Commit Graph

5399 Commits

Author SHA1 Message Date
Alexey Samsonov
79e9b30b11 Introduce -DLLVM_USE_SANITIZER=Undefined CMake option to build UBSan-ified version of LLVM/Clang.
I've fixed most of the simple bugs and currently "check-llvm" test suite
has 26 failures, and "check-clang" suite has 5 failures.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216701 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-29 00:50:36 +00:00
Reid Kleckner
44b3a0b411 Declare that musttail calls in variadic functions forward the ellipsis
Summary:
There is no functionality change here except in the way we assemble and
dump musttail calls in variadic functions. There's really no need to
separate out the bits for musttail and "is forwarding varargs" on call
instructions. A musttail call by definition has to forward the ellipsis
or it would fail verification.

Reviewers: chandlerc, nlewycky

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D4892

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216423 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-26 00:33:28 +00:00
Hans Wennborg
21f375620d ProgrammersManual: the flag is called -debug-only
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216316 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-23 04:34:58 +00:00
Rafael Espindola
e5e847a500 Clear the llvm release notes to make room for 3.6.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216292 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-22 21:57:38 +00:00
David Blaikie
c7260209a8 Use DILexicalBlockFile, rather than DILexicalBlock, to track discriminator changes to ensure discriminator changes don't introduce new DWARF DW_TAG_lexical_blocks.
Somewhat unnoticed in the original implementation of discriminators, but
it could cause instructions to end up in new, small,
DW_TAG_lexical_blocks due to the use of DILexicalBlock to track
discriminator changes.

Instead, use DILexicalBlockFile which we already use to track file
changes without introducing new scopes, so it works well to track
discriminator changes in the same way.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216239 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-21 22:45:21 +00:00
Eric Fiselier
29863d8e18 [LIT] Remove documentation for method since it does not exist
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216204 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-21 18:52:58 +00:00
Dan Liew
0ea6d4421c Add note to LangRef about how function arguments can be unnamed and
how this affects the numbering of unnamed temporaries.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216070 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-20 15:06:30 +00:00
Duncan P. N. Exon Smith
5a466d37d8 LangRef: Move example of function-scope uselistorder to a function
Should make the example added in r216025 a little more clear.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216027 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-19 21:48:04 +00:00
Duncan P. N. Exon Smith
7838818ad7 IR: Implement uselistorder assembly directives
Implement `uselistorder` and `uselistorder_bb` assembly directives,
which allow the use-list order to be recovered when round-tripping to
assembly.

This is the bulk of PR20515.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216025 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-19 21:30:15 +00:00
Alex Lorenz
e3cea5fd9a Docs: add documentation for the coverage mapping format.
Differential Revision: http://reviews.llvm.org/D4729


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215990 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-19 17:05:58 +00:00
Duncan P. N. Exon Smith
2788345a9b CodingStandards: Document std::equal misbehaviour
I should have included this as part of r215986, which worked around this
corner by changing ArrayRef::equals() not to use std::equal.  Alas.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215988 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-19 16:49:40 +00:00
Eric Fiselier
407460e67d [LIT]Correct name of global lit configuration object to be lit_config (not lit).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215695 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-15 05:54:19 +00:00
Rafael Espindola
1c9caced63 Delete support for AuroraUX.
auroraux.org is not resolving.

I will add this to the release notes as soon as I figure out where to put the
3.6 release notes :-)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215645 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-14 15:15:09 +00:00
Dan Liew
550abf8c29 Add SPHINX_WARNINGS_AS_ERRORS CMake option to allow warnings to not be
treated as errors (which is still the default). This is useful when
working on documentation that has existing errors.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215634 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-14 11:57:13 +00:00
Nick Lewycky
12a0c0b4b3 Fix examples of "named metadata" (some of which isn't named).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215522 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-13 04:54:05 +00:00
Sylvestre Ledru
a7f0941b83 Fix typos:
* libaries => libraries
* avaiable => available



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215366 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-11 18:04:46 +00:00
Eric Christopher
aa5b9c0f6f Temporarily Revert "Nuke the old JIT." as it's not quite ready to
be deleted. This will be reapplied as soon as possible and before
the 3.6 branch date at any rate.

Approved by Jim Grosbach, Lang Hames, Rafael Espindola.

This reverts commits r215111, 215115, 215116, 215117, 215136.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215154 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-07 22:02:54 +00:00
Rafael Espindola
875710a2fd Nuke the old JIT.
I am sure we will be finding bits and pieces of dead code for years to
come, but this is a good start.

Thanks to Lang Hames for making MCJIT a good replacement!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215111 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-07 14:21:18 +00:00
Pete Cooper
e216468fef Update Tablegen documents given that binary literals are now sized
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215088 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-07 05:47:13 +00:00
JF Bastien
5e48675853 Fix typos in comments and doc
Committing http://reviews.llvm.org/D4798 for Robin Morisset (morisset@google.com)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214934 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-05 23:27:34 +00:00
Eric Christopher
9f85dccfc6 Remove the TargetMachine forwards for TargetSubtargetInfo based
information and update all callers. No functional change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214781 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-04 21:25:23 +00:00
David Blaikie
1bb69f17d8 Correct the emission kind constants committed in r214771
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214772 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-04 20:36:00 +00:00
David Blaikie
b00cca00f4 Document the "emission kind" field of the DICompileUnit in LLVM's Source Level Debugging metadata.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214771 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-04 20:32:48 +00:00
Benjamin Kramer
a6a0f12942 Update links to the gcc and java documentation that 404'd.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214700 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-04 09:26:40 +00:00
Eric Fiselier
2785e77db1 [lit] Add --show-xfail flag to LIT.
Summary:
This patch add a --show-xfail flag. If this flag is specified then each xfail test will be printed to output.
When it is not given xfail tests are ignored. Ignoring xfail tests is the current behavior.

This flag is meant to mirror the --show-unsupported flag that was recently added.

Reviewers: ddunbar, EricWF

Reviewed By: EricWF

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D4750

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214609 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-02 01:29:52 +00:00
Adrian Prantl
2a39c993eb Debug info: Infrastructure to support debug locations for fragmented
variables (for example, by-value struct arguments passed in registers, or
large integer values split across several smaller registers).
On the IR level, this adds a new type of complex address operation OpPiece
to DIVariable that describes size and offset of a variable fragment.
On the DWARF emitter level, all pieces describing the same variable are
collected, sorted and emitted as DWARF expressions using the DW_OP_piece
and DW_OP_bit_piece operators.

http://reviews.llvm.org/D3373
rdar://problem/15928306

What this patch doesn't do / Future work:
- This patch only adds the backend machinery to make this work, patches
  that change SROA and SelectionDAG's type legalizer to actually create
  such debug info will follow. (http://reviews.llvm.org/D2680)
- Making the DIVariable complex expressions into an argument of dbg.value
  will reduce the memory footprint of the debug metadata.
- The sorting/uniquing of pieces should be moved into DebugLocEntry,
  to facilitate the merging of multi-piece entries.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214576 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-01 22:11:58 +00:00
Reid Kleckner
cdc41f5bcf docs: Strongly recommend setting rpath when using a local GCC toolchain
Users keep emailing us about the difficulties of getting LD_LIBRARY_PATH
into their environment, which should be completely unecessary. Try to
strengthen the rpath recommentation by putting in an example cmake
invocation.

Speaking of which, we might want to make CMake the recommended build
system in GettingStarted.html.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214565 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-01 21:40:53 +00:00
Eric Fiselier
156ce6cc13 Add documentation for lit's --show-unsupported flag
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214431 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-31 20:11:13 +00:00
Bill Schmidt
8d6cf4ddd3 Clarify in PowerPC release notes that 32-bit PIC support is incomplete.
As requested, changing this wording slightly.

Thanks,
Bill

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214430 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-31 20:04:51 +00:00
Bill Schmidt
b74ca14f1c Wrong heading level for PowerPC changes in release notes
Oops.  Used the wrong heading level by mistake.

Thanks,
Bill

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214405 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-31 15:20:30 +00:00
Bill Schmidt
40b4bf53c9 Release Notes: Overriding PPC64 and PPC64LE ABI defaults is not yet supported.
I wrongly included a description of a patch that came in after 3.5 branched
and has not been backported.

Thanks,
Bill

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214404 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-31 15:17:33 +00:00
Bill Schmidt
b0574ad2a2 Add PowerPC release notes for 3.5.
Here's my take on 3.5 changes for PowerPC.  Others please feel free to add,
edit, delete as desired.

Thanks,
Bill

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214403 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-31 14:38:17 +00:00
Richard Smith
d1d53e81f6 Fix some grammatical errors.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214383 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-31 04:25:36 +00:00
Rafael Espindola
d57120551f Use "weak alias" instead of "alias weak"
Before this patch we had

@a = weak global ...
but
@b = alias weak ...

The patch changes aliases to look more like global variables.

Looking at some really old code suggests that the reason was that the old
bison based parser had a reduction for alias linkages and another one for
global variable linkages. Putting the alias first avoided the reduce/reduce
conflict.

The days of the old .ll parser are long gone. The new one parses just "linkage"
and a later check is responsible for deciding if a linkage is valid in a
given context.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214355 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-30 22:51:54 +00:00
Alex Lorenz
31c0b5bc44 docs: update the command guide documentation for llvm-profdata.
Differential Revision: http://reviews.llvm.org/D4726


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214331 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-30 20:30:11 +00:00
Hans Wennborg
dab34a615b LangRef: add a note about the mangling-suppressing \01 prefix
Someone asked about this on IRC the other day, and I couldn't
find the magic prefix documented anywhere.

Differential Revision: http://reviews.llvm.org/D4728

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214329 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-30 20:02:08 +00:00
Manuel Jacob
b5b178a1ed Correct vector type definition in LangRef.
According to VectorType::isValidElementType, any integer, floating point
or pointer type is a valid vector element type.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214302 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-30 12:30:06 +00:00
Hans Wennborg
0b783fc554 Update LLVM version: 3.5 => 3.6
We branched 3.5, it's now time to work on 3.6.

This is Sylvestre's patch from [1] plus regenerated configure
file by me, and minus the release notes reset, which Sean
pointed out [2] should happen later.

 1. http://reviews.llvm.org/D4660
 2. http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20140721/111137.html

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214131 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-28 22:10:52 +00:00
Dan Liew
1149da67c5 Document the new LLVM CMake interface for building against LLVM
libraries. With many contributions from Brad King.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214077 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-28 13:36:37 +00:00
Dan Liew
e301e0b9a1 Fixed sphinx warning.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214076 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-28 13:33:51 +00:00
Hal Finkel
8ef7b17dfc Add @llvm.assume, lowering, and some basic properties
This is the first commit in a series that add an @llvm.assume intrinsic which
can be used to provide the optimizer with a condition it may assume to be true
(when the control flow would hit the intrinsic call). Some basic properties are added here:

 - llvm.invariant(true) is dead.
 - llvm.invariant(false) is unreachable (this directly corresponds to the
   documented behavior of MSVC's __assume(0)), so is llvm.invariant(undef).

The intrinsic is tagged as writing arbitrarily, in order to maintain control
dependencies. BasicAA has been updated, however, to return NoModRef for any
particular location-based query so that we don't unnecessarily block code
motion.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213973 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-25 21:13:35 +00:00
Hal Finkel
6f5c609076 Simplify and improve scoped-noalias metadata semantics
In the process of fixing the noalias parameter -> metadata conversion process
that will take place during inlining (which will be committed soon, but not
turned on by default), I have come to realize that the semantics provided by
yesterday's commit are not really what we want. Here's why:

void foo(noalias a, noalias b, noalias c, bool x) {
  *q = x ? a : b;
  *c = *q;
}

Generically, we know that *c does not alias with *a and with *b (so there is an
'and' in what we know we're not), and we know that *q might be derived from *a
or from *b (so there is an 'or' in what we know that we are). So we do not want
the semantics currently, where any noalias scope matching any alias.scope
causes a NoAlias return. What we want to know is that the noalias scopes form a
superset of the alias.scope list (meaning that all the things we know we're not
is a superset of all of things the other instruction might be).

Making that change, however, introduces a composibility problem. If we inline
once, adding the noalias metadata, and then inline again adding more, and we
append new scopes onto the noalias and alias.scope lists each time. But, this
means that we could change what was a NoAlias result previously into a MayAlias
result because we appended an additional scope onto one of the alias.scope
lists. So, instead of giving scopes the ability to have parents (which I had
borrowed from the TBAA implementation, but seems increasingly unlikely to be
useful in practice), I've given them domains. The subset/superset condition now
applies within each domain independently, and we only need it to hold in one
domain. Each time we inline, we add the new scopes in a new scope domain, and
everything now composes nicely. In addition, this simplifies the
implementation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213948 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-25 15:50:02 +00:00
Hal Finkel
16fd27b2c3 Add scoped-noalias metadata
This commit adds scoped noalias metadata. The primary motivations for this
feature are:
  1. To preserve noalias function attribute information when inlining
  2. To provide the ability to model block-scope C99 restrict pointers

Neither of these two abilities are added here, only the necessary
infrastructure. In fact, there should be no change to existing functionality,
only the addition of new features. The logic that converts noalias function
parameters into this metadata during inlining will come in a follow-up commit.

What is added here is the ability to generally specify noalias memory-access
sets. Regarding the metadata, alias-analysis scopes are defined similar to TBAA
nodes:

!scope0 = metadata !{ metadata !"scope of foo()" }
!scope1 = metadata !{ metadata !"scope 1", metadata !scope0 }
!scope2 = metadata !{ metadata !"scope 2", metadata !scope0 }
!scope3 = metadata !{ metadata !"scope 2.1", metadata !scope2 }
!scope4 = metadata !{ metadata !"scope 2.2", metadata !scope2 }

Loads and stores can be tagged with an alias-analysis scope, and also, with a
noalias tag for a specific scope:

... = load %ptr1, !alias.scope !{ !scope1 }
... = load %ptr2, !alias.scope !{ !scope1, !scope2 }, !noalias !{ !scope1 }

When evaluating an aliasing query, if one of the instructions is associated
with an alias.scope id that is identical to the noalias scope associated with
the other instruction, or is a descendant (in the scope hierarchy) of the
noalias scope associated with the other instruction, then the two memory
accesses are assumed not to alias.

Note that is the first element of the scope metadata is a string, then it can
be combined accross functions and translation units. The string can be replaced
by a self-reference to create globally unqiue scope identifiers.

[Note: This overview is slightly stylized, since the metadata nodes really need
to just be numbers (!0 instead of !scope0), and the scope lists are also global
unnamed metadata.]

Existing noalias metadata in a callee is "cloned" for use by the inlined code.
This is necessary because the aliasing scopes are unique to each call site
(because of possible control dependencies on the aliasing properties). For
example, consider a function: foo(noalias a, noalias b) { *a = *b; } that gets
inlined into bar() { ... if (...) foo(a1, b1); ... if (...) foo(a2, b2); } --
now just because we know that a1 does not alias with b1 at the first call site,
and a2 does not alias with b2 at the second call site, we cannot let inlining
these functons have the metadata imply that a1 does not alias with b2.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213864 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-24 14:25:39 +00:00
Rafael Espindola
b74b9541ac Document what backwards compatibility we provide for bitcode.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213813 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-23 22:43:22 +00:00
Mark Heffernan
e8d7ebcd5a In unroll pragma syntax and loop hint metadata, change "enable" forms to a new form using the string "full".
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213772 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-23 17:31:37 +00:00
Daniel Sanders
e35dcb69b8 Added release notes for MIPS.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213749 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-23 12:59:26 +00:00
Dan Liew
66ce49d22a Revert "Treat warnings in Sphinx as errors. The reasons for doing this are..."
This reverts commit r213661.

Reverting at the request of Sean Silva.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213675 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-22 18:09:17 +00:00
Hal Finkel
b3b2aac5be Make use of the align parameter attribute for all pointer arguments
We previously supported the align attribute on all (pointer) parameters, but we
only used it for byval parameters. However, it is completely consistent at the
IR level to treat 'align n' on all pointer parameters as an alignment
assumption on the pointer, and now we wll. Specifically, this causes
computeKnownBits to use the align attribute on all pointer parameters, not just
byval parameters. I've also added an explicit parameter attribute test for this
to test/Bitcode/attributes.ll.

And I've updated the LangRef to document the align parameter attribute (as it
turns out, it was not documented at all previously, although the byval
documentation mentioned that it could be used).

There are (at least) two benefits to doing this:
 - It allows enhancing alignment based on the pointer alignment after inlining callees.
 - It allows simplification of pointer arithmetic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213670 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-22 16:58:55 +00:00
Dan Liew
976824a7a4 Added LLVM_ENABLE_RTTI and LLVM_ENABLE_EH options that allow RTTI and EH
to globally be controlled. Individual targets (e.g.  ExceptionDemo) can
still override this by using LLVM_REQUIRE_RTTI and LLVM_REQUIRE_EH if
they need to be compiled with RTTI or exception handling respectively.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213663 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-22 15:41:18 +00:00
Dan Liew
43b471c45e Treat warnings in Sphinx as errors. The reasons for doing this are...
- When CMake builds the documentation with sphinx-build it treats
  warnings as errors. We should be consistent with what we do in
  CMake.
- Having warnings treated as errors will hopefully encourage
  developers to write documentation correctly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213661 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-22 15:07:35 +00:00