different order. Capture the names only where this
  occurs.
- Add -verify-machineinstrs to some tests where it works. It doesn't
  work everywhere it should yet.
- Add -fast-isel-abort to many tests that didn't have it before.
- Split out the VarArg test from fast-isel-call.ll into its own
  test. This simplifies test setup because of --check-prefix.

Patch by JF Bastien

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181801 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGen/ARM/fast-isel-br-const.ll

@@ -7,8 +7,8 @@ entry:
 ; ARM: t1:
   %x = add i32 %a, %b  
   br i1 1, label %if.then, label %if.else
-; THUMB-NOT: b LBB0_1
-; ARM-NOT:  b LBB0_1
+; THUMB-NOT: b {{\.?}}LBB0_1
+; ARM-NOT:  b {{\.?}}LBB0_1
 
 if.then:                                          ; preds = %entry
   call void @foo1()
@@ -16,8 +16,8 @@ if.then:                                          ; preds = %entry
 
 if.else:                                          ; preds = %entry
   br i1 0, label %if.then2, label %if.else3
-; THUMB: b LBB0_4
-; ARM:  b LBB0_4
+; THUMB: b {{\.?}}LBB0_4
+; ARM:  b {{\.?}}LBB0_4
 
 if.then2:                                         ; preds = %if.else
   call void @foo2()
@@ -26,8 +26,8 @@ if.then2:                                         ; preds = %if.else
 if.else3:                                         ; preds = %if.else
   %y = sub i32 %a, %b
   br i1 1, label %if.then5, label %if.end
-; THUMB-NOT: b LBB0_5
-; ARM-NOT:  b LBB0_5
+; THUMB-NOT: b {{\.?}}LBB0_5
+; ARM-NOT:  b {{\.?}}LBB0_5
 
 if.then5:                                         ; preds = %if.else3
   call void @foo1()