From f7d0d0798ea06dfc2629cd458a273197b6bb73e1 Mon Sep 17 00:00:00 2001 From: Justin Bogner Date: Tue, 4 Feb 2014 06:41:33 +0000 Subject: llvm-cov: Document the llvm-cov tests git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200739 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/tools/llvm-cov/llvm-cov.test | 40 ++++++++++++++++++++++++++++++--------- 1 file changed, 31 insertions(+), 9 deletions(-) diff --git a/test/tools/llvm-cov/llvm-cov.test b/test/tools/llvm-cov/llvm-cov.test index 411ac1f873..cb0c99b747 100644 --- a/test/tools/llvm-cov/llvm-cov.test +++ b/test/tools/llvm-cov/llvm-cov.test @@ -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 + +# 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 -RUN: llvm-cov test.c -a +# 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 + +# 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 -RUN: llvm-cov test.c -a -b -u +# 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 -- cgit v1.2.3