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llvm-cov: Document the llvm-cov tests

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200739 91177308-0d34-0410-b5e6-96231b3b80d8
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Justin Bogner 2014-02-04 06:41:33 +00:00
parent 1a3b25343f
commit f7d0d0798e
1 changed files with 31 additions and 9 deletions
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test/tools/llvm-cov/llvm-cov.test
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@ -1,38 +1,60 @@
# Tests for compatibility between llvm-cov and gcov. These work by
# comparing llvm-cov against reference outputs generated by gcov 4.2.
# "cd" and globbing are unsupported in lit internal runner.
REQUIRES: shell
RUN: rm -rf %t
RUN: mkdir %t
RUN: cd %t
RUN: cp %p/Inputs/test* .
RUN: llvm-cov test.c | diff test_no_options.output -
RUN: llvm-cov test.c -f | diff test_-f.output -
# Basic behaviour with no flags
RUN: llvm-cov test.c | diff -u test_no_options.output -
RUN: diff -aub test_no_options.cpp.gcov test.cpp.gcov
RUN: diff -aub test_no_options.h.gcov test.h.gcov
RUN: llvm-cov test.c -a
# Function summaries. This changes stdout, but not the gcov files.
RUN: llvm-cov test.c -f | diff -u test_-f.output -
RUN: diff -aub test_no_options.cpp.gcov test.cpp.gcov
RUN: diff -aub test_no_options.h.gcov test.h.gcov
# All blocks. This doesn't affect stdout, only the gcov files.
RUN: llvm-cov test.c -a | diff -u test_no_options.output -
RUN: diff -aub test_-a.cpp.gcov test.cpp.gcov
RUN: diff -aub test_-a.h.gcov test.h.gcov
RUN: llvm-cov test.c -a -b | diff test_-b.output -
# This is expected to fail because gcov doesn't actually output real branch or
# call statistics on a per function basis.
RUN: llvm-cov test.c -a -b -f | not diff test_-b_-f.output -
# Branch probabilities.
RUN: llvm-cov test.c -a -b | diff -u test_-b.output -
RUN: diff -aub test_-a_-b.cpp.gcov test.cpp.gcov
RUN: diff -aub test_-a_-b.h.gcov test.h.gcov
RUN: llvm-cov test.c -a -b -u
# Function summaries including branch probabilities.
# FIXME: We don't correctly handle calls when -b and -f are used
# together, so our output differs from gcov. Remove the 'not' from
# this test once this is fixed.
RUN: llvm-cov test.c -a -b -f | not diff -u test_-b_-f.output - >/dev/null
RUN: diff -aub test_-a_-b.cpp.gcov test.cpp.gcov
RUN: diff -aub test_-a_-b.h.gcov test.h.gcov
# Summarize unconditional branches too.
RUN: llvm-cov test.c -a -b -u | diff -u test_-b.output -
RUN: diff -aub test_-a_-b_-u.cpp.gcov test.cpp.gcov
RUN: diff -aub test_-a_-b_-u.h.gcov test.h.gcov
RUN: llvm-cov test.c -a -b -c -u
# Absolute counts for branches.
RUN: llvm-cov test.c -a -b -c -u | diff -u test_-b.output -
RUN: diff -aub test_-a_-b_-c_-u.cpp.gcov test.cpp.gcov
RUN: diff -aub test_-a_-b_-c_-u.h.gcov test.h.gcov
# Invalid gcno file.
RUN: not llvm-cov test.c -gcno=test_read_fail.gcno
# Bad file checksum on gcda.
RUN: not llvm-cov test.c -gcda=test_file_checksum_fail.gcda
# Bad function checksum on gcda
RUN: not llvm-cov test.c -gcda=test_func_checksum_fail.gcda
XFAIL: powerpc64, s390x, mips, sparc