The original commit was actually 2 unrelated bug fixes, but it turns
out the second bug fix wasn't quite correct, so the entire patch was
reverted. Resubmitting this half of the patch by itself, then will
follow up with a new patch which fixes the rest of the issue in a
more appropriate way.
llvm-svn: 346505
A minor improvement of buildVector() that skips creating an
INSERT_VECTOR_ELT for a Value which has already been used for the
REPLICATE.
Review: Ulrich Weigand
https://reviews.llvm.org/D54315
llvm-svn: 346504
Summary:
These get passed to HandleTopLevelDecl() if they happen to have been
deserialized for any reason. We don't want to treat them as part of the
main file.
Reviewers: ilya-biryukov
Subscribers: ioeric, MaskRay, jkorous, arphaman, kadircet, cfe-commits
Differential Revision: https://reviews.llvm.org/D54303
llvm-svn: 346503
Now that we have mixed type sizes, i1 values need to be explicitly
handled as we want to avoid promoting these values.
Differential Revision: https://reviews.llvm.org/D54308
llvm-svn: 346499
I noticed that we weren't generating broadcasts as much I thought we would with
D54271, and this is part of the problem.
Widening the shuffle elements means adding bitcasts and hiding the relationship
between a splatted scalar and the vector. If we can form a broadcast, do that
before going through the rest of the shuffle lowering because broadcasts should
be cheap and can often be load-folded.
Differential Revision: https://reviews.llvm.org/D54280
llvm-svn: 346498
Summary:
This simplifies the code and moves everything to tablegen for consistency. This
also prepares the ground for adding issue counters.
Reviewers: gchatelet, john.brawn, jsji
Subscribers: nemanjai, mgorny, javed.absar, kbarton, tschuett, llvm-commits
Differential Revision: https://reviews.llvm.org/D54297
llvm-svn: 346489
Our testing didn't reflect reality: live clangd almost always uses a
preamble, and sometimes the preamble behaves differently.
This patch fixes a common test helper to be more realistic.
Preamble doesn't preserve information about which tokens come from the
command-line (this gets inlined into a source file). So remove logic
that attempts to treat symbols with such names differently.
A SymbolCollectorTest tries to verify that locals in headers are not
indexed, with preamble enabled this is only meaningful for locals of
auto-typed functions (otherwise the bodies aren't parsed).
Tests were relying on the fact that the findAnyDecl helper actually did expose
symbols from headers. Resolve by making all these functions consistently
able to find symbols in headers/preambles.
llvm-svn: 346488
Use a simple SmallVector to track the lifetime of simulated instructions.
An ordered map was not needed because instructions are already picked in program
order. It is also much faster if we avoid searching for already retired
instructions at the end of every cycle.
The new policy only triggers a "garbage collection" when the number of retired
instructions becomes significantly big when compared with the total size of the
vector.
While working on this, I noticed that instructions were correctly retired, but
their internal state was not updated (i.e. there was no transition from the
EXECUTED state, to the RETIRED state). While this was not a problem for the
views, it prevented the EntryStage from correctly garbage collecting already
retired instructions. That was a bad oversight, and this patch fixes it.
The observed speedup on a debug build of llvm-mca after this patch is ~6%.
On a release build of llvm-mca, the observed speedup is ~%15%.
llvm-svn: 346487
After D45330, Dominators are required for IPSCCP and can be preserved.
This patch preserves DominatorTreeAnalysis in the new pass manager. AFAIK the legacy pass manager cannot preserve function analysis required by a module analysis.
Reviewers: davide, dberlin, chandlerc, efriedma, kuhar, NutshellySima
Reviewed By: chandlerc, kuhar, NutshellySima
Differential Revision: https://reviews.llvm.org/D47259
llvm-svn: 346486
The DAGCombiner tries to SimplifySelectCC as follows:
select_cc(x, y, 16, 0, cc) -> shl(zext(set_cc(x, y, cc)), 4)
It can't cope with the situation of reordered operands:
select_cc(x, y, 0, 16, cc)
In that case we just need to swap the operands and invert the Condition Code:
select_cc(x, y, 16, 0, ~cc)
Differential Revision: https://reviews.llvm.org/D53236
llvm-svn: 346484
We can stop recording conditions once we reached the immediate dominator
for the block containing the call site. Conditions in predecessors of the
that node will be the same for all paths to the call site and splitting
is not beneficial.
This patch makes CallSiteSplitting dependent on the DT anlysis. because
the immediate dominators seem to be the easiest way of finding the node
to stop at.
I had to update some exiting tests, because they were checking for
conditions that were true/false on all paths to the call site. Those
should now be handled by instcombine/ipsccp.
Reviewers: davide, junbuml
Reviewed By: junbuml
Differential Revision: https://reviews.llvm.org/D44627
llvm-svn: 346483
In SimplifyCFG when given a conditional branch that goes to BB1 and BB2, the hoisted common terminator instruction in the two blocks, caused debug line records associated with subsequent select instructions to become ambiguous. It causes the debugger to display unreachable source lines.
Differential Revision: https://reviews.llvm.org/D53390
llvm-svn: 346481
Previously, during the search, all values had to have the same
'TypeSize', which is equal to number of bits of the integer type of
the icmp operand. All values in the tree had to match this size;
meaning that, if we searched from i16, we wouldn't accept i8s. A
change in type size requires zext and truncs to perform the casts so,
to allow mixed narrow types, the handling of these instructions is
now slightly different:
- we allow casts if their result or operand is <= TypeSize.
- zexts are sinks if their result > TypeSize.
- truncs are still sinks if their operand == TypeSize.
- truncs are still sources if their result == TypeSize.
The transformation bails on finding an icmp that operates on data
smaller than the current TypeSize.
Differential Revision: https://reviews.llvm.org/D54108
llvm-svn: 346480
A few code movement things:
- AreSymmetrical is now a method of BinOpChain.
- Created a lambda in CreateParallelMACPairs to reduce loop nesting.
- A Reduction object now gets pasted in a couple of places instead,
including CreateParallelMACPairs so it doesn't need to return a
value.
I've also added RecordSequentialLoads, which is run before the
transformation begins, and caches the interesting loads. This can then
be queried later instead of cross checking many load values.
Differential Revision: https://reviews.llvm.org/D54254
llvm-svn: 346479
This change adds a static check to ensure that all data metadata record
payloads don't go past the available buffers in Metadata records.
llvm-svn: 346476
Summary:
Before this change, we could run into a situation where we may try to
undo tail exit records after writing metadata records before a function
enter event. This change rectifies that by resetting the tail exit
counter after writing the metadata records.
Reviewers: mboerger
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D54292
llvm-svn: 346475
Summary:
We need these fences to ensure that other threads attempting to read
bytes in the buffer will see thw writes committed before the extents are
updated. Without these, the writes can be un-committed by the time the
buffer extents counter is updated -- the fences should ensure that the
records written into the log have completed by the time we observe the
buffer extents from different threads.
Reviewers: mboerger
Subscribers: jfb, llvm-commits
Differential Revision: https://reviews.llvm.org/D54291
llvm-svn: 346474
Summary:
This change covers a number of things spanning LLVM and compiler-rt,
which are related in a non-trivial way.
In LLVM, we have a library that handles the FDR mode even log loading,
which uses C++'s runtime polymorphism feature to better faithfully
represent the events that are written down by the FDR mode runtime. We
do this by interpreting a trace that's serliased in a common format
agreed upon by both the trace loading library and the FDR mode runtime.
This library is under active development, which consists of features
allowing us to reconstitute a higher-level event log.
This event log is used by the conversion and visualisation tools we have
for interpreting XRay traces.
One of the tools we have is a diagnostic tool in llvm-xray called
`fdr-dump` which we've been using to debug our expectations of what the
FDR runtime should be writing and what the logical FDR event log
structures are. We use this fairly extensively to reason about why some
non-trivial traces we're generating with FDR mode runtimes fail to
convert or fail to parse correctly.
One of these failures we've found in manual debugging of some of the
traces we've seen involve an inconsistency between the buffer extents (a
record indicating how many bytes to follow are part of a logical
thread's event log) and the record of the bytes written into the log --
sometimes it turns out the data could be garbage, due to buffers being
recycled, but sometimes we're seeing the buffer extent indicating a log
is "shorter" than the actual records associated with the buffer. This
case happens particularly with function entry records with a call
argument.
This change for now updates the FDR mode runtime to write the bytes for
the function call and arg record before updating the buffer extents
atomically, allowing multiple threads to see a consistent view of the
data in the buffer using the atomic counter associated with a buffer.
What we're trying to prevent here is partial updates where we see the
intermediary updates to the buffer extents (function record size then
call argument record size) becoming observable from another thread, for
instance, one doing the serialization/flushing.
To do both diagnose this issue properly, we need to be able to honour
the extents being set in the `BufferExtents` records marking the
beginning of the logical buffers when reading an FDR trace. Since LLVM
doesn't use C++'s RTTI mechanism, we instead follow the advice in the
documentation for LLVM Style RTTI
(https://llvm.org/docs/HowToSetUpLLVMStyleRTTI.html). We then rely on
this RTTI feature to ensure that our file-based record producer (our
streaming "deserializer") can honour the extents of individual buffers
as we interpret traces.
This also sets us up to be able to eventually do smart
skipping/continuation of FDR logs, seeking instead to find BufferExtents
records in cases where we find potentially recoverable errors. In the
meantime, we make this change to operate in a strict mode when reading
logical buffers with extent records.
Reviewers: mboerger
Subscribers: hiraditya, llvm-commits, jfb
Differential Revision: https://reviews.llvm.org/D54201
llvm-svn: 346473
The second parameter of vec_sr function is representing shift bits and it should be modulo the number of bits in the element like what vec_sl does now.
This is actually required by the ABI:
Each element of the result vector is the result of logically right shifting the corresponding
element of ARG1 by the number of bits specified by the value of the corresponding
element of ARG2, modulo the number of bits in the element. The bits that are shifted out
are replaced by zeros.
Differential Revision: https://reviews.llvm.org/D54087
llvm-svn: 346471
CMake invokes rc using the joined spelling which appears to be supported
by Microsoft's rc implementation, so we should support it as well.
Differential Revision: https://reviews.llvm.org/D54191
llvm-svn: 346470
The whole point of this change was making it possible to resolve paths
without depending on the FileSystem, which is not what I did here. Not
sure what I was thinking...
llvm-svn: 346466
Summary:
Reorders the sections in the SIMD tablegen file to roughly match the
new opcode ordering. Depends on D54126.
Reviewers: aheejin, dschuff
Subscribers: sbc100, jgravelle-google, sunfish, llvm-commits
Differential Revision: https://reviews.llvm.org/D54134
llvm-svn: 346464
A previous commit fixed an issue with our AST generation where
we were outputting enum decls incorrectly. But we forgot to
update the test output. This patch updates the test output
accordingly.
llvm-svn: 346459
In order to call real_path from the TildeExpressionResolver we need
access to the FileSystem. Since the resolver lives under utility we have
to pass in the FS.
llvm-svn: 346457
Zachary Turner