The dwo_name was added to dwo files to improve diagnostics in dwp, but
it confuses tools that attempt to load any dwo named by a dwo_name, even
ones inside dwos. Avoid this by keeping track of whether a unit is
already a dwo unit, and if so, not loading further dwos.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267241 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Follow up to D19291: it now makes sense to use two Intr*Mem properties,
in particular IntrReadMem + IntrArgMemOnly is common.
Pointed out by Mikael Holmén.
Reviewers: uabelho, joker.eph, reames
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D19418
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267238 91177308-0d34-0410-b5e6-96231b3b80d8
This intrinsic takes two arguments, ``%ptr`` and ``%offset``. It loads
a 32-bit value from the address ``%ptr + %offset``, adds ``%ptr`` to that
value and returns it. The constant folder specifically recognizes the form of
this intrinsic and the constant initializers it may load from; if a loaded
constant initializer is known to have the form ``i32 trunc(x - %ptr)``,
the intrinsic call is folded to ``x``.
LLVM provides that the calculation of such a constant initializer will
not overflow at link time under the medium code model if ``x`` is an
``unnamed_addr`` function. However, it does not provide this guarantee for
a constant initializer folded into a function body. This intrinsic can be
used to avoid the possibility of overflows when loading from such a constant.
Differential Revision: http://reviews.llvm.org/D18367
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267223 91177308-0d34-0410-b5e6-96231b3b80d8
The relative vtable ABI (PR26723) needs PLT relocations to refer to virtual
functions defined in other DSOs. The unnamed_addr attribute means that the
function's address is not significant, so we're allowed to substitute it
with the address of a PLT entry.
Also includes a bonus feature: addends for COFF image-relative references.
Differential Revision: http://reviews.llvm.org/D17938
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267211 91177308-0d34-0410-b5e6-96231b3b80d8
Also add a very basic test, since apparently there aren't any tests
for DCE whatsoever to add the new pass version to.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267196 91177308-0d34-0410-b5e6-96231b3b80d8
E.g. for:
!1 = {"llvm.distribute", i32 1}
it now returns the MDOperand for 1.
I will use this in LoopDistribution to check the value of the metadata.
Note that the change is backward-compatible with its current use in
LoopVersioningLICM. An Optional implicitly converts to a bool depending
whether it contains a value or not.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267190 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
CachingMemorySSAWalker::invalidateInfo was using IsCall to determine
which cache map needed to be cleared of entries referring to the invalidated
MemoryAccess, but there could also be entries referring to it in the
other cache map (value entries, not key entries). This change just
clears both tables to be conservatively correct.
Also add a verifyRemoved() function, called when expensive
checks (i.e. XDEBUG) are enabled to verify that the invalidated
MemoryAccess object is not referenced in any of the caches.
Reviewers: dberlin, george.burgess.iv
Subscribers: mcrosier, llvm-commits
Differential Revision: http://reviews.llvm.org/D19388
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267157 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
This new pass allows targets to use the hazard recognizer without having
to also run one of the schedulers. This is useful when compiling with
optimizations disabled for targets that still need noop hazards
to be handled correctly.
Reviewers: hfinkel, atrick
Subscribers: arsenm, llvm-commits
Differential Revision: http://reviews.llvm.org/D18594
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267156 91177308-0d34-0410-b5e6-96231b3b80d8
r267049 broke multiple buildbots (e.g. clang-cmake-mips, and clang-x86_64-linux-selfhost-modules) which the follow-ups have not yet resolved and this is preventing subsequent committers from being notified about additional failures on the affected buildbots.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267148 91177308-0d34-0410-b5e6-96231b3b80d8
EarlyCSE had inconsistent behavior with regards to flag'd instructions:
- In some cases, it would pessimize if the available instruction had
different flags by not performing CSE.
- In other cases, it would miscompile if it replaced an instruction
which had no flags with an instruction which has flags.
Fix this by being more consistent with our flag handling by utilizing
andIRFlags.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267111 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Also adds a small comment blurb on control flow + no-wrap flags, since
that question came up a few days back on llvm-dev.
Reviewers: bjarke.roune, broune
Subscribers: sanjoy, mcrosier, llvm-commits, mzolotukhin
Differential Revision: http://reviews.llvm.org/D19209
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267110 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
This intrinsic returns true if the current thread belongs to a live pixel
and false if it belongs to a pixel that we are executing only for derivative
computation. It will be used by Mesa to implement gl_HelperInvocation.
Note that for pixels that are killed during the shader, this implementation
also returns true, but it doesn't matter because those pixels are always
disabled in the EXEC mask.
This unearthed a corner case in the instruction verifier, which complained
about a v_cndmask 0, 1, exec, exec<imp-use> instruction. That's stupid but
correct code, so make the verifier accept it as such.
Reviewers: arsenm, tstellarAMD
Subscribers: arsenm, llvm-commits
Differential Revision: http://reviews.llvm.org/D19191
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267102 91177308-0d34-0410-b5e6-96231b3b80d8
Evaluates fmul+fadd -> fmadd combines and similar code sequences in the
machine combiner. It adds support for float and double similar to the existing
integer implementation. The key features are:
- DAGCombiner checks whether it should combine greedily or let the machine
combiner do the evaluation. This is only supported on ARM64.
- It gives preference to throughput over latency: the heuristic used is
to combine always in loops. The targets decides whether the machine
combiner should optimize for throughput or latency.
- Supports for fmadd, f(n)msub, fmla, fmls patterns
- On by default at O3 ffast-math
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267098 91177308-0d34-0410-b5e6-96231b3b80d8
This removes the interfaces added (and not yet complete) to support
lazy reading of summaries. This support is not expected to be needed
since we are moving to a model where the full index is only being
traversed in the thin link step, instead of the back ends.
(The second part of this that I plan to do next is remove the
GlobalValueInfo from the ModuleSummaryIndex - it was mostly needed to
support lazy parsing of summaries. The index can instead reference the
summary structures directly.)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267097 91177308-0d34-0410-b5e6-96231b3b80d8
We'd disabled them on x86 because back in the early days some host tools
couldn't handle the new load commands. This no longer holds: anyone capable of
deploying Clang should be able to deploy its copies of ar/ranlib/etc.
rdar://25254790
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267075 91177308-0d34-0410-b5e6-96231b3b80d8
When printing the properties required by a pass, only print the
properties that are set, and not those that are clear (only properties
that are set are verified, clear properties are "don't-care").
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267070 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Adds an instrumentation pass for the new EfficiencySanitizer ("esan")
performance tuning family of tools. Multiple tools will be supported
within the same framework. Preliminary support for a cache fragmentation
tool is included here.
The shared instrumentation includes:
+ Turn mem{set,cpy,move} instrinsics into library calls.
+ Slowpath instrumentation of loads and stores via callouts to
the runtime library.
+ Fastpath instrumentation will be per-tool.
+ Which memory accesses to ignore will be per-tool.
Reviewers: eugenis, vitalybuka, aizatsky, filcab
Subscribers: filcab, vkalintiris, pcc, silvas, llvm-commits, zhaoqin, kcc
Differential Revision: http://reviews.llvm.org/D19167
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267058 91177308-0d34-0410-b5e6-96231b3b80d8
InstrProfSymtab::create can fail with instrprof_error::malformed, but
this error is silently dropped. Propagate the error up to the caller so
we fail early.
Eventually, I'd like to transition ProfileData over to the new Error
class so we can't ignore hard failures like this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267055 91177308-0d34-0410-b5e6-96231b3b80d8
splitting edges.
MachineBasicBlock::SplitCriticalEdges will crash if a nullptr would have
been passed for the Pass argument. Do not allow that by turning this
argument into a reference.
The alternative would have been to make the Pass a truly optional
argument, but although this is easy to do, I was afraid users using it
like this would not be aware the livness information, dominator tree and
such would silently be broken.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267052 91177308-0d34-0410-b5e6-96231b3b80d8
PDB parsing code was hand-rolled into llvm-pdbdump. This patch moves the
parsing of this code into DebugInfoPDB and makes the dumper use this.
This is achieved by implementing the skeleton of RawPdbSession, the
non-DIA counterpart to the existing PDB read interface. None of the type /
source file / etc information is accessible yet, so this implementation is
not yet close to achieving parity with the DIA counterpart, but the
RawSession class simply holds a reference to a PDBFile class which handles
parsing the file format. Additionally a PDBStream class is introduced
which allows accessing the bytes of a particular stream in a PDB file.
Differential Revision: http://reviews.llvm.org/D19343
Reviewed By: majnemer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267049 91177308-0d34-0410-b5e6-96231b3b80d8
Introduce canSplitCriticalEdge, so that clients can now query whether or
not a critical edge can be split without actually needing to split it.
This may be useful when gathering information for cost models for
instance.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267046 91177308-0d34-0410-b5e6-96231b3b80d8
When custom lowered, this is not called if the store is custom
lowered. Move it to be a utility function so targets can
easily expand unaligned accesses when custom lowering.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267029 91177308-0d34-0410-b5e6-96231b3b80d8
Instead of holding a mask, hold two value: the start index and the
length of the mapping. This is a more compact representation, although
less powerful. That being said, arbitrary masks would not have worked
for the generic so do not allow them in the first place.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267025 91177308-0d34-0410-b5e6-96231b3b80d8
This patch implements a optimization bisect feature, which will allow optimizations to be selectively disabled at compile time in order to track down test failures that are caused by incorrect optimizations.
The bisection is enabled using a new command line option (-opt-bisect-limit). Individual passes that may be skipped call the OptBisect object (via an LLVMContext) to see if they should be skipped based on the bisect limit. A finer level of control (disabling individual transformations) can be managed through an addition OptBisect method, but this is not yet used.
The skip checking in this implementation is based on (and replaces) the skipOptnoneFunction check. Where that check was being called, a new call has been inserted in its place which checks the bisect limit and the optnone attribute. A new function call has been added for module and SCC passes that behaves in a similar way.
Differential Revision: http://reviews.llvm.org/D19172
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267022 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
IntrReadWriteArgMem simply becomes IntrArgMemOnly.
So there are fewer intrinsic properties that express their orthogonality
better, and correspond more closely to the corresponding IR attributes.
Suggested by: Philip Reames
Reviewers: joker.eph, reames, tstellarAMD
Subscribers: jholewinski, arsenm, llvm-commits
Differential Revision: http://reviews.llvm.org/D19291
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267021 91177308-0d34-0410-b5e6-96231b3b80d8
"Into" was misleading. I am also planning to use this helper to look
for loop metadata and return the argument, so find seems like a better
name.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267013 91177308-0d34-0410-b5e6-96231b3b80d8
A DenseMap doesn't store the hashes, so it needs to recompute them when
the table is resized.
In some applications the hashing cost is noticeable. That is the case
for example in lld for symbol names (StringRef).
This patch adds a templated structure that can wraps any value that can
go in a DenseMap and caches the hash.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@266981 91177308-0d34-0410-b5e6-96231b3b80d8
