Commit Graph

16 Commits

Author SHA1 Message Date
Roman Lebedev 19ab1817b6
[llvm-reduce] Fix removal of unused llvm intrinsics declarations
ee6e25e439 changed
the delta pass to skip intrinsics, which means we may end up being
left with declarations of intrinsics, that aren't otherwise referenced
in the module. This is obviously unwanted, do drop them.
2021-01-03 01:45:47 +03:00
Matt Arsenault ee6e25e439 llvm-reduce: Don't replace intrinsic calls with undef
These don't really have function bodies to try to eliminate. This also
has a good chance of just producing invalid IR since intrinsics can
have special operand constraints (e.g. metadata arguments aren't valid
for an arbitrary call). This was wasting quite a bit of time producing
and failing on invalid IR when replacing dbg.values with undefs.
2020-10-16 10:10:53 -04:00
Roman Lebedev d4c3f20285
[Reduce] Rewrite function body delta pass again
It is not enough to replace all uses of users of the function with undef,
the users, we only drop instruction users, so they may stick around.

Let's try different approach - first drop bodies for all the functions
we will drop, which should take care of blockaddress issue the previous
rewrite was dealing with; then, after dropping *all* such bodies,
replace remaining uses with undef (thus all the uses are either
outside of functions, or are in kept functions)
and then finally drop functions.

This seems to work, and passes the *existing* test coverage,
but it is possible that a new issue will be discovered later :)

A new (previously crashing) test added.
2020-08-08 23:48:44 +03:00
Roman Lebedev 1bac5101cd
[Reduce] Function reduction: replace all users of function with undef
There may be other users of a function other than CallInsts,
but what's more important, we can't actually replace function pointer
with undef, because for constants, that would not preserve the type
and RAUW would assert.

In particular, that affects blockaddress, however it proves to be
prohibitively complex to come up with a good test involving blockaddress:
we'd need to both ensure that the function body survives until
this pass, and is not interesting in this pass.
2020-07-27 15:39:02 +03:00
Roman Lebedev a39c7ab9c3
[NFCI][llvm-reduce] Cleanup Delta passes to use Oracle abstraction
Summary:
I think, this results in much more understandable/readable flow.
At least the original logic was perhaps the most hard thing for me to grasp when taking an initial look on the delta passes.

Reviewers: nickdesaulniers, dblaikie, diegotf, george.burgess.iv

Reviewed By: nickdesaulniers

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D83287
2020-07-08 12:26:00 +03:00
Simon Pilgrim 457db4036a Cloning.h - reduce AliasAnalysis.h include to forward declarations. NFC.
Fix implicit include dependencies in source files.
2020-06-24 15:48:10 +01:00
David Blaikie c4da7eeccd llvm-reduce: Fix inconsistencies between int/unsigned usage (standardize on int)
llvm-svn: 372270
2019-09-18 22:30:25 +00:00
Reid Kleckner 6d5f0029fc [llvm-reduce] Fix a bug, improve error handling when running test
llvm::sys::ExecuteAndWait can report errors, so let's make use of that.

Second, while iterating uses of functions to remove, a call can appear
multiple times. Use a SetVector so we don't attempt to erase such a call
twice.

llvm-svn: 371653
2019-09-11 20:29:22 +00:00
David Blaikie aac114ca14 llvm-reduce: Remove some unused headers/more narrowly include them
llvm-svn: 371564
2019-09-10 22:31:35 +00:00
David Blaikie 345fbfd749 llvm-remove: Remove "using namespace" in header.
llvm-svn: 371563
2019-09-10 22:10:00 +00:00
Diego Trevino Ferrer c26892538e [Bugpoint redesign] Output option can now print to STDOUT
Summary:
This also changes all the outs() statements to errs() so the output and
progress streams don't get mixed.

This has been added because D64176 had flaky tests, which I believe were because the reduced file was being catted into `FileCheck`, instead of being pass from STDOUT directly.

Reviewers: chandlerc, dblaikie, xbolva00

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D66314

llvm-svn: 369060
2019-08-15 22:39:43 +00:00
Diego Trevino Ferrer 3755579f93 [Bugpoint redesign] Modified Functions pass to consider declarations
Summary: This modification was put in place so the `ReduceMetadata` pass doesn't have to consider debug functions

Reviewers: dblaikie

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D66257

llvm-svn: 368934
2019-08-14 22:22:37 +00:00
Simon Pilgrim bda73ae0bb Fix -Wdocumentation warning (@returns used in void function). NFCI.
llvm-svn: 368693
2019-08-13 13:55:38 +00:00
Diego Trevino Ferrer ddc64eb948 Added Delta IR Reduction Tool
Summary: Tool parses input IR file, and runs the delta debugging algorithm to reduce the functions inside the input file.

Reviewers: alexshap, chandlerc

Subscribers: mgorny, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D63672

> llvm-svn: 368071

llvm-svn: 368358
2019-08-08 22:16:33 +00:00
Diego Trevino Ferrer d4d00ae6a2 Revert Added Delta IR Reduction Tool
This reverts r368071 (git commit a2584978f5bb41973d65a145b0d9459b81e3ac6d)

llvm-svn: 368217
2019-08-07 21:51:54 +00:00
Diego Trevino Ferrer b80c4c82d6 Added Delta IR Reduction Tool
Summary: Tool parses input IR file, and runs the delta debugging algorithm to reduce the functions inside the input file.

Reviewers: alexshap, chandlerc

Subscribers: mgorny, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D63672

> llvm-svn: 368071

llvm-svn: 368214
2019-08-07 21:37:11 +00:00