Commit Graph

378 Commits

Author SHA1 Message Date
Valery Pykhtin 52391ea0b3 [TableGen] fix assert in !cast when used out of definition in a multiclass
Differential Revision: https://reviews.llvm.org/D53068

llvm-svn: 344134
2018-10-10 10:52:57 +00:00
Fangrui Song 0cac726a00 llvm::sort(C.begin(), C.end(), ...) -> llvm::sort(C, ...)
Summary: The convenience wrapper in STLExtras is available since rL342102.

Reviewers: dblaikie, javed.absar, JDevlieghere, andreadb

Subscribers: MatzeB, sanjoy, arsenm, dschuff, mehdi_amini, sdardis, nemanjai, jvesely, nhaehnle, sbc100, jgravelle-google, eraman, aheejin, kbarton, JDevlieghere, javed.absar, gbedwell, jrtc27, mgrang, atanasyan, steven_wu, george.burgess.iv, dexonsmith, kristina, jsji, llvm-commits

Differential Revision: https://reviews.llvm.org/D52573

llvm-svn: 343163
2018-09-27 02:13:45 +00:00
Daniel Sanders f8ecb22dcb [tblgen] Fix undefined behaviour when assigning integers to large bits<n>'s
This code:
  bits<96> X = 0;
was triggering undefined behaviour since it iterates over bits 0..95 and tests
them against the IntInit using 1LL << I.

This patch resolves the undefined behaviour by continuing to treat the IntInit
as a 64-bit value and simply causing all bit tests in excess of 64-bits to report
false. As a result,
  bits<96> X = -1;
will be equivalent to:
  bits<96> X;
  let X{0-63} = -1;
  let X{64-95} = 0;

llvm-svn: 342744
2018-09-21 16:32:49 +00:00
Fangrui Song f78650a8de Remove trailing space
sed -Ei 's/[[:space:]]+$//' include/**/*.{def,h,td} lib/**/*.{cpp,h}

llvm-svn: 338293
2018-07-30 19:41:25 +00:00
Simon Tatham 09f256575b [TableGen] Add missing std::moves to fix build failure.
gcc 4.7 seems to disagree with gcc 5.3 about whether you need to say
'return std::move(thing)' instead of just 'return thing'. All the
json::Arrays and json::Objects that I was implicitly turning into
json::Values by returning them from functions now have explicit
std::move wrappers, so hopefully 4.7 will be happy now.

llvm-svn: 336772
2018-07-11 08:57:56 +00:00
Simon Tatham 6a8c6cadf1 [TableGen] Add a general-purpose JSON backend.
The aim of this backend is to output everything TableGen knows about
the record set, similarly to the default -print-records backend. But
where -print-records produces output in TableGen's input syntax
(convenient for humans to read), this backend produces it as
structured JSON data, which is convenient for loading into standard
scripting languages such as Python, in order to extract information
from the data set in an automated way.

The output data contains a JSON representation of the variable
definitions in output 'def' records, and a few pieces of metadata such
as which of those definitions are tagged with the 'field' prefix and
which defs are derived from which classes. It doesn't dump out
absolutely every piece of knowledge it _could_ produce, such as type
information and complicated arithmetic operator nodes in abstract
superclasses; the main aim is to allow consumers of this JSON dump to
essentially act as new backends, and backends don't generally need to
depend on that kind of data.

The new backend is implemented as an EmitJSON() function similar to
all of llvm-tblgen's other EmitFoo functions, except that it lives in
lib/TableGen instead of utils/TableGen on the basis that I'm expecting
to add it to clang-tblgen too in a future patch.

To test it, I've written a Python script that loads the JSON output
and tests properties of it based on comments in the .td source - more
or less like FileCheck, except that the CHECK: lines have Python
expressions after them instead of textual pattern matches.

Reviewers: nhaehnle

Reviewed By: nhaehnle

Subscribers: arichardson, labath, mgorny, llvm-commits

Differential Revision: https://reviews.llvm.org/D46054

llvm-svn: 336771
2018-07-11 08:40:19 +00:00
Jonas Devlieghere c02bf01f64 [TableGen] Use WithColor for printing errors/warnings
Use the WithColor helper from support to print errors and warnings.

llvm-svn: 335415
2018-06-23 16:48:03 +00:00
Nicolai Haehnle 7d69e0f37d TableGen: Allow foreach in multiclass to depend on template args
Summary:
This also allows inner foreach loops to have a list that depends on
the iteration variable of an outer foreach loop. The test cases show
some very simple examples of how this can be used.

This was perhaps the last remaining major non-orthogonality in the
TableGen frontend.

Change-Id: I79b92d41a5c0e7c03cc8af4000c5e1bda5ef464d

Reviewers: tra, simon_tatham, craig.topper, MartinO, arsenm

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D47431

llvm-svn: 335221
2018-06-21 13:35:44 +00:00
Nicolai Haehnle 01d261f18d TableGen: Streamline the semantics of NAME
Summary:
The new rules are straightforward. The main rules to keep in mind
are:

1. NAME is an implicit template argument of class and multiclass,
   and will be substituted by the name of the instantiating def/defm.

2. The name of a def/defm in a multiclass must contain a reference
   to NAME. If such a reference is not present, it is automatically
   prepended.

And for some additional subtleties, consider these:

3. defm with no name generates a unique name but has no special
   behavior otherwise.

4. def with no name generates an anonymous record, whose name is
   unique but undefined. In particular, the name won't contain a
   reference to NAME.

Keeping rules 1&2 in mind should allow a predictable behavior of
name resolution that is simple to follow.

The old "rules" were rather surprising: sometimes (but not always),
NAME would correspond to the name of the toplevel defm. They were
also plain bonkers when you pushed them to their limits, as the old
version of the TableGen test case shows.

Having NAME correspond to the name of the toplevel defm introduces
"spooky action at a distance" and breaks composability:
refactoring the upper layers of a hierarchy of nested multiclass
instantiations can cause unexpected breakage by changing the value
of NAME at a lower level of the hierarchy. The new rules don't
suffer from this problem.

Some existing .td files have to be adjusted because they ended up
depending on the details of the old implementation.

Change-Id: I694095231565b30f563e6fd0417b41ee01a12589

Reviewers: tra, simon_tatham, craig.topper, MartinO, arsenm, javed.absar

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D47430

llvm-svn: 333900
2018-06-04 14:26:05 +00:00
Nicolai Haehnle e7ae0f48f4 TableGen: add some more helpful error messages
Summary: Change-Id: I6f3dacf675a4126134577616e259696bebdade3a

Reviewers: tra, simon_tatham, craig.topper, MartinO, arsenm

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D47429

Change-Id: I614de12a4c154c6d53c090f2f3e53ad2d09942c5
llvm-svn: 333436
2018-05-29 17:12:20 +00:00
Chandler Carruth 029cea90fa Revert r330742: Let TableGen write output only if it changed, instead of doing so in cmake.
This change causes us to re-run tablegen for every single target on
every single build. This is much, much worse than the problem being
fixed AFAICT.

On my system, it makes a clean rebuild of `llc` with nothing changed go
from .5s to over 8s. On systems with less parallelism, slower file
systems, or high process startup overhead this will be even more
extreme.

The only way I see this could be a win is in clean builds where we churn
the filesystem. But I think incremental rebuild is more important, and
so if we want to re-instate this, it needs to be done in a way that
doesn't trigger constant re-runs of tablegen.

llvm-svn: 331702
2018-05-07 23:41:48 +00:00
Simon Tatham 6a02604ee4 [TableGen] Don't quote variable name when printing !foreach.
An input !foreach expression such as !foreach(a, lst, !add(a, 1))
would be re-emitted by llvm-tblgen -print-records with the first
argument in quotes, giving !foreach("a", lst, !add(a, 1)), which isn't
valid TableGen input syntax.

Reviewers: nhaehnle

Reviewed By: nhaehnle

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D46352

llvm-svn: 331351
2018-05-02 13:17:26 +00:00
Adrian Prantl 5f8f34e459 Remove \brief commands from doxygen comments.
We've been running doxygen with the autobrief option for a couple of
years now. This makes the \brief markers into our comments
redundant. Since they are a visual distraction and we don't want to
encourage more \brief markers in new code either, this patch removes
them all.

Patch produced by

  for i in $(git grep -l '\\brief'); do perl -pi -e 's/\\brief //g' $i & done

Differential Revision: https://reviews.llvm.org/D46290

llvm-svn: 331272
2018-05-01 15:54:18 +00:00
Nico Weber 432a38838d IWYU for llvm-config.h in llvm, additions.
See r331124 for how I made a list of files missing the include.
I then ran this Python script:

    for f in open('filelist.txt'):
        f = f.strip()
        fl = open(f).readlines()

        found = False
        for i in xrange(len(fl)):
            p = '#include "llvm/'
            if not fl[i].startswith(p):
                continue
            if fl[i][len(p):] > 'Config':
                fl.insert(i, '#include "llvm/Config/llvm-config.h"\n')
                found = True
                break
        if not found:
            print 'not found', f
        else:
            open(f, 'w').write(''.join(fl))

and then looked through everything with `svn diff | diffstat -l | xargs -n 1000 gvim -p`
and tried to fix include ordering and whatnot.

No intended behavior change.

llvm-svn: 331184
2018-04-30 14:59:11 +00:00
Nico Weber ebc7c74f2f Let TableGen write output only if it changed, instead of doing so in cmake.
Removes one subprocess and one temp file from the build for each tablegen
invocation.

No intended behavior change.

https://reviews.llvm.org/D45899

llvm-svn: 330742
2018-04-24 17:29:05 +00:00
Mandeep Singh Grang 1b0e2f2a20 [TableGen] Change std::sort to llvm::sort in response to r327219
Summary:
r327219 added wrappers to std::sort which randomly shuffle the container before sorting.
This will help in uncovering non-determinism caused due to undefined sorting
order of objects having the same key.

To make use of that infrastructure we need to invoke llvm::sort instead of std::sort.

Note: This patch is one of a series of patches to replace *all* std::sort to llvm::sort.
Refer the comments section in D44363 for a list of all the required patches.

Reviewers: stoklund, kparzysz, dsanders

Reviewed By: dsanders

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D45144

llvm-svn: 329451
2018-04-06 20:18:05 +00:00
Nicolai Haehnle 87aec1b194 TableGen: Remove redundant loop in ListInit::resolveReferences
Summary:
Recursive lookups are handled by the Resolver, so the loop was purely
a waste of runtime.

Change-Id: I2bd23a68b478aea0bbac1a86ca7635adffa28688

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D44624

llvm-svn: 328118
2018-03-21 17:13:10 +00:00
Nicolai Haehnle 420e28c78c TableGen: Streamline how defs are instantiated
Summary:
Instantiating def's and defm's needs to perform the following steps:

- for defm's, clone multiclass def prototypes and subsitute template args
- for def's and defm's, add subclass definitions, substituting template
  args
- clone the record based on foreach loops and substitute loop iteration
  variables
- override record variables based on the global 'let' stack
- resolve the record name (this should be simple, but unfortunately it's
  not due to existing .td files relying on rather silly implementation
  details)
- for def(m)s in multiclasses, add the unresolved record as a multiclass
  prototype
- for top-level def(m)s, resolve all internal variable references and add
  them to the record keeper and any active defsets

This change streamlines how we go through these steps, by having both
def's and defm's feed into a single addDef() method that handles foreach,
final resolve, and routing the record to the right place.

This happens to make foreach inside of multiclasses work, as the new
test case demonstrates. Previously, foreach inside multiclasses was not
forbidden by the parser, but it was de facto broken.

Another side effect is that the order of "instantiated from" notes in error
messages is reversed, as the modified test case shows. This is arguably
clearer, since the initial error message ends up pointing directly to
whatever triggered the error, and subsequent notes will point to increasingly
outer layers of multiclasses. This is consistent with how C++ compilers
report nested #includes and nested template instantiations.

Change-Id: Ica146d0db2bc133dd7ed88054371becf24320447

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D44478

llvm-svn: 328117
2018-03-21 17:12:53 +00:00
Nicolai Haehnle 2ad19016c0 TableGen: Explicitly forbid self-references to field members
Summary:
Otherwise, patterns like in the test case produce cryptic error
messages about fields being resolved incompletely.

Change-Id: I713c0191f00fe140ad698675803ab1f8823dc5bd

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D44476

llvm-svn: 327850
2018-03-19 14:14:28 +00:00
Nicolai Haehnle 4186cc7c08 TableGen: Check the dynamic type of !cast<Rec>(string)
Summary:
The docs already claim that this happens, but so far it hasn't. As a
consequence, existing TableGen files get this wrong a lot, but luckily
the fixes are all reasonably straightforward.

To make this work with all the existing forms of self-references (since
the true type of a record is only built up over time), the lookup of
self-references in !cast is delayed until the final resolving step.

Change-Id: If5923a72a252ba2fbc81a889d59775df0ef31164

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: wdng, javed.absar, llvm-commits

Differential Revision: https://reviews.llvm.org/D44475

llvm-svn: 327849
2018-03-19 14:14:20 +00:00
Nicolai Haehnle 18f1998a00 TableGen: Explicitly test some cases of self-references and !cast errors
Summary:
These are cases of self-references that exist today in practice. Let's
add tests for them to avoid regressions.

The self-references in PPCInstrInfo.td can be expressed in a simpler
way. Allowing this type of self-reference while at the same time
consistently doing late-resolve even for self-references is problematic
because there are references to fields that aren't in any class. Since
there's no need for this type of self-reference anyway, let's just
remove it.

Change-Id: I914e0b3e1ae7adae33855fac409b536879bc3f62

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: nemanjai, wdng, kbarton, llvm-commits

Differential Revision: https://reviews.llvm.org/D44474

llvm-svn: 327848
2018-03-19 14:14:10 +00:00
Nicolai Haehnle 335c70f55e TableGen: Only fold when some operand made resolve progress
Summary:
Make sure that we always fold immediately, so there's no point in
attempting to re-fold when nothing changes.

Change-Id: I069e1989455b6f2ca8606152f6adc1a5e817f1c8

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D44198

llvm-svn: 327847
2018-03-19 14:14:04 +00:00
Nicolai Haehnle 1eaebc62d7 TableGen: Move GenStrConcat to a helper function in BinOpInit
Summary:
Make it accessible for more users.

Change-Id: Ib05f09ba14e7942ced5d2f24b205efa285e40cd5

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D44196

llvm-svn: 327845
2018-03-19 14:13:54 +00:00
Nicolai Haehnle c47fe129cb TableGen: Remove the cast-from-string-to-variable-reference feature
Summary:
Cast-from-string for records isn't going away, but cast-from-string for
variables is a pretty dodgy feature to have, especially when referencing
template arguments. It's doubtful that this ever worked in a reliable
way, and nobody seems to be using it, so let's get rid of it and get
some related cleanups.

Change-Id: I395ac8a43fef4cf98e611f2f552300d21e99b66a

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D44195

llvm-svn: 327844
2018-03-19 14:13:37 +00:00
Nicolai Haehnle a511dddced TableGen: Explicitly forbid some nestings of class, multiclass, and foreach
These previously all failed one way or another, but now we produce a more
helpful error message.

Change-Id: I8ffd2e87c8e35a5134c3be289e0a1fecaa2bb8ca

Differential revision: https://reviews.llvm.org/D44115

llvm-svn: 327497
2018-03-14 11:01:01 +00:00
Nicolai Haehnle aa9ca691cd TableGen: Add !ne, !le, !lt, !ge, and !gt comparisons
Change-Id: I8e2ece677268972d578a787467f7ef52a1f33a71

Differential revision: https://reviews.llvm.org/D44114

llvm-svn: 327496
2018-03-14 11:00:57 +00:00
Nicolai Haehnle b61c26e614 TableGen: Allow dag operators to be resolved late
Change-Id: I51bb80fd5c48c8ac441ab11e43d43c1b91b4b590

Differential revision: https://reviews.llvm.org/D44113

llvm-svn: 327495
2018-03-14 11:00:48 +00:00
Nicolai Haehnle 77841b159a TableGen: Type-check BinOps
Additionally, allow more than two operands to !con, !add, !and, !or
in the same way as is already allowed for !listconcat and !strconcat.

Change-Id: I9659411f554201b90cd8ed7c7e004d381a66fa93

Differential revision: https://reviews.llvm.org/D44112

llvm-svn: 327494
2018-03-14 11:00:43 +00:00
Nicolai Haehnle ef60a26817 TableGen: Allow ? in lists
This makes using !dag more convenient in some cases.

Change-Id: I0a8c35e15ccd1ecec778fd1c8d64eee38d74517c

Differential revision: https://reviews.llvm.org/D44111

llvm-svn: 327493
2018-03-14 11:00:33 +00:00
Nicolai Haehnle 6c11865638 TableGen: Add !dag function for construction
This allows constructing DAG nodes with programmatically determined
names, and can simplify constructing DAG nodes in other cases as
well.

Also, add documentation and some very simple tests for the already
existing !con.

Change-Id: Ida61cd82e99752548d7109ce8da34d29da56a5f7

Differential revision: https://reviews.llvm.org/D44110

llvm-svn: 327492
2018-03-14 11:00:26 +00:00
Nicolai Haehnle 169ec09cb7 TableGen: Remove space at EOL in TGLexer.{h,cpp}
Change-Id: Ica5f39470174e85f173d3b6db95789033f75ce17
llvm-svn: 327158
2018-03-09 18:32:04 +00:00
Nicolai Haehnle fcd6525a45 TableGen: Add a defset statement
Allows capturing a list of concrete instantiated defs.

This can be combined with foreach to create parallel sets of def
instantiations with less repetition in the source. This purpose is
largely also served by multiclasses, but in some cases multiclasses
can't be used.

The motivating example for this change is having a large set of
intrinsics, which are generated from the IntrinsicsBackend.td file
included by Intrinsics.td, and a corresponding set of instruction
selection patterns, which are generated via the backend's .td files.

Multiclasses cannot be used to eliminate the redundancy in this case,
because a multiclass cannot span both LLVM's common .td files and
the backend .td files at the same time.

Change-Id: I879e35042dceea542a5e6776fad23c5e0e69e76b

Differential revision: https://reviews.llvm.org/D44109

llvm-svn: 327121
2018-03-09 12:24:42 +00:00
Nicolai Haehnle 8aa9d5839d TableGen: Allow arbitrary list values as ranges of foreach
The changes to FieldInit are required to make field references (Def.field)
work inside a ForeachDeclaration: previously, Def.field wasn't resolved
immediately when Def was already a fully resolved DefInit.

Change-Id: I9875baec2fc5aac8c2b249e45b9cf18c65ae699b
llvm-svn: 327120
2018-03-09 12:24:30 +00:00
Nicolai Haehnle 2435855abe TableGen: Remove unused ParseForeachMode
Use the default ParseValueMode instead of ParseForeachMode when
parsing the rule

  ForeachDeclaration ::= ID '=' '[' ValueList ']'

because the only difference between the two is how an open brace '{'
is handled at the end. In the context of foreach, the 'in' keyword
will appear after the ForeachDeclaration, so this special handling
of '{' is not required.

Change-Id: I4d86bb73bab9ec26752e1273e5213df77cf28d1d
llvm-svn: 327119
2018-03-09 12:24:20 +00:00
Nicolai Haehnle 64da699036 TableGen: More helpful error messages
Change-Id: Ic78afd0cd765fdb4cf1b7ecfb6bba22653ce6d29
llvm-svn: 327118
2018-03-09 12:24:14 +00:00
Nicolai Haehnle b537605956 TableGen: add !isa operation
Change-Id: Iddb724c3ae706d82933a2d82c91d07e0e36b30e3

Differential revision: https://reviews.llvm.org/D44105

llvm-svn: 327117
2018-03-09 12:24:06 +00:00
Nicolai Haehnle d34f6843aa TableGen: Add !foldl operation
Change-Id: I63d67bf6e0b315e2d3360e47e3b62c9517f38987
llvm-svn: 326790
2018-03-06 13:49:16 +00:00
Nicolai Haehnle 616635022a TableGen: Remove the ResolveFirst mechanism
Summary:
It is no longer used.

Change-Id: I1e47267d1975d43ad43acd6347f54e958e3b6c86

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D43757

llvm-svn: 326789
2018-03-06 13:49:06 +00:00
Nicolai Haehnle d4c0a5d08d TableGen: Delay instantiating inline anonymous records
Summary:
Only instantiate anonymous records once all variable references in template
arguments have been resolved. This allows patterns like the new test case,
which in practice can appear in expressions like:

  class IntrinsicTypeProfile<list<LLVMType> ty, int shift> {
    list<LLVMType> types =
      !listconcat(ty, [llvm_any_ty, LLVMMatchType<shift>]);
  }

  class FooIntrinsic<IntrinsicTypeProfile P, ...>
    : Intrinsic<..., P.types, ...>;

Without this change, the anonymous LLVMMatchType instantiation would
never get resolved.

Another consequence of this change is that anonymous inline
instantiations are uniqued via the folding set of the newly introduced
VarDefInit.

Change-Id: I7a7041a20e297cf98c9109b28d85e64e176c932a

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D43756

llvm-svn: 326788
2018-03-06 13:49:01 +00:00
Nicolai Haehnle 73355bcd2a TableGen: Move getNewAnonymousName into RecordKeeper
Summary:
So that we will be able to generate new anonymous names more easily
outside the parser as well.

Change-Id: I28f396a7bdbc3ff0c665d466abbd3d31376e21b4

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D43755

llvm-svn: 326787
2018-03-06 13:48:54 +00:00
Nicolai Haehnle 0f529885fa TableGen: Explicitly check whether a record has been resolved
Summary:
There are various places where resolving and constant folds can
get stuck, especially around casts. We don't always signal an
error for those, because in many cases they can legitimately
occur without being an error in the "untaken branch" of an !if.

Change-Id: I3befc0e4234c8e6cc61190504702918c9f29ce5c

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D43754

llvm-svn: 326786
2018-03-06 13:48:47 +00:00
Nicolai Haehnle dfda9dcc1d TableGen: Allow !cast of records, cleanup conversion machinery
Summary:
Distinguish two relationships between types: is-a and convertible-to.
For example, a bit is not an int or vice versa, but they can be
converted into each other (with range checks that you can think of
as "dynamic": unlike other type checks, those range checks do not
happen during parsing, but only once the final values have been
established).

Actually converting initializers between types is subtle: even
when values of type A can be converted to type B (e.g. int into
string), it may not be possible to do so with a concrete initializer
(e.g., a VarInit that refers to a variable of type int cannot
be immediately converted to a string).

For this reason, distinguish between getCastTo and convertInitializerTo:
the latter implements the actual conversion when appropriate, while
the former will first try to do the actual conversion and fall back
to introducing a !cast operation so that the conversion will be
delayed until variable references have been resolved.

To make the approach of adding !cast operations to work, !cast needs
to fallback to convertInitializerTo when the special string <-> record
logic does not apply.

This enables casting records to a subclass, although that new
functionality is only truly useful together with !isa, which will be
added in a later change.

The test is removed because it uses !srl on a bit sequence,
which cannot really be supported consistently, but luckily
isn't used anywhere either.

Change-Id: I98168bf52649176654ed2ec61a29bdb29970cfe7

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D43753

llvm-svn: 326785
2018-03-06 13:48:39 +00:00
Nicolai Haehnle 9a84a50913 TableGen: Simplify BitsInit::resolveReferences
Summary:
No functional change intended. The removed code has a loop for
recursive resolving, which is superseded by the recursive
resolving done by the Resolver implementations.

Add a test case which was broken by an earlier version of this
change.

Change-Id: Ib208d037b77a8bbb725977f1388601fc984723d8

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D43655

llvm-svn: 326784
2018-03-06 13:48:30 +00:00
Nicolai Haehnle 13080fd14e TableGen: Generalize record types to fix typeIsConvertibleTo et al.
Summary:
Allow RecordRecTy to represent the type "subclass of N superclasses",
where N may be zero. Furthermore, generate RecordRecTy instances only
with actual classes in the list.

Keeping track of multiple superclasses is required to resolve the type
of a list correctly in some cases. The old code relied on the incorrect
behavior of typeIsConvertibleTo, and an earlier version of this change
relied on a modified ordering of superclasses (it was committed in
r325884 and then reverted because unfortunately some of clang-tblgen's
backends depend on the ordering).

Previously, the DefInit for each Record would have a RecordRecTy of
that Record as its type. Now, all defs with the same superclasses will
share the same type.

This allows us to be more consistent about type checks involving records:

- typeIsConvertibleTo actually requires the LHS to be a subtype of the
  RHS

- resolveTypes will return the least supertype of given record types in
  all cases

- different record types in the two branches of an !if are handled
  correctly

Add a test that used to be accepted without flagging the obvious type
error.

Change-Id: Ib366db1a4e6a079f1a0851e469b402cddae76714

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D43680

llvm-svn: 326783
2018-03-06 13:48:20 +00:00
Nicolai Haehnle 7d697857cd TableGen: Resolve all template args simultaneously in ResolveMulticlassDefARgs
Summary:
Use the new resolver interface more explicitly, and avoid traversing
all the initializers multiple times.

Change-Id: I679e86988b309d19f25e6cca8b0b14ea150198a6

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D43654

llvm-svn: 326708
2018-03-05 15:21:19 +00:00
Nicolai Haehnle 1faf8689d7 TableGen: Resolve all template args simultaneously in AddSubMultiClass
Summary:
Use the new resolver interface more explicitly, and avoid traversing
all the initializers multiple times.

Change-Id: Ia4dcc6d42dd8b65e6079d318c6a202f36f320fee

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D43653

llvm-svn: 326707
2018-03-05 15:21:15 +00:00
Nicolai Haehnle b0cf9e93a6 TableGen: Resolve all template args simultaneously in AddSubClass
Summary:
Use the new resolver interface more explicitly, and avoid traversing
all the initializers multiple times.

Add a test case for a pattern that was broken by an earlier version
of this change.

An additional change is that we now remove *all* template arguments
after resolving them.

Change-Id: I86c828c8cc84c18b052dfe0f64c0d5cbf3c4e13c

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D43652

llvm-svn: 326706
2018-03-05 15:21:11 +00:00
Nicolai Haehnle 8ebf7e4dfa TableGen: Reimplement !foreach using the resolving mechanism
Summary:
This changes the syntax of !foreach so that the first "parameter" is
a new syntactic variable: !foreach(x, lst, expr) will define the
variable x within the scope of expr, and evaluation of the !foreach
will substitute elements of the given list (or dag) for x in expr.

Aside from leading to a nicer syntax, this allows more complex
expressions where x is deeply nested, or even constant expressions
in which x does not occur at all.

!foreach is currently not actually used anywhere in trunk, but I
plan to use it in the AMDGPU backend. If out-of-tree targets are
using it, they can adjust to the new syntax very easily.

Change-Id: Ib966694d8ab6542279d6bc358b6f4d767945a805

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: wdng, llvm-commits, tpr

Differential Revision: https://reviews.llvm.org/D43651

llvm-svn: 326705
2018-03-05 15:21:04 +00:00
Nicolai Haehnle 0b0eaf7ee2 TableGen: Introduce an abstract variable resolver interface
Summary:
The intention is to allow us to more easily restructure how resolving is
done, e.g. resolving multiple variables simultaneously, or using the
resolving mechanism to implement !foreach.

Change-Id: I4b976b54a32e240ad4f562f7eb86a4d663a20ea8

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D43564

llvm-svn: 326704
2018-03-05 15:20:51 +00:00
Nicolai Haehnle 3c80e4c514 TableGen: Allow NAME in template arguments in defm in multiclass
Summary:
NAME has already worked for def in a multiclass, since the (protoype)
record including its NAME variable is created before parsing the
superclasses. Since defm's do not have an associated single record,
support for NAME has to be implemented differently here.

Original test cases provided by Artem Belevich (tra)

Change-Id: I933b74f328c0ff202e7dc23a35b78f3505760cc9

Reviewers: arsenm, craig.topper, tra, MartinO

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D43656

llvm-svn: 326700
2018-03-05 14:01:38 +00:00