We fseek on our output file in llvm-profdata, which errors on some
systems. Avoid getting into the situation by writing to /dev/null
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This adds support for an indexed instrumentation based profiling
format, which is just a small header and an on disk hash table. This
format will be used by clang's -fprofile-instr-use= for PGO.
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Since the profile can come from 32-bit machines, we need to check the
pointer size. Change the magic number to facilitate this.
Adds tests for reading 32-bit and 64-bit binaries (both big- and
little-endian). The tests write a binary using printf in RUN lines
(like raw-magic-but-no-header.test). Assuming the bots don't complain,
this seems like a better way forward for testing RawInstrProfReader than
committing binary files.
<rdar://problem/16400648>
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Some text shows up on stderr when using guard malloc, and this test
was trying to treat that as input to llvm-profdata show. There's no
reason to pipe stderr into show at all here.
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Cleanup the current binary testcase for profile data.
- Rename it to something more specific.
- Remove the text comparison.
- Check the output of llvm-profdata show.
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Include non-text characters in the magic number so that text files can't
match.
<rdar://problem/15950346>
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Read a raw binary profile that corresponds to a memory dump from the
runtime profile.
The test is a binary file generated from
cfe/trunk/test/Profile/c-general.c with the new compiler-rt runtime and
the matching text version of the input. It includes instructions on how
to regenerate.
<rdar://problem/15950346>
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This isn't a format we'll want to write out in practice, but moving it
to the writer library simplifies llvm-profdata and isolates it from
further changes to the format.
This also allows us to update the tests to not rely on the text output
format.
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This introduces the ProfileData library and updates llvm-profdata to
use this library for reading profiles. InstrProfReader is an abstract
base class that will be subclassed for both the raw instrprof data
from compiler-rt and the efficient instrprof format that will be used
for PGO.
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Chandler voiced some concern with checking this in without some
discussion first. Reverting for now.
This reverts r203703, r203704, r203708, and 203709.
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This replaces the llvm-profdata tool with a version that uses the
recently introduced Profile library. The new tool has the ability to
generate and summarize profdata files as well as merging them.
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Introducing llvm-profdata, a tool for merging profile data generated by
PGO instrumentation in clang.
- The name indicates a file extension of <name>.profdata. Eventually
profile data output by clang should be changed to that extension.
- llvm-profdata merges two profiles. However, the name is more general,
since it will likely pick up more tasks (such as summarizing a single
profile).
- llvm-profdata parses the current text-based format, but will be
updated once we settle on a binary format.
<rdar://problem/15949645>
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