Allow Subzero to parse function blocks in parallel.

tests_lit/parse_errs/insertextract-err.ll

 ; Tests malformed insertelement and extractelement vector instructions.
 
-; RUN: %if --need=allow_dump --command llvm-as < %s \
-; RUN:   | %if --need=allow_dump --command pnacl-freeze \
-; RUN:   | %if --need=allow_dump --command not %pnacl_sz -notranslate \
-; RUN:     -build-on-read -allow-pnacl-reader-error-recovery \
-; RUN:     -filetype=obj -o /dev/null \
+; RUN: %if --need=allow_dump --command \
+; RUN:   %p2i --expect-fail -i %s --allow-pnacl-reader-error-recovery \
+; RUN:   --filetype=obj -o /dev/null --args -notranslate \
 ; RUN:   | %if --need=allow_dump --command FileCheck %s
 
-; RUN: %if --need=no_dump --command llvm-as < %s \
-; RUN:   | %if --need=no_dump --command pnacl-freeze \
-; RUN:   | %if --need=no_dump --command not %pnacl_sz -notranslate \
-; RUN:     -build-on-read -allow-pnacl-reader-error-recovery \
-; RUN:     -filetype=obj -o /dev/null \
+; RUN: %if --need=no_dump --command \
+; RUN:   %p2i --expect-fail -i %s --allow-pnacl-reader-error-recovery \
+; RUN:   --filetype=obj -o /dev/null --args -notranslate \
 ; RUN:   | %if --need=no_dump --command FileCheck %s --check-prefix=MIN
 
 define void @ExtractV4xi1(<4 x i1> %v, i32 %i) {
   %e0 = extractelement <4 x i1> %v, i32 %i
 ; CHECK: Error{{.*}} not {{.*}} constant
 ; MIN: Error{{.*}} Invalid function record: <6 4 3>
   %e1 = extractelement <4 x i1> %v, i32 4
 ; CHECK: Error{{.*}} not in range
 ; MIN: Error{{.*}} Invalid function record: <6 5 3>
   %e2 = extractelement <4 x i1> %v, i32 9
@@ skipping 164 matching lines @@
 ; CHECK: Error{{.*}} not {{.*}} constant
 ; MIN: Error{{.*}} Invalid function record: <7 5 1 4>
   %r1 = insertelement <4 x float> %v, float 3.0, i32 4
 ; CHECK: Error{{.*}} not in range
 ; MIN: Error{{.*}} Invalid function record: <7 6 2 4>
   %r2 = insertelement <4 x float> %v, float 3.0, i32 44
 ; CHECK: Error{{.*}} not in range
 ; MIN: Error{{.*}} Invalid function record: <7 7 3 4>
   ret <4 x float> %r2
 }