In openFileForRead, we would not previously return an error
if real_path resolution failed. After a recent patch, we
started propagating this error up. This caused a failure
in clang when trying to call openFileForRead("nul"). This
patch restores the previous behavior of not propagating this
error up.
llvm-svn: 297488
SelectionDAG::ComputeNumSignBits is poor at build_vector handling, meaning that we can't see that all the vXi64 sources are in fact sign extended i32 or smaller.
llvm-svn: 297486
Removes immediate range checks for these instructions, since they have GPR
rt as their input operand.
Patch by Stefan Maksimovic.
Differential Revision: https://reviews.llvm.org/D30693
llvm-svn: 297485
LLVM already has real_path like functionality, but it is
cumbersome to use and involves clean up after (e.g. you have
to call openFileForRead, then close the resulting FD).
Furthermore, on Windows it doesn't work for directories since
opening a directory and opening a file require slightly
different flags.
So I add a simple function `real_path` which works for all
paths on all platforms and has a simple to use interface.
In doing so, I add the ability to opt in to resolving tilde
expressions (e.g. ~/foo), which are normally handled by
the shell.
Differential Revision: https://reviews.llvm.org/D30668
llvm-svn: 297483
Summary:
Depends on D30379
This improves the state of things for the sub class of operation.
Reviewers: jyknight, nemanjai, mkuper, spatel, RKSimon, zvi, bkramer
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D30436
llvm-svn: 297482
If we are transferring MMX registers to XMM for conversion we could use the MMX equivalents (CVTPI2PD + CVTPI2PS) without affecting rounding/exceptions etc.
llvm-svn: 297481
This change fixes an assertion failure the in case KMP_AFFINITY is set with
'proclist' specified but without 'explicit'
e.g., KMP_AFFINITY=verbose,proclist=[0-31]
Patch by Olga Malysheva
Differential Revision: https://reviews.llvm.org/D30404
llvm-svn: 297480
Summary: As per title. This is extracted from D29872 and I threw SADDO in.
Reviewers: jyknight, nemanjai, mkuper, spatel, RKSimon, zvi, bkramer
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D30379
llvm-svn: 297479
Instead of declaring a function as:
inline val plain_get_val_if_fixed(enum dim type, unsigned int pos) const;
we use:
inline isl::val plain_get_val_if_fixed(isl::dim type, unsigned int pos) const;
The first argument caused the following compile time error on windows:
"error C3431: 'dim': a scoped enumeration cannot be redeclared as an
unscoped enumeration"
In some cases it is sufficient to just drop the 'enum' prefix, but for example
for isl::set the 'enum class dim' type collides with the function name
isl::set::dim and can consequently not be referenced. To avoid such kind of
ambiguities in the future we add the isl:: prefix consistently to all types
used.
Reported-by: Michael Kruse <llvm@meinersbur.de>
llvm-svn: 297478
If we are transferring XMM conversion results to MMX registers we could use the MMX equivalents (CVTPD2PI/CVTTPD2PI + CVTPS2PI/CVTTPS2PI) with affecting rounding/expections etc.
llvm-svn: 297476
This new pass removes unnecessary accesses and writes. It currently
supports 2 simplifications, but more are planned.
It removes write accesses that write a loaded value back to the location
it was loaded from. It is a typical artifact from DeLICM. Removing it
will get rid of bogus dependencies later in dependency analysis.
It also removes statements without side-effects. ScopInfo already
removes these, but the removal of unnecessary writes can result in
more side-effect free statements.
Differential Revision: https://reviews.llvm.org/D30820
llvm-svn: 297473
1. Reimplemented conditional operator so that it checks
compatibility of unqualified pointees of the 2nd and
the 3rd operands (C99, OpenCL v2.0 6.5.15).
Define QualTypes compatibility for OpenCL as following:
- corresponding types are compatible (C99 6.7.3)
- CVR-qualifiers are equal (C99 6.7.3)
- address spaces are equal (implementation defined)
2. Added generic address space to Itanium mangling.
Review: D30037
Patch by Dmitry Borisenkov!
llvm-svn: 297468
This pass is a small and self-contained example of a piece of code that was
written with the isl C interface. The diff of this change nicely shows how the
C++ bindings can improve the readability of the code by avoiding the long C
function names and by avoiding any need for memory management.
As you will see, no calls to isl_*_copy or isl_*_free are needed anymore.
Instead the C++ interface takes care of automatically managing the objects.
This may introduce internally additional copies, but due to the isl reference
counting, such copies are expected to be cheap. For performance critical
operations, we will later exploit move semantics to eliminate unnecessary
copies that have shown to be costly.
Below we give a set of examples that shows the benefit of the C++ interface vs.
the pure C interface.
Check properties
----------------
Before:
if (isl_aff_is_zero(aff) || isl_aff_is_one(aff))
return true;
After:
if (Aff.is_zero() || Aff.is_one())
return true;
Type conversion
---------------
Before:
isl_union_pw_multi_aff *UPMA = isl_union_pw_multi_aff_from_union_map(umap);
After:
isl::union_pw_multi_aff UPMA = UMap;
Type construction
-----------------
Before:
auto *Empty = isl_union_map_empty(space);
After:
auto Empty = isl::union_map::empty(Space);
Operations
----------
Before:
set = isl_union_set_intersect(set, set2);
After:
Set = Set.intersect(Set2);
The use of isl::boolean in return types also adds an increases the robustness
of Polly, as on conversion to true or false, we verify that no isl_bool_error
has been returned and assert in case an error was returned. Before this change
we would have just ignored the error and proceeded with (some) exection path.
Tags: #polly
Reviewed By: Meinersbur
Differential Revision: https://reviews.llvm.org/D30619
llvm-svn: 297466
Printing typedefs or type aliases using clang_getTypeSpelling() is missing the
namespace they are defined in. This is in contrast to other types that always
yield the full typename including namespaces.
Patch by Michael Reiher!
Differential Revision: https://reviews.llvm.org/D29944
llvm-svn: 297465
For this translation we introduce two functions, valFromAPInt and APIntFromVal,
to convert between isl::val and APInt. For now these are just proxies, but in
the future they will replace the current isl_val* based conversion functions.
The isl unit test cases benefit most from the new isl::boolean (from Michael
Kruse), which can be explicitly casted to bool and which -- as part of this cast
-- emits a check that no error condition has been triggered so far. This allows
us to simplify
EXPECT_EQ(isl_bool_true, isl_val_is_zero(IslZero));
to
EXPECT_TRUE(IslZero.is_zero());
This simplification also becomes very clear in operator==, which changes from
auto IsEqual = isl_set_is_equal(LHS.keep(), RHS.keep());
EXPECT_NE(isl_bool_error, IsEqual);
return IsEqual;
to just
return bool(LHS.is_equal(RHS));
Some background for non-isl users. The isl C interface has an isl_bool type,
which can be either true, false, or error. Hence, whenever a function returns
a value of type isl_bool, an explicit error check should be considered. By
using isl::boolean, we can just cast the isl::boolean to 'bool' or simply use
the isl::boolean in a context where it will automatically be casted to bool
(e.g., in an if-condition). When doing so, the C++ bindings automatically add
code that verifies that the return value is not an error code. If it is, the
program will warn about this and abort. For cases where errors are expected,
isl::boolean provides checks such as boolean::is_true_or_error() or
boolean::is_true_no_error() to explicitly control program behavior in case of
error conditions.
Thanks to the new automatic memory management, we also can avoid many calls to
isl_*_free. For code that had previously been managed by IslPtr<>, many calls
to give/take/copy are eliminated.
Tags: #polly
Reviewed By: Meinersbur
Differential Revision: https://reviews.llvm.org/D30618
llvm-svn: 297464
Translate the full algorithm to use the new isl C++ bindings
This is a large piece of code that has been written with the Polly IslPtr<>
memory management tool, which only performed memory management, but did not
provide a method interface. As such the code was littered with calls to
give(), copy(), keep(), and take(). The diff of this change should give a
good example how the new method interface simplifies the code by removing the
need for switching between managed types and C functions all the time
and consequently also the need to use the long C function names.
These are a couple of examples comparing the old IslPtr memory management
interface with the complete method interface.
Check properties
----------------
Before:
if (isl_aff_is_zero(Aff.get()) || isl_aff_is_one(Aff.get()))
return true;
After:
if (Aff.is_zero() || Aff.is_one())
return true;
Type conversion
---------------
Before:
isl_union_pw_multi_aff *UPMA =
give(isl_union_pw_multi_aff_from_union_map(UMap.copy());
After:
isl::union_pw_multi_aff UPMA = UMap;
Type construction
-----------------
Before:
auto Empty = give(isl_union_map_empty(Space.copy());
After:
auto Empty = isl::union_map::empty(Space);
Operations
----------
Before:
Set = give(isl_union_set_intersect(Set.copy(), Set2.copy());
After:
Set = Set.intersect(Set2);
Tags: #polly
Reviewed By: Meinersbur
Differential Revision: https://reviews.llvm.org/D30617
llvm-svn: 297463
The isl C++ binding method interface introduces a thin C++ layer that allows
to call isl methods directly on the memory managed C++ objects. This makes the
relevant methods directly available via code-completion interfaces, allows for
the use of overloading, conversion constructors, and many other nice C++
features that make using isl a lot easier.
The individual features will be highlighted in the subsequent commits.
Tags: #polly
Reviewed By: Meinersbur
Differential Revision: https://reviews.llvm.org/D30616
llvm-svn: 297462
We currently have to insert bits via a temporary variable of the same size as the target with various shift/mask stages, resulting in further temporary variables, all of which require the allocation of memory for large APInts (MaskSizeInBits > 64).
This is another of the compile time issues identified in PR32037 (see also D30265).
This patch adds the APInt::insertBits() helper method which avoids the temporary memory allocation and masks/inserts the raw bits directly into the target.
Differential Revision: https://reviews.llvm.org/D30780
llvm-svn: 297458
This patches teaches the MIPS backend to accept more values for constant
splats. Previously, only 10 bit signed immediates or values that could be
loaded using an ldi.[bhwd] instruction would be acceptted. This patch relaxes
that constraint so that any constant value that be splatted is accepted.
As a result, the constant pool is used less for vector operations, and the
suite of bit manipulation instructions b(clr|set|neg)i can now be used with
the full range of their immediate operand.
Reviewers: slthakur
Differential Revision: https://reviews.llvm.org/D30640
llvm-svn: 297457
Summary:
This is a continuation of D28861. Add an SMLoc to MCUnaryExpr such that
a better diagnostic can be given in case of an error in later stages of
assembling.
Reviewers: rengolin, grosbach, javed.absar, olista01
Reviewed By: olista01
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D30581
llvm-svn: 297454
ARMISD::ADD[CE] nodes, instead of the generic ISD::ADD[CE].
Summary:
This allows for some simplification because the combines
are no longer limited to just one go at the node before
it gets legalized into an ARM target-specific one.
Reviewers: jmolloy, rogfer01
Subscribers: aemerson, llvm-commits, rengolin
Differential Revision: https://reviews.llvm.org/D30401
llvm-svn: 297453
Over the last couple of months several authors of independent isl C++ bindings
worked together to jointly design an official set of isl C++ bindings which
combines their experience in developing isl C++ bindings. The new bindings have
been designed around a value pointer style interface and remove the need for
explicit pointer managenent and instead use C++ language features to manage isl
objects.
This commit introduces the smart-pointer part of the isl C++ bindings and
replaces the current IslPtr<T> classes, which served the very same purpose, but
had to be manually maintained. Instead, we now rely on automatically generated
classes for each isl object, which provide value_ptr semantics.
An isl object has the following smart pointer interface:
inline set manage(__isl_take isl_set *ptr);
class set {
friend inline set manage(__isl_take isl_set *ptr);
isl_set *ptr = nullptr;
inline explicit set(__isl_take isl_set *ptr);
public:
inline set();
inline set(const set &obj);
inline set &operator=(set obj);
inline ~set();
inline __isl_give isl_set *copy() const &;
inline __isl_give isl_set *copy() && = delete;
inline __isl_keep isl_set *get() const;
inline __isl_give isl_set *release();
inline bool is_null() const;
}
The interface and behavior of the new value pointer style classes is inspired
by http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3339.pdf, which
proposes a std::value_ptr, a smart pointer that applies value semantics to its
pointee.
We currently only provide a limited set of public constructors and instead
require provide a global overloaded type constructor method "isl::obj
isl::manage(isl_obj *)", which allows to convert an isl_set* to an isl::set by
calling 'S = isl::manage(s)'. This pattern models the make_unique() constructor
for unique pointers.
The next two functions isl::obj::get() and isl::obj::release() are taken
directly from the std::value_ptr proposal:
S.get() extracts the raw pointer of the object managed by S.
S.release() extracts the raw pointer of the object managed by S and sets the
object in S to null.
We additionally add std::obj::copy(). S.copy() returns a raw pointer refering
to a copy of S, which is a shortcut for "isl::obj(oldobj).release()", a
functionality commonly needed when interacting directly with the isl C
interface where all methods marked with __isl_take require consumable raw
pointers.
S.is_null() checks if S manages a pointer or if the managed object is currently
null. We add this function to provide a more explicit way to check if the
pointer is empty compared to a direct conversion to bool.
This commit also introduces a couple of polly-specific extensions that cover
features currently not handled by the official isl C++ bindings draft, but
which have been provided by IslPtr<T> and are consequently added to avoid code
churn. These extensions include:
- operator bool() : Conversion from objects to bool
- construction from nullptr_t
- get_ctx() method
- take/keep/give methods, which match the currently used naming
convention of IslPtr<T> in Polly. They just forward to
(release/get/manage).
- raw_ostream printers
We expect that these extensions are over time either removed or upstreamed to
the official isl bindings.
We also export a couple of classes that have not yet been exported in isl (e.g.,
isl::space)
As part of the code review, the following two questions were asked:
- Why do we not use a standard smart pointer?
std::value_ptr was a proposal that has not been accepted. It is consequently
not available in the standard library. Even if it would be available, we want
to expand this interface with a complete method interface that is conveniently
available from each managed pointer. The most direct way to achieve this is to
generate a specialiced value style pointer class for each isl object type and
add any additional methods to this class. The relevant changes follow in
subsequent commits.
- Why do we not use templates or macros to avoid code duplication?
It is certainly possible to use templates or macros, but as this code is
auto-generated there is no need to make writing this code more efficient. Also,
most of these classes will be specialized with individual member functions in
subsequent commits, such that there will be little code reuse to exploit. Hence,
we decided to do so at the moment.
These bindings are not yet officially part of isl, but the draft is already very
stable. The smart pointer interface itself did not change since serveral months.
Adding this code to Polly is against our normal policy of only importing
official isl code. In this case however, we make an exception to showcase a
non-trivial use case of these bindings which should increase confidence in these
bindings and will help upstreaming them to isl.
Tags: #polly
Reviewed By: Meinersbur
Differential Revision: https://reviews.llvm.org/D30325
llvm-svn: 297452
It was introduced in:
r296945
WholeProgramDevirt: Implement exporting for single-impl devirtualization.
---------------------
r296939
WholeProgramDevirt: Add any unsuccessful llvm.type.checked.load devirtualizations to the list of llvm.type.test users.
---------------------
Microsoft Visual Studio Community 2015
Version 14.0.23107.0 D14REL
Does not compile that code without additional brackets, showing multiple error like below:
WholeProgramDevirt.cpp(1216): error C2958: the left bracket '[' found at 'c:\access_softek\llvm\lib\transforms\ipo\wholeprogramdevirt.cpp(1216)' was not matched correctly
WholeProgramDevirt.cpp(1216): error C2143: syntax error: missing ']' before '}'
WholeProgramDevirt.cpp(1216): error C2143: syntax error: missing ';' before '}'
WholeProgramDevirt.cpp(1216): error C2059: syntax error: ']'
llvm-svn: 297451
All MIPS .debug_* sections should be marked with ELF type SHT_MIPS_DWARF
accordingly the specification [1]. Also the same section type is assigned
to these sections by GNU tools.
[1] ftp.software.ibm.com/software/os390/czos/dwarf/mips_extensions.pdf
Differential Revision: https://reviews.llvm.org/D29789
llvm-svn: 297447
GAS supports specification of section header's type using a numeric
value [1]. This patch brings the same functionality to LLVM. That allows
to setup some target-specific section types belong to the SHT_LOPROC -
SHT_HIPROC range. If we attempt to print unknown section type, MCSectionELF
class shows an error message. It's better than print sole '@' sign
without any section type name.
In case of MIPS, example of such section's type is SHT_MIPS_DWARF.
Without the patch we will have to implement some workarounds
in probably not-MIPS-specific part of code base to convert SHT_MIPS_DWARF
to the @progbits while printing assembly and to assign SHT_MIPS_DWARF for
@progbits sections named .debug_* if we encounter such section in
an input assembly.
[1] https://sourceware.org/binutils/docs/as/Section.html
Differential Revision: https://reviews.llvm.org/D29719
llvm-svn: 297446
same as already done for ARM and Thumb2.
Reviewers: jmolloy, rogfer01, efriedma
Subscribers: aemerson, llvm-commits, rengolin
Differential Revision: https://reviews.llvm.org/D30400
llvm-svn: 297443
HasContent. If we have a valid accelerator table which has no
content, we want to depend on that (empty) table as the authoritative
source instead of reading through all the debug info for lookups.
<rdar://problem/30867462>
llvm-svn: 297441
SectionLoadList exposed by this test. Greg tried to chase it down
& got pretty far but the isn't correct so we'll disable this test
for now until I can figure that out.
<rdar://problem/30899227>
llvm-svn: 297440
Summary:
These are the functions used to determine when values of loads can be
extracted from stores, etc, and to perform the necessary insertions to
do this. There are no changes to the functions themselves except
reformatting, and one case where memdep was informed of a removed load
(which was pushed into the caller).
Reviewers: davide
Subscribers: mgorny, llvm-commits, Prazek
Differential Revision: https://reviews.llvm.org/D30478
llvm-svn: 297438
Summary: We should not use that to check basic block hotness as optimization may mess it up.
Reviewers: eraman
Reviewed By: eraman
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D30800
llvm-svn: 297437
Zachary Turner