Commit Graph

5547 Commits

Author SHA1 Message Date
Philip Reames c88d732822 [GC] Document the recently added PlaceSafepoints and RewriteGCForStatepoints passes
llvm-svn: 230420
2015-02-25 01:23:59 +00:00
Philip Reames c609a5927c Fix consistently wrong sphinx markup
I'd been using '' where I should have been using ``.

llvm-svn: 230407
2015-02-25 00:22:07 +00:00
Philip Reames e0dd0f23b8 Update the GC docs to explicitly mention both gcroot and gc.statepoint
Also, fix confusing bit of the gcroot documentation that bit me personally.

llvm-svn: 230405
2015-02-25 00:18:04 +00:00
Philip Reames c01272807b [GC] Sync documentation with code naming
Fixing an issue pointed out by Sean Silva.  Thanks!

llvm-svn: 230403
2015-02-24 23:57:26 +00:00
Philip Reames 50e9aed9e3 More GC documentation cleanup
llvm-svn: 230402
2015-02-24 23:51:37 +00:00
Philip Reames 3826319e13 More GC doc cleanup
Mostly minor wording changes for readability.  Nothing major to see here.

llvm-svn: 230397
2015-02-24 23:34:24 +00:00
Peter Collingbourne 1baeaa395a LowerBitSets: Introduce global layout builder.
The builder is based on a layout algorithm that tries to keep members of
small bit sets together. The new layout compresses Chromium's bit sets to
around 15% of their original size.

Differential Revision: http://reviews.llvm.org/D7796

llvm-svn: 230394
2015-02-24 23:17:02 +00:00
Philip Reames 03f38362aa Improve the getting started instructions in the GC docs
This is still gcroot vs gc.statepoint agnostic.  I'm just trying to clarify the general documentation at this point.

llvm-svn: 230393
2015-02-24 23:12:27 +00:00
Hans Wennborg 7088319043 ReleaseNotes: add notes about VS2014 Update 4 requirement
llvm-svn: 230363
2015-02-24 20:36:40 +00:00
Arch D. Robison 96cf7abf4d Fix typo: qual -> equal
llvm-svn: 230361
2015-02-24 20:11:49 +00:00
Philip Reames e78cf557a3 Starting to cleanup the garbage collection documentation
In this change:
- Put the getting started section first
- Create a dedicated section to document the built in collector strategies
- Move discuss of ShadowStack into new section
- Add placeholders for erlang, ocaml, and statepoint-example collectors

There will be many more changes following.  I plan on full integrating the documentation for gc.statepoint and gc.root.  I want to make it much clearer on how to get started and what users should expect in terms of effort.

llvm-svn: 230359
2015-02-24 19:44:46 +00:00
Nico Weber 932c1f4dc8 Try to fix reST markup for an external link.
llvm-svn: 230200
2015-02-23 03:31:29 +00:00
Justin Bogner 08f36fd61d docs: Mention that assertions must be enabled to use the -stats flag
Patch by Rob Stewart. Thanks!

llvm-svn: 230144
2015-02-21 20:53:36 +00:00
Peter Collingbourne e6909c8e8b Introduce bitset metadata format and bitset lowering pass.
This patch introduces a new mechanism that allows IR modules to co-operatively
build pointer sets corresponding to addresses within a given set of
globals. One particular use case for this is to allow a C++ program to
efficiently verify (at each call site) that a vtable pointer is in the set
of valid vtable pointers for the class or its derived classes. One way of
doing this is for a toolchain component to build, for each class, a bit set
that maps to the memory region allocated for the vtables, such that each 1
bit in the bit set maps to a valid vtable for that class, and lay out the
vtables next to each other, to minimize the total size of the bit sets.

The patch introduces a metadata format for representing pointer sets, an
'@llvm.bitset.test' intrinsic and an LTO lowering pass that lays out the globals
and builds the bitsets, and documents the new feature.

Differential Revision: http://reviews.llvm.org/D7288

llvm-svn: 230054
2015-02-20 20:30:47 +00:00
Eric Christopher 1e61ffddc7 Fix grammar in documentation.
Patch by Ralph Campbell!

llvm-svn: 229884
2015-02-19 18:46:25 +00:00
Benjamin Kramer 499473c201 Document that defaulted & deleted methods and explicit conversions are allowed now.
llvm-svn: 229369
2015-02-16 10:28:41 +00:00
Benjamin Kramer bec02ccdea Remove LLVM_HAS_VARIADIC_TEMPLATES and all the faux variadic workarounds guarded by it.
We no longer support compilers without variadic template support.

llvm-svn: 229324
2015-02-15 19:34:28 +00:00
Benjamin Kramer de1a193d24 Update the docs to require at least MSVC 2013.
llvm-svn: 229323
2015-02-15 19:34:17 +00:00
Tom Stellard 3236c72458 Help: Document how to build and install with CMake.
Resolves PR21569.

Patch by: Stephen Kelly

llvm-svn: 229122
2015-02-13 16:15:32 +00:00
Tom Stellard 94d1521fcd Help: Document the minimum CMake version required.
Patch by: Stephen Kelly

llvm-svn: 229121
2015-02-13 16:15:29 +00:00
Reid Kleckner 96d011315a Don't promote asynch EH invokes of nounwind functions to calls
If the landingpad of the invoke is using a personality function that
catches asynch exceptions, then it can catch a trap.

Also add some landingpads to invalid LLVM IR test cases that lack them.

Over-the-shoulder reviewed by David Majnemer.

llvm-svn: 228782
2015-02-11 01:23:16 +00:00
Nico Weber 43f1836535 fix docs typo
llvm-svn: 228741
2015-02-10 20:43:54 +00:00
Andrew Kaylor 78b53dbcc1 Adding support for llvm.eh.begincatch and llvm.eh.endcatch intrinsics and beginning the documentation of native Windows exception handling.
Differential Revision: http://reviews.llvm.org/D7398

llvm-svn: 228733
2015-02-10 19:52:43 +00:00
Renato Golin 1703a68283 Fix typo in cmake example docs
Patch by Vinicius Tinti.

llvm-svn: 228690
2015-02-10 14:15:58 +00:00
Mehdi Amini 87661fb963 [DOC] Asserts are only enabled in Debug build, update the doc accordingly
Summary:
The CMake configuration is explicitely looking for Debug build, all the
other variant disable assertions.

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D7359

From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 228653
2015-02-10 02:04:29 +00:00
Duncan P. N. Exon Smith b407bb2789 DebugInfo: Remove DW_TAG_constant
Remove handling for DW_TAG_constant.  We started producing it in
r110656, but reverted that in r110876 without dropping the support.
Finish the job.

llvm-svn: 228623
2015-02-09 22:48:04 +00:00
David Blaikie 4a696b0e87 Rename the 'Extending the Language: Debug Information' to 'Adding Debug Information' since this isn't actually modifying/extending the language.
llvm-svn: 228512
2015-02-07 23:23:43 +00:00
Jonathan Roelofs c990459b07 Fix docs typo regarding lit.local.cfg files
llvm-svn: 228499
2015-02-07 17:18:26 +00:00
Sean Silva b8d41c5d33 [docs][LLVM-style RTTI] Add a mention of multiple inheritance.
llvm-svn: 228479
2015-02-07 01:16:26 +00:00
Sean Silva b6472fe3da [docs] Put an explicit link to InAlloca.rst
llvm-svn: 228192
2015-02-04 20:51:19 +00:00
Peter Collingbourne 69ba0167b3 Misc documentation/comment fixes.
llvm-svn: 228093
2015-02-04 00:42:45 +00:00
Yunzhong Gao 4cb1a8e52b Remove the preverify pass from the documentation now that it has been removed
since r199487.

llvm-svn: 227608
2015-01-30 20:51:09 +00:00
Philip Reames 23cf2e2f97 Remove gc.root's performCustomLowering
This is a refactoring to restructure the single user of performCustomLowering as a specific lowering pass and remove the custom lowering hook entirely.

Before this change, the LowerIntrinsics pass (note to self: rename!) was essentially acting as a pass manager, but without being structured in terms of passes. Instead, it proxied calls to a set of GCStrategies internally. This adds a lot of conceptual complexity (i.e. GCStrategies are stateful!) for very little benefit. Since there's been interest in keeping the ShadowStackGC working, I extracting it's custom lowering pass into a dedicated pass and just added that to the pass order. It will only run for functions which opt-in to that gc.

I wasn't able to find an easy way to preserve the runtime registration of custom lowering functionality. Given that no user of this exists that I'm aware of, I made the choice to just remove that. If someone really cares, we can look at restoring it via dynamic pass registration in the future.

Note that despite the large diff, none of the lowering code actual changes. I added the framing needed to make it a pass and rename the class, but that's it.

Differential Revision: http://reviews.llvm.org/D7218

llvm-svn: 227351
2015-01-28 19:28:03 +00:00
Sean Silva 52c7dcd55d [docs] Use slightly more proper .rst markup
Again, I'd like to emphasize to everyone that this sort of markup change
is *not* what you should be concerned about when writing docs. Focus on
*content*.

I applaud Chandler for focusing on the fantastic content of this new
section!

llvm-svn: 227305
2015-01-28 10:36:41 +00:00
Sean Silva b1548edf25 [docs] [cleanup] No need for a comment around C++11 override
llvm-svn: 227304
2015-01-28 10:26:29 +00:00
Chandler Carruth 064dc3333f Introduce a section to the programmers manual about type hierarchies,
polymorphism, and virtual dispatch.

This is essentially trying to explain the emerging design techniques
being used in LLVM these days somewhere more accessible than the
comments on a particular piece of infrastructure. It covers the
"concepts-based polymorphism" that caused some confusion during initial
reviews of the new pass manager as well as the tagged-dispatch mechanism
used pervasively in LLVM and Clang.

Perhaps most notably, I've tried to provide some criteria to help
developers choose between these options when designing new pieces of
infrastructure.

Differential Revision: http://reviews.llvm.org/D7191

llvm-svn: 227292
2015-01-28 03:04:54 +00:00
Simon Atanasyan 4685c839d4 [docs] Add link to the MIPS 64-bit ELF object file specification
llvm-svn: 227050
2015-01-25 16:20:30 +00:00
Charlie Turner d415cc8198 Fixup debug information references.
llvm-svn: 227020
2015-01-24 21:51:21 +00:00
Charlie Turner 6cba064414 Update references to lines of code count.
The number of lines of code in Kaleidoscope has risen from the
previously reported 700 to 986 according to the cloc tool. This tools
was run on the toy.cpp file from Chapter 8.

llvm-svn: 227019
2015-01-24 21:51:17 +00:00
Ramkumar Ramachandra 75a4f35b26 Intrinsics: introduce llvm_any_ty aka ValueType Any
Specifically, gc.result benefits from this greatly. Instead of:

gc.result.int.*
gc.result.float.*
gc.result.ptr.*
...

We now have a gc.result.* that can specialize to literally any type.

Differential Revision: http://reviews.llvm.org/D7020

llvm-svn: 226857
2015-01-22 20:14:38 +00:00
Paul Robinson 343e496473 Explicitly describe '///' versus '//' comment delimiters.
llvm-svn: 226750
2015-01-22 00:19:56 +00:00
Chandler Carruth 4f8f307c77 [PM] Split the LoopInfo object apart from the legacy pass, creating
a LoopInfoWrapperPass to wire the object up to the legacy pass manager.

This switches all the clients of LoopInfo over and paves the way to port
LoopInfo to the new pass manager. No functionality change is intended
with this iteration.

llvm-svn: 226373
2015-01-17 14:16:18 +00:00
Hans Wennborg 8888d5b32c ProgrammersManual.rst: fix a typo
llvm-svn: 226367
2015-01-17 03:19:21 +00:00
Hal Finkel 52f7c018d3 [PowerPC] Adjust PatchPoints for ppc64le
Bill Schmidt pointed out that some adjustments would be needed to properly
support powerpc64le (using the ELF V2 ABI). For one thing, R11 is not available
as a scratch register, so we need to use R12. R12 is also available under ELF
V1, so to maintain consistency, I flipped the order to make R12 the first
scratch register in the array under both ABIs.

llvm-svn: 226247
2015-01-16 04:40:58 +00:00
Hans Wennborg ef818c141f ReleaseNotes.rst: bump version to 3.7
The 3.6 notes are now in the 3.6 branch.

llvm-svn: 226007
2015-01-14 18:07:30 +00:00
Hans Wennborg d94a5f09dd Trunk is now 3.7.0svn
llvm-svn: 226004
2015-01-14 17:38:03 +00:00
Sanjay Patel 1ed2bb592a fix typos
llvm-svn: 225991
2015-01-14 16:03:58 +00:00
Mehdi Amini d8976b8ed3 SelectionDAG: add a -filter-view-dags option to llc
This option takes the name of the basic block you want to visualize
with -view-*-dags

Differential Revision: http://reviews.llvm.org/D6948

llvm-svn: 225953
2015-01-14 06:03:18 +00:00
Hal Finkel 934361a4b8 Revert "r225811 - Revert "r225808 - [PowerPC] Add StackMap/PatchPoint support""
This re-applies r225808, fixed to avoid problems with SDAG dependencies along
with the preceding fix to ScheduleDAGSDNodes::RegDefIter::InitNodeNumDefs.
These problems caused the original regression tests to assert/segfault on many
(but not all) systems.

Original commit message:

This commit does two things:

 1. Refactors PPCFastISel to use more of the common infrastructure for call
    lowering (this lets us take advantage of this common code for lowering some
    common intrinsics, stackmap/patchpoint among them).

 2. Adds support for stackmap/patchpoint lowering. For the most part, this is
    very similar to the support in the AArch64 target, with the obvious differences
    (different registers, NOP instructions, etc.). The test cases are adapted
    from the AArch64 test cases.

One difference of note is that the patchpoint call sequence takes 24 bytes, so
you can't use less than that (on AArch64 you can go down to 16). Also, as noted
in the docs, we take the patchpoint address to be the actual code address
(assuming the call is local in the TOC-sharing sense), which should yield
higher performance than generating the full cross-DSO indirect-call sequence
and is likely just as useful for JITed code (if not, we'll change it).

StackMaps and Patchpoints are still marked as experimental, and so this support
is doubly experimental. So go ahead and experiment!

llvm-svn: 225909
2015-01-14 01:07:51 +00:00
Duncan P. N. Exon Smith 6a4848324b AsmParser/Bitcode: Add support for MDLocation
This adds assembly and bitcode support for `MDLocation`.  The assembly
side is rather big, since this is the first `MDNode` subclass (that
isn't `MDTuple`).  Part of PR21433.

(If you're wondering where the mountains of testcase updates are, we
don't need them until I update `DILocation` and `DebugLoc` to actually
use this class.)

llvm-svn: 225830
2015-01-13 21:10:44 +00:00