Tests for instrumentation profile bad encoding.

1- Detect invalid count
RUN: not llvm-profdata show %p/Inputs/invalid-count-later.proftext 2>&1 | FileCheck %s --check-prefix=INVALID-COUNT-LATER
RUN: not llvm-profdata merge %p/Inputs/invalid-count-later.proftext %p/Inputs/invalid-count-later.profdata -o %t.out 2>&1 | FileCheck %s --check-prefix=INVALID-COUNT-LATER
INVALID-COUNT-LATER: error: {{.*}}invalid-count-later.proftext: Malformed instrumentation profile data

2- Detect bad hash
RUN: not llvm-profdata show %p/Inputs/bad-hash.proftext 2>&1 | FileCheck %s --check-prefix=BAD-HASH
RUN: not llvm-profdata merge %p/Inputs/bad-hash.proftext %p/Inputs/bad-hash.proftext -o %t.out 2>&1 | FileCheck %s --check-prefix=BAD-HASH
BAD-HASH: error: {{.*}}bad-hash.proftext: Malformed instrumentation profile data

3- Detect no counts
RUN: not llvm-profdata show %p/Inputs/no-counts.proftext 2>&1 | FileCheck %s --check-prefix=NO-COUNTS
NO-COUNTS: error: {{.*}}no-counts.proftext: Malformed instrumentation profile data

4- Detect binary input
RUN: not llvm-profdata show %p/Inputs/text-format-errors.text.bin 2>&1 | FileCheck %s --check-prefix=BINARY
BINARY: error: {{.+}}: Unrecognized instrumentation profile encoding format
BINARY: Perhaps you forgot to use the -sample option?