279 Commits

Author SHA1 Message Date
Nicola Zaghen
0818e789cb Rename DEBUG macro to LLVM_DEBUG.
The DEBUG() macro is very generic so it might clash with other projects.
The renaming was done as follows:
- git grep -l 'DEBUG' | xargs sed -i 's/\bDEBUG\s\?(/LLVM_DEBUG(/g'
- git diff -U0 master | ../clang/tools/clang-format/clang-format-diff.py -i -p1 -style LLVM
- Manual change to APInt
- Manually chage DOCS as regex doesn't match it.

In the transition period the DEBUG() macro is still present and aliased
to the LLVM_DEBUG() one.

Differential Revision: https://reviews.llvm.org/D43624



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@332240 91177308-0d34-0410-b5e6-96231b3b80d8
2018-05-14 12:53:11 +00:00
Serge Pavlov
06c71d8a6f Report fatal error in the case of out of memory
This is the second part of recommit of r325224. The previous part was
committed in r325426, which deals with C++ memory allocation. Solution
for C memory allocation involved functions `llvm::malloc` and similar.
This was a fragile solution because it caused ambiguity errors in some
cases. In this commit the new functions have names like `llvm::safe_malloc`.

The relevant part of original comment is below, updated for new function
names.

Analysis of fails in the case of out of memory errors can be tricky on
Windows. Such error emerges at the point where memory allocation function
fails, but manifests itself when null pointer is used. These two points
may be distant from each other. Besides, next runs may not exhibit
allocation error.

In some cases memory is allocated by a call to some of C allocation
functions, malloc, calloc and realloc. They are used for interoperability
with C code, when allocated object has variable size and when it is
necessary to avoid call of constructors. In many calls the result is not
checked for null pointer. To simplify checks, new functions are defined
in the namespace 'llvm': `safe_malloc`, `safe_calloc` and `safe_realloc`.
They behave as corresponding standard functions but produce fatal error if
allocation fails. This change replaces the standard functions like 'malloc'
in the cases when the result of the allocation function is not checked
for null pointer.

Finally, there are plain C code, that uses malloc and similar functions. If
the result is not checked, assert statement is added.

Differential Revision: https://reviews.llvm.org/D43010


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@325551 91177308-0d34-0410-b5e6-96231b3b80d8
2018-02-20 05:41:26 +00:00
Serge Pavlov
165fd931ac Revert r325224 "Report fatal error in the case of out of memory"
It caused fails on some buildbots.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@325227 91177308-0d34-0410-b5e6-96231b3b80d8
2018-02-15 09:45:59 +00:00
Serge Pavlov
ca451d02e4 Report fatal error in the case of out of memory
Analysis of fails in the case of out of memory errors can be tricky on
Windows. Such error emerges at the point where memory allocation function
fails, but manifests itself when null pointer is used. These two points
may be distant from each other. Besides, next runs may not exhibit
allocation error.

Usual programming practice does not require checking result of 'operator
new' because it throws 'std::bad_alloc' in the case of allocation error.
However, LLVM is usually built with exceptions turned off, so 'new' can
return null pointer. This change installs custom new handler, which causes
fatal error in the case of out of memory. The handler is installed
automatically prior to call to 'main' during construction of a static
object defined in 'lib/Support/ErrorHandling.cpp'. If the application does
not use this file, the handler may be installed manually by a call to
'llvm::install_out_of_memory_new_handler', declared in
'include/llvm/Support/ErrorHandling.h".

There are calls to C allocation functions, malloc, calloc and realloc.
They are used for interoperability with C code, when allocated object has
variable size and when it is necessary to avoid call of constructors. In
many calls the result is not checked against null pointer. To simplify
checks, new functions are defined in the namespace 'llvm' with the
same names as these C function. These functions produce fatal error if
allocation fails. User should use 'llvm::malloc' instead of 'std::malloc'
in order to use the safe variant. This change replaces 'std::malloc'
in the cases when the result of allocation function is not checked against
null pointer.

Finally, there are plain C code, that uses malloc and similar functions. If
the result is not checked, assert statements are added.

Differential Revision: https://reviews.llvm.org/D43010


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@325224 91177308-0d34-0410-b5e6-96231b3b80d8
2018-02-15 09:20:26 +00:00
Craig Topper
a7fa95c0e5 [APInt] Use inplace shift methods where possible. NFCI
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301612 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-28 03:36:24 +00:00
Renato Golin
d907744fff Revert "[APInt] Fix a few places that use APInt::getRawData to operate within the normal API."
This reverts commit r301105, 4, 3 and 1, as a follow up of the previous
revert, which broke even more bots.

For reference:
Revert "[APInt] Use operator<<= where possible. NFC"
Revert "[APInt] Use operator<<= instead of shl where possible. NFC"
Revert "[APInt] Use ashInPlace where possible."

PR32754.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301111 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-23 12:15:30 +00:00
Craig Topper
5e17d2e85c [APInt] Use operator<<= instead of shl where possible. NFC
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301103 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-23 05:18:31 +00:00
Craig Topper
df22034939 [APInt] Use lshrInPlace to replace lshr where possible
This patch uses lshrInPlace to replace code where the object that lshr is called on is being overwritten with the result.

This adds an lshrInPlace(const APInt &) version as well.

Differential Revision: https://reviews.llvm.org/D32155




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300566 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-18 17:14:21 +00:00
Chandler Carruth
ddfada260a [IR] Redesign the case iterator in SwitchInst to actually be an iterator
and to expose a handle to represent the actual case rather than having
the iterator return a reference to itself.

All of this allows the iterator to be used with common STL facilities,
standard algorithms, etc.

Doing this exposed some missing facilities in the iterator facade that
I've fixed and required some work to the actual iterator to fully
support the necessary API.

Differential Revision: https://reviews.llvm.org/D31548

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300032 91177308-0d34-0410-b5e6-96231b3b80d8
2017-04-12 07:27:28 +00:00
Peter Collingbourne
06115803f9 IR: Change the gep_type_iterator API to avoid always exposing the "current" type.
Instead, expose whether the current type is an array or a struct, if an array
what the upper bound is, and if a struct the struct type itself. This is
in preparation for a later change which will make PointerType derive from
Type rather than SequentialType.

Differential Revision: https://reviews.llvm.org/D26594

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@288458 91177308-0d34-0410-b5e6-96231b3b80d8
2016-12-02 02:24:42 +00:00
Davide Italiano
ffd4b26c0e [ExecutionEngine] Garbage collect some dead (and unsafe) code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251042 91177308-0d34-0410-b5e6-96231b3b80d8
2015-10-22 18:46:27 +00:00
Duncan P. N. Exon Smith
ad48b01437 Interpreter: Remove implicit ilist iterator conversions, NFC
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@250185 91177308-0d34-0410-b5e6-96231b3b80d8
2015-10-13 17:33:41 +00:00
Craig Topper
84bbcfe200 De-constify pointers to Type since they can't be modified. NFC
This was already done in most places a while ago. This just fixes the ones that crept in over time.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243842 91177308-0d34-0410-b5e6-96231b3b80d8
2015-08-01 22:20:21 +00:00
Mehdi Amini
e02fce0ac9 Make ExecutionEngine owning a DataLayout
Summary:
This change is part of a series of commits dedicated to have a single
DataLayout during compilation by using always the one owned by the
module.

The ExecutionEngine will act as an exception and will be unsafe to
be reused across context. We don't enforce this rule but undefined
behavior can occurs if the user tries to do it.

Reviewers: lhames

Subscribers: echristo, llvm-commits, rafael, yaron.keren

Differential Revision: http://reviews.llvm.org/D11110

From: Mehdi Amini <mehdi.amini@apple.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242414 91177308-0d34-0410-b5e6-96231b3b80d8
2015-07-16 16:34:23 +00:00
Michael Kuperstein
4fceffb0d6 Revert "Make ExecutionEngine owning a DataLayout"
Reverting to fix buildbot breakage.

This reverts commit r242387.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242394 91177308-0d34-0410-b5e6-96231b3b80d8
2015-07-16 12:20:31 +00:00
Mehdi Amini
eaeb380a9f Make ExecutionEngine owning a DataLayout
Summary:
This change is part of a series of commits dedicated to have a single
DataLayout during compilation by using always the one owned by the
module.

The ExecutionEngine will act as an exception and will be unsafe to
be reused across context. We don't enforce this rule but undefined
behavior can occurs if the user tries to do it.

Reviewers: lhames

Subscribers: echristo, llvm-commits, rafael, yaron.keren

Differential Revision: http://reviews.llvm.org/D11110

From: Mehdi Amini <mehdi.amini@apple.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242387 91177308-0d34-0410-b5e6-96231b3b80d8
2015-07-16 06:17:14 +00:00
Benjamin Kramer
4bb355e885 [ExecutionEngine] ArrayRefize argument passing.
No functionality change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239687 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-13 19:50:29 +00:00
Benjamin Kramer
9589ff8949 Replace push_back(Constructor(foo)) with emplace_back(foo) for non-trivial types
If the type isn't trivially moveable emplace can skip a potentially
expensive move. It also saves a couple of characters.


Call sites were found with the ASTMatcher + some semi-automated cleanup.

memberCallExpr(
    argumentCountIs(1), callee(methodDecl(hasName("push_back"))),
    on(hasType(recordDecl(has(namedDecl(hasName("emplace_back")))))),
    hasArgument(0, bindTemporaryExpr(
                       hasType(recordDecl(hasNonTrivialDestructor())),
                       has(constructExpr()))),
    unless(isInTemplateInstantiation()))

No functional change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238602 91177308-0d34-0410-b5e6-96231b3b80d8
2015-05-29 19:43:39 +00:00
Benjamin Kramer
0973b7ddb8 Reduce dyn_cast<> to isa<> or cast<> where possible.
No functional change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234586 91177308-0d34-0410-b5e6-96231b3b80d8
2015-04-10 11:24:51 +00:00
Benjamin Kramer
1bfcd1f675 Re-sort includes with sort-includes.py and insert raw_ostream.h where it's used.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232998 91177308-0d34-0410-b5e6-96231b3b80d8
2015-03-23 19:32:43 +00:00
David Blaikie
7610ba7d24 Fix uses of reserved identifiers starting with an underscore followed by an uppercase letter
This covers essentially all of llvm's headers and libs. One or two weird
cases I wasn't sure were worth/appropriate to fix.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232394 91177308-0d34-0410-b5e6-96231b3b80d8
2015-03-16 18:06:57 +00:00
Craig Topper
c34a25d59d [C++] Use 'nullptr'.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207394 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-28 04:05:08 +00:00
Craig Topper
e703fcb975 [C++] Use 'nullptr'.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207083 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-24 06:44:33 +00:00
Chandler Carruth
0d338a59bd [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE
definition below all the header #include lines. This updates most of the
miscellaneous other lib/... directories. A few left though.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206845 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-22 03:04:17 +00:00
Chandler Carruth
bd7cba0d81 [Modules] Move GetElementPtrTypeIterator into the IR library. As its
name might indicate, it is an iterator over the types in an instruction
in the IR.... You see where this is going.

Another step of modularizing the support library.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202815 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-04 10:40:04 +00:00
Alp Toker
ae43cab6ba Fix known typos
Sweep the codebase for common typos. Includes some changes to visible function
names that were misspelt.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200018 91177308-0d34-0410-b5e6-96231b3b80d8
2014-01-24 17:20:08 +00:00
Elena Demikhovsky
3c5ce29cad LLVM Interpreter: implementation of "insertvalue" and "extractvalue";
undef constatnt for structure and test for these functions.

done by Yuri Veselov (mailto:Yuri.Veselov@intel.com)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190599 91177308-0d34-0410-b5e6-96231b3b80d8
2013-09-12 10:48:23 +00:00
Bob Wilson
db3a9e64f8 Revert patches to add case-range support for PR1255.
The work on this project was left in an unfinished and inconsistent state.
Hopefully someone will eventually get a chance to implement this feature, but
in the meantime, it is better to put things back the way the were.  I have
left support in the bitcode reader to handle the case-range bitcode format,
so that we do not lose bitcode compatibility with the llvm 3.3 release.

This reverts the following commits: 155464, 156374, 156377, 156613, 156704,
156757, 156804 156808, 156985, 157046, 157112, 157183, 157315, 157384, 157575,
157576, 157586, 157612, 157810, 157814, 157815, 157880, 157881, 157882, 157884,
157887, 157901, 158979, 157987, 157989, 158986, 158997, 159076, 159101, 159100,
159200, 159201, 159207, 159527, 159532, 159540, 159583, 159618, 159658, 159659,
159660, 159661, 159703, 159704, 160076, 167356, 172025, 186736

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190328 91177308-0d34-0410-b5e6-96231b3b80d8
2013-09-09 19:14:35 +00:00
Elena Demikhovsky
4ca0ce2594 llvm interpreter: select, shuffle and insertelement instructions.
This patch implements vector support for  select instruction and adds specific vector instructions : shuffle and insertelement. (tests are also included)
and functions lle_X_memset, lle_X_memcpy added.

Done by Veselov, Yuri (mailto:Yuri.Veselov@intel.com)



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189735 91177308-0d34-0410-b5e6-96231b3b80d8
2013-09-02 06:40:09 +00:00
Elena Demikhovsky
cf21d155ed LLVM Interpreter: This patch implements vector support for cast operations (zext, sext, uitofp, sitofp, trunc, fpext, fptosi, fptrunc, bitcast) and shift operations (shl, ashr, lshr) for integer and floating point data types.
Added tests.

Done by Yuri Veselov (mailto:Yuri.Veselov@intel.com).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187724 91177308-0d34-0410-b5e6-96231b3b80d8
2013-08-05 12:17:06 +00:00
Nadav Rotem
0d840bb2fa Teach the interpreter to handle vector compares and additional vector arithmetic operations.
Patch by Yuri Veselov.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180626 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-26 20:19:41 +00:00
Nadav Rotem
0fda0f3976 Revert r179409 because it caused some warnings and some of the build bots fail.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179418 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-12 22:02:26 +00:00
Nadav Rotem
affe889d08 Add support for additional vector instructions in the interpreter.
patch by Veselov, Yuri <Yuri.Veselov@intel.com>.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179409 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-12 20:45:20 +00:00
Nadav Rotem
953783e00c Add support for vector data types in the LLVM interpreter.
Patch by:
Veselov, Yuri <Yuri.Veselov@intel.com>



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178469 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-01 15:53:30 +00:00
Jim Grosbach
9f285c6c31 Fix misplaced 'break'.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174205 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-01 18:57:06 +00:00
Jim Grosbach
cce07c9b31 interpreter: Fix errant fallthrough.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174080 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-31 19:46:59 +00:00
Chandler Carruth
0b8c9a80f2 Move all of the header files which are involved in modelling the LLVM IR
into their new header subdirectory: include/llvm/IR. This matches the
directory structure of lib, and begins to correct a long standing point
of file layout clutter in LLVM.

There are still more header files to move here, but I wanted to handle
them in separate commits to make tracking what files make sense at each
layer easier.

The only really questionable files here are the target intrinsic
tablegen files. But that's a battle I'd rather not fight today.

I've updated both CMake and Makefile build systems (I think, and my
tests think, but I may have missed something).

I've also re-sorted the includes throughout the project. I'll be
committing updates to Clang, DragonEgg, and Polly momentarily.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171366 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-02 11:36:10 +00:00
Chandler Carruth
d04a8d4b33 Use the new script to sort the includes of every file under lib.
Sooooo many of these had incorrect or strange main module includes.
I have manually inspected all of these, and fixed the main module
include to be the nearest plausible thing I could find. If you own or
care about any of these source files, I encourage you to take some time
and check that these edits were sensible. I can't have broken anything
(I strictly added headers, and reordered them, never removed), but they
may not be the headers you'd really like to identify as containing the
API being implemented.

Many forward declarations and missing includes were added to a header
files to allow them to parse cleanly when included first. The main
module rule does in fact have its merits. =]

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169131 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-03 16:50:05 +00:00
Chandler Carruth
426c2bf5cd Revert the majority of the next patch in the address space series:
r165941: Resubmit the changes to llvm core to update the functions to
         support different pointer sizes on a per address space basis.

Despite this commit log, this change primarily changed stuff outside of
VMCore, and those changes do not carry any tests for correctness (or
even plausibility), and we have consistently found questionable or flat
out incorrect cases in these changes. Most of them are probably correct,
but we need to devise a system that makes it more clear when we have
handled the address space concerns correctly, and ideally each pass that
gets updated would receive an accompanying test case that exercises that
pass specificaly w.r.t. alternate address spaces.

However, from this commit, I have retained the new C API entry points.
Those were an orthogonal change that probably should have been split
apart, but they seem entirely good.

In several places the changes were very obvious cleanups with no actual
multiple address space code added; these I have not reverted when
I spotted them.

In a few other places there were merge conflicts due to a cleaner
solution being implemented later, often not using address spaces at all.
In those cases, I've preserved the new code which isn't address space
dependent.

This is part of my ongoing effort to clean out the partial address space
code which carries high risk and low test coverage, and not likely to be
finished before the 3.2 release looms closer. Duncan and I would both
like to see the above issues addressed before we return to these
changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167222 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-01 09:14:31 +00:00
Micah Villmow
2c39b15073 Resubmit the changes to llvm core to update the functions to support different pointer sizes on a per address space basis.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165941 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-15 16:24:29 +00:00
Micah Villmow
fb384d61c7 Revert 165732 for further review.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165747 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-11 21:27:41 +00:00
Micah Villmow
f3840d2c16 Add in the first iteration of support for llvm/clang/lldb to allow variable per address space pointer sizes to be optimized correctly.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165726 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-11 17:21:41 +00:00
Stepan Dyatkovskiy
47cbc4e0ee Optimized usage of new SwitchInst case values (IntegersSubset type) in Local.cpp, Execution.cpp and BitcodeWriter.cpp.
I got about 1% of compile-time improvement on my machines (Ubuntu 11.10 i386 and Ubuntu 12.04 x64).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159076 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-23 10:58:58 +00:00
Stepan Dyatkovskiy
43eb31bfae PR1255: case ranges.
IntRange converted from struct to class. So main change everywhere is replacement of ".Low/High" with ".getLow/getHigh()"



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157884 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-02 09:42:43 +00:00
Stepan Dyatkovskiy
f8d14c4ca3 PR1255: case ranges.
IntItem cleanup. IntItemBase, IntItemConstantIntImp and IntItem merged into IntItem. All arithmetic operators was propogated from APInt. Also added comparison operators <,>,<=,>=. Currently you will find set of macros that propogates operators from APInt to IntItem in the beginning of IntegerSubset. Note that THESE MACROS WILL REMOVED after all passes will case-ranges compatible. Also note that these macros much smaller pain that something like this:
if (V->getValue().ugt(AnotherV->getValue()) { ... }

These changes made IntItem full featured integer object. It allows to make IntegerSubset class generic (move out all ConstantInt references inside and add unit-tests) in next commits.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157810 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-01 10:06:14 +00:00
Stepan Dyatkovskiy
0aa32d5d0f ConstantRangesSet renamed to IntegersSubset. CRSBuilder renamed to IntegersSubsetMapping.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157612 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-29 12:26:47 +00:00
Stepan Dyatkovskiy
484fc93eff PR1255: Case Ranges
Implemented IntItem - the wrapper around APInt. Why not to use APInt item directly right now?
1. It will very difficult to implement case ranges as series of small patches. We got several large and heavy patches. Each patch will about 90-120 kb. If you replace ConstantInt with APInt in SwitchInst you will need to changes at the same time all Readers,Writers and absolutely all passes that uses SwitchInst.
2. We can implement APInt pool inside and save memory space. E.g. we use several switches that works with 256 bit items (switch on signatures, or strings). We can avoid value duplicates in this case.
3. IntItem can be easyly easily replaced with APInt.
4. Currenly we can interpret IntItem both as ConstantInt and as APInt. It allows to provide SwitchInst methods that works with ConstantInt for non-updated passes.

Why I need it right now? Currently I need to update SimplifyCFG pass (EqualityComparisons). I need to work with APInts directly a lot, so peaces of code
ConstantInt *V = ...;
if (V->getValue().ugt(AnotherV->getValue()) {
  ...
}
will look awful. Much more better this way:
IntItem V = ConstantIntVal->getValue();
if (AnotherV < V) {
}

Of course any reviews are welcome.

P.S.: I'm also going to rename ConstantRangesSet to IntegersSubset, and CRSBuilder to IntegersSubsetMapping (allows to map individual subsets of integers to the BasicBlocks).
Since in future these classes will founded on APInt, it will possible to use them in more generic ways.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157576 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-28 12:39:09 +00:00
Stepan Dyatkovskiy
1c8f4b8c34 PR1255 (case ranges: work with ConstantRangesSet instead of ConstantInt) related changes for Execution and Verifier.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157183 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-21 10:44:40 +00:00
Stepan Dyatkovskiy
3d3abe0852 llvm::SwitchInst
Renamed methods caseBegin, caseEnd and caseDefault with case_begin, case_end, and case_default.
Added some notes relative to case iterators.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152532 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-11 06:09:17 +00:00
Stepan Dyatkovskiy
c10fa6c801 Taken into account Duncan's comments for r149481 dated by 2nd Feb 2012:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20120130/136146.html

Implemented CaseIterator and it solves almost all described issues: we don't need to mix operand/case/successor indexing anymore. Base iterator class is implemented as a template since it may be initialized either from "const SwitchInst*" or from "SwitchInst*".

ConstCaseIt is just a read-only iterator.
CaseIt is read-write iterator; it allows to change case successor and case value.

Usage of iterator allows totally remove resolveXXXX methods. All indexing convertions done automatically inside the iterator's getters.

Main way of iterator usage looks like this:
SwitchInst *SI = ... // intialize it somehow

for (SwitchInst::CaseIt i = SI->caseBegin(), e = SI->caseEnd(); i != e; ++i) {
  BasicBlock *BB = i.getCaseSuccessor();
  ConstantInt *V = i.getCaseValue();
  // Do something.
}

If you want to convert case number to TerminatorInst successor index, just use getSuccessorIndex iterator's method.
If you want initialize iterator from TerminatorInst successor index, use CaseIt::fromSuccessorIndex(...) method.

There are also related changes in llvm-clients: klee and clang.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152297 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-08 07:06:20 +00:00