Commit Graph

5304 Commits

Author SHA1 Message Date
Tim Northover
6eaf840a3d Docs: remove extra {} around result types.
It makes the types look like they're single-element structures. And
when we have instructions that *do* result in a struct, that can get
confusing rather quickly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210905 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-13 14:24:23 +00:00
Tim Northover
ab47c159b0 Docs: fix grammar error in description
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210904 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-13 14:24:16 +00:00
Tim Northover
8f2a85e099 IR: add "cmpxchg weak" variant to support permitted failure.
This commit adds a weak variant of the cmpxchg operation, as described
in C++11. A cmpxchg instruction with this modifier is permitted to
fail to store, even if the comparison indicated it should.

As a result, cmpxchg instructions must return a flag indicating
success in addition to their original iN value loaded. Thus, for
uniformity *all* cmpxchg instructions now return "{ iN, i1 }". The
second flag is 1 when the store succeeded.

At the DAG level, a new ATOMIC_CMP_SWAP_WITH_SUCCESS node has been
added as the natural representation for the new cmpxchg instructions.
It is a strong cmpxchg.

By default this gets Expanded to the existing ATOMIC_CMP_SWAP during
Legalization, so existing backends should see no change in behaviour.
If they wish to deal with the enhanced node instead, they can call
setOperationAction on it. Beware: as a node with 2 results, it cannot
be selected from TableGen.

Currently, no use is made of the extra information provided in this
patch. Test updates are almost entirely adapting the input IR to the
new scheme.

Summary for out of tree users:
------------------------------

+ Legacy Bitcode files are upgraded during read.
+ Legacy assembly IR files will be invalid.
+ Front-ends must adapt to different type for "cmpxchg".
+ Backends should be unaffected by default.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210903 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-13 14:24:07 +00:00
Bob Wilson
4cea00282f LangRef: clarify that global declarations can have section and alignment info.
I'm not sure what it means to set a section for a declaration in another
translation unit, but there are some tests in the tree that do it so it seems
to be legal now regardless.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210819 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-12 20:40:33 +00:00
Bob Wilson
7c3436d941 Add missing "InitializerConstant" to global variable syntax in LangRef.
The syntax for Global Variables in LangRef is missing the initializer.
This syntax section was added in r199218 along with changes to the
dllexport/dllimport handling, and I guess it was just an oversight to omit the
initializer values. I’ve marked the initializer as optional because this syntax
is used for both declarations and definitions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210808 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-12 18:42:55 +00:00
Alp Toker
8aeca44558 Reduce verbiage of lit.local.cfg files
We can just split targets_to_build in one place and make it immutable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210496 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-09 22:42:55 +00:00
Rafael Espindola
ed7d283ce5 Update langref for unnamed_addr being allowed in aliases.
Thanks to Duncan P. N. Exon Smith and Owen Anderson for noticing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210490 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-09 21:21:33 +00:00
Saleem Abdulrasool
c90ddb1869 ARM: add VLA extension for WoA Itanium ABI
The armv7-windows-itanium environment is nearly identical to the MSVC ABI. It
has a few divergences, mostly revolving around the use of the Itanium ABI for
C++. VLA support is one of the extensions that are amongst the set of the
extensions.

This adds support for proper VLA emission for this environment. This is
somewhat similar to the handling for __chkstk emission on X86 and the large
stack frame emission for ARM. The invocation style for chkstk is still
controlled via the -mcmodel flag to clang.

Make an explicit note that this is an extension.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210489 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-09 20:18:42 +00:00
Jeroen Ketema
503447efba [docs] Fix typo, align comments, fix syntax highlighting
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210462 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-09 10:12:29 +00:00
Rafael Espindola
013321a0f9 Fix a few issues with comdat handling on COFF.
* Section association cannot use just the section name as many
sections can have the same name. With this patch, the comdat symbol in
an assoc section is interpreted to mean a symbol in the associated
section and the mapping is discovered from it.

* Comdat symbols were not being set correctly. Instead we were getting
whatever was output first for that section.

A consequence is that associative sections now must use .section to
set the association. Using .linkonce would not work since it is not
possible to change a sections comdat symbol (it is used to decide if
we should create a new section or reuse an existing one).

This includes r210298, which was reverted because it was asserting
on an associated section having the same comdat as the associated
section.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210367 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 19:26:12 +00:00
Dan Liew
8cfe2c00b0 Fix a typo made in Programmer's Manual made in r210354. Spotted
by Paul Robinson.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210363 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 18:44:21 +00:00
Dan Liew
64d39d3281 Mention the IRBuilder in Programmer's Manual with a few small examples.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210354 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 17:25:47 +00:00
Pekka Jaaskelainen
53b344dcca Slight language tweak from Jonathan Humphreys.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210327 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 11:21:44 +00:00
Rafael Espindola
6fd1b8ee48 Allow aliases to be unnamed_addr.
Alias with unnamed_addr were in a strange state. It is stored in GlobalValue,
the language reference talks about "unnamed_addr aliases" but the verifier
was rejecting them.

It seems natural to allow unnamed_addr in aliases:

* It is a property of how it is accessed, not of the data itself.
* It is perfectly possible to write code that depends on the address
of an alias.

This patch then makes unname_addr legal for aliases. One side effect is that
the syntax changes for a corner case: In globals, unnamed_addr is now printed
before the address space.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210302 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 01:20:28 +00:00
Alexey Samsonov
bbd34136f3 Fix markup for -debug-only option
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210300 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-05 23:12:43 +00:00
Tom Roeder
5d0f7af3dc Add a new attribute called 'jumptable' that creates jump-instruction tables for functions marked with this attribute.
It includes a pass that rewrites all indirect calls to jumptable functions to pass through these tables.

This also adds backend support for generating the jump-instruction tables on ARM and X86.
Note that since the jumptable attribute creates a second function pointer for a
function, any function marked with jumptable must also be marked with unnamed_addr.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210280 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-05 19:29:43 +00:00
Yaron Keren
4db3ad47fc Document how to select build configuration with Visual C++ IDE or command line.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210273 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-05 16:42:26 +00:00
Justin Bogner
e5d8481310 docs: Remove documentation for legacy PGO options
Late last year r191835 removed a largely unmaintained legacy PGO
infrastructure, but some of the docs were missed. Since these docs are
for things that don't actually exist anymore, they should be removed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210165 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-04 06:29:38 +00:00
Rafael Espindola
2d21b25393 Allow alias to point to an arbitrary ConstantExpr.
This  patch changes GlobalAlias to point to an arbitrary ConstantExpr and it is
up to MC (or the system assembler) to decide if that expression is valid or not.

This reduces our ability to diagnose invalid uses and how early we can spot
them, but it also lets us do things like

@test5 = alias inttoptr(i32 sub (i32 ptrtoint (i32* @test2 to i32),
                                 i32 ptrtoint (i32* @bar to i32)) to i32*)

An important implication of this patch is that the notion of aliased global
doesn't exist any more. The alias has to encode the information needed to
access it in its metadata (linkage, visibility, type, etc).

Another consequence to notice is that getSection has to return a "const char *".
It could return a NullTerminatedStringRef if there was such a thing, but when
that was proposed the decision was to just uses "const char*" for that.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210062 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-03 02:41:57 +00:00
Alp Toker
04de60e28f GraphWriter: detect graph viewer programs at runtime
Replace the crufty build-time configure checks for program paths with
equivalent runtime logic.

This lets users install graphing tools as needed without having to reconfigure
and rebuild LLVM, while eliminating a long chain of inappropriate compile
dependencies that included GUI programs and the windowing system.

Additional features:

 * Support the OS X 'open' command to view graphs generated by any of the
   Graphviz utilities. This is an alternative to the Graphviz OS X UI which is
   no longer available on Mountain Lion.

 * Produce informative log output upon failure to indicate which programs can
   be installed to view graphs.

Ping me if this doesn't work for your particular environment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210001 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-02 01:40:04 +00:00
Sanjay Patel
6126c55782 fixed more typos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209921 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-30 21:18:13 +00:00
Sanjay Patel
26476d32d3 added link to CMake page
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209918 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-30 21:07:25 +00:00
Sanjay Patel
c6d0c90b30 fixed typo
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209916 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-30 20:55:55 +00:00
Jeroen Ketema
3fda4b2cd8 Sync list of targets with configure's reality
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209855 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-29 22:23:22 +00:00
Sanjay Patel
9139823866 fixed a few typos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209768 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-28 20:07:37 +00:00
Rafael Espindola
665d42accf [pr19844] Add thread local mode to aliases.
This matches gcc's behavior. It also seems natural given that aliases
contain other properties that govern how it is accessed (linkage,
visibility, dll storage).

Clang still has to be updated to expose this feature to C.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209759 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-28 18:15:43 +00:00
Reid Kleckner
54ba0dfb55 Wording fix for llvm.global_dtors docs.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209687 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-27 21:35:17 +00:00
Rafael Espindola
b84ced649e Fix link.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209640 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-26 21:30:40 +00:00
Tim Northover
29f94c7201 AArch64/ARM64: move ARM64 into AArch64's place
This commit starts with a "git mv ARM64 AArch64" and continues out
from there, renaming the C++ classes, intrinsics, and other
target-local objects for consistency.

"ARM64" test directories are also moved, and tests that began their
life in ARM64 use an arm64 triple, those from AArch64 use an aarch64
triple. Both should be equivalent though.

This finishes the AArch64 merge, and everyone should feel free to
continue committing as normal now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209577 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-24 12:50:23 +00:00
Pekka Jaaskelainen
4f22c980f4 Updated the llvm.mem.parallel_loop_access semantics to include the possibility
to have only some of the loop's memory instructions be annotated and still _help_
the loop carried dependence analysis. 

This was discussed in the llvmdev ML (topic: "parallel loop metadata question").


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209507 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-23 11:35:46 +00:00
Simon Atanasyan
84a0dc323d [YAML] Add an optional argument EnumMask to the yaml::IO::bitSetCase().
Some bit-set fields used in ELF file headers in fact contain two parts.
The first one is a regular bit-field. The second one is an enumeraion.
For example ELF header `e_flags` for MIPS target might contain the
following values:

Bit-set values:

  EF_MIPS_NOREORDER = 0x00000001
  EF_MIPS_PIC       = 0x00000002
  EF_MIPS_CPIC      = 0x00000004
  EF_MIPS_ABI2      = 0x00000020

Enumeration:

  EF_MIPS_ARCH_32   = 0x50000000
  EF_MIPS_ARCH_64   = 0x60000000
  EF_MIPS_ARCH_32R2 = 0x70000000
  EF_MIPS_ARCH_64R2 = 0x80000000

For printing bit-sets we use the `yaml::IO::bitSetCase()`. It does not
support bit-set/enumeration combinations and prints too many flags from
an enumeration part. This patch fixes this problem. New method
`yaml::IO::maskedBitSetCase()` handle "enumeration" part of bitset
defined by provided mask.

Patch reviewed by Nick Kledzik and Sean Silva.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209504 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-23 08:07:09 +00:00
Eric Christopher
ff93350aa6 Update some AliasAnalysis pass docs for getAdjustedAnalysisPointer.
Patch by George Burgess.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209467 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-22 19:38:25 +00:00
Eric Christopher
68c7a1cb98 Clean up language and grammar.
Based on a patch by jfcaron3@gmail.com!
PR19806

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209216 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-20 17:11:11 +00:00
Nick Lewycky
fe47ebfad3 Add 'nonnull', a new parameter and return attribute which indicates that the pointer is not null. Instcombine will elide comparisons between these and null. Patch by Luqman Aden!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209185 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-20 01:23:40 +00:00
Alexey Samsonov
df0d63dec4 Add documentation for llvm-dwarfdump tool
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209173 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-19 22:53:29 +00:00
Alexey Samsonov
bf6e3f9257 [DWARF parser] Teach DIContext to fetch short (non-linkage) function names for a given address.
Change --functions option in llvm-symbolizer tool to accept
values "none", "short" or "linkage". Update the tests and docs
accordingly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209050 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-17 00:07:48 +00:00
Reid Kleckner
1ce3088669 Add comdat key field to llvm.global_ctors and llvm.global_dtors
This allows us to put dynamic initializers for weak data into the same
comdat group as the data being initialized.  This is necessary for MSVC
ABI compatibility.  Once we have comdats for guard variables, we can use
the combination to help GlobalOpt fire more often for weak data with
guarded initialization on other platforms.

Reviewers: nlewycky

Differential Revision: http://reviews.llvm.org/D3499

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209015 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-16 20:39:27 +00:00
Alp Toker
727273b11c Fix typos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208839 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-15 01:52:21 +00:00
Sylvestre Ledru
df75220bc7 Update of the documentation: I think we are now happy with Phabricator
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208764 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-14 09:22:15 +00:00
Jay Foad
8517c90a0a Fix strange typo in markup.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208759 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-14 08:10:16 +00:00
James Molloy
05052f660b [ARM64-BE] Correct grammar mistake pointed out by Tobias.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208580 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-12 15:30:31 +00:00
James Molloy
85918049ab [ARM64-BE] Add sphinx documentation for the ARM64 NEON implementation.
There are some interesting decisions based on non-obvious rationale in
the ARM64-BE NEON implementation - decent documentation is definitely required.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208577 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-12 15:13:39 +00:00
Hal Finkel
70a83b490e [PowerPC] Add global named register support
Support for the intrinsics that read from and write to global named registers
is added for r1, r2 and r13 (depending on the subtarget).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208509 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-11 19:29:11 +00:00
Reid Kleckner
d30c11edde Revert "[ms-cxxabi] Add a new calling convention that swaps 'this' and 'sret'"
This reverts commit r200561.

This calling convention was an attempt to match the MSVC C++ ABI for
methods that return structures by value.  This solution didn't scale,
because it would have required splitting every CC available on Windows
into two: one for methods and one for free functions.

Now that we can put sret on the second arg (r208453), and Clang does
that (r208458), revert this hack.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208459 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-09 22:56:42 +00:00
Duncan P. N. Exon Smith
76c17d324c IR: Don't allow non-default visibility on local linkage
Visibilities of `hidden` and `protected` are meaningless for symbols
with local linkage.

  - Change the assembler to reject non-default visibility on symbols
    with local linkage.

  - Change the bitcode reader to auto-upgrade `hidden` and `protected`
    to `default` when the linkage is local.

  - Update LangRef.

<rdar://problem/16141113>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208263 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-07 22:57:20 +00:00
Daniel Sanders
d80222a48b [tablegen] Add !listconcat operator with the similar semantics as !strconcat
Summary:
It concatenates two or more lists. In addition to the !strconcat semantics
the lists must have the same element type.

My overall aim is to make it easy to append to Instruction.Predicates
rather than override it. This can be done by concatenating lists passed as
arguments, or by concatenating lists passed in additional fields.

Reviewers: dsanders

Reviewed By: dsanders

Subscribers: hfinkel, llvm-commits

Differential Revision: http://reviews.llvm.org/D3506

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208183 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-07 10:13:19 +00:00
Justin Bogner
ffb8718ee5 llvm-cov: Document --no-output in the command guide
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208151 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-07 02:33:58 +00:00
Renato Golin
22f779d1fd Implememting named register intrinsics
This patch implements the infrastructure to use named register constructs in
programs that need access to specific registers (bare metal, kernels, etc).

So far, only the stack pointer is supported as a technology preview, but as it
is, the intrinsic can already support all non-allocatable registers from any
architecture.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208104 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-06 16:51:25 +00:00
Bob Wilson
534ec26d07 Add some details to the llvm-cov documentation. <rdar://problem/15819496>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208098 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-06 15:58:06 +00:00
Richard Smith
64cd55a126 Update programmers manual to cover llvm::function_ref, and add a note to the
coding standard suggesting using it instead of the (unavailable) std::function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208067 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-06 07:45:39 +00:00