Create local config file for subzero reader tests.

tests_lit/reader_tests/insertextract-err.ll

 ; Tests insertelement and extractelement vector instructions report
 ; errors when malformed. Note: We can only test literal indexing since
 ; llvm-as will not allow other bad forms of these instructions.
 
-; REQUIRES: allow_dump
 ; RUN: llvm-as < %s | pnacl-freeze \
 ; RUN:   | not %llvm2ice -notranslate -build-on-read \
 ; RUN:     -allow-pnacl-reader-error-recovery | FileCheck %s
 
 define void @ExtractV4xi1(<4 x i1> %v, i32 %i) {
   %e0 = extractelement <4 x i1> %v, i32 %i
 ; CHECK: Error: {{.*}} not {{.*}} constant

[jvoung (off chromium), 2014/11/17 22:16:10]

I didn't think about this when making the suggesting, but... we'll probably want
some lightweight error message even in the minimal builds, right?

That might mean moving the -err tests to a directory that does not require
allow_dump.

[Jim Stichnoth, 2014/11/18 16:04:58]

Good point.  What about retaining most or all of the error dump output even in
the minimal build, and not requiring allow_dump in the -err.ll tests?  And/or
put those tests in a separate directory for clarity as Jan suggests?

[Karl, 2014/11/19 18:34:09]

Built a test directory "parse-errs" for parsing errors. Tests what errors are
generated when "dump" is both allowed and disallowed. Modified errors when
"dump" is not allowed to generate a simplistic  parse error message based on the
bitcode record being parsed, since many of the parse error count on the
availability of dump routines.

   %e1 = extractelement <4 x i1> %v, i32 4
 ; CHECK: Error: {{.*}} not in range
   %e2 = extractelement <4 x i1> %v, i32 9
 ; CHECK: Error: {{.*}} not in range
   ret void
 }
 
 define void @ExtractV8xi1(<8 x i1> %v, i32 %i) {
   %e0 = extractelement <8 x i1> %v, i32 %i
 ; CHECK: Error: {{.*}} not {{.*}} constant
@@ skipping 117 matching lines @@
 
 define <4 x float> @InsertV4xfloat(<4 x float> %v, i32 %i) {
   %r0 = insertelement <4 x float> %v, float 3.0, i32 %i
 ; CHECK: Error: {{.*}} not {{.*}} constant
   %r1 = insertelement <4 x float> %v, float 3.0, i32 4
 ; CHECK: Error: {{.*}} not in range
   %r2 = insertelement <4 x float> %v, float 3.0, i32 44
 ; CHECK: Error: {{.*}} not in range
   ret <4 x float> %r2
 }