| Commit message (Collapse) | Author | Age | Files | Lines |
|---|
| |
|
|
|
|
|
|
|
|
| |
min/max lit tests.
Reviewers: arsenm
Differential Revision: https://reviews.llvm.org/D67712
llvm-svn: 372340
|
| |
|
|
|
|
| |
Should avoid regression from D62341
llvm-svn: 363899
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
Summary:
The DAGCombiner is rewriting (canonicalizing) an ISD::ADD
with no common bits set in the operands as an ISD::OR node.
This could sometimes result in "missing out" on some
combines that normally are performed for ADD. To be more
specific this could happen if we already have rewritten an
ADD into OR, and later (after legalizations or combines)
we expose patterns that could have been optimized if we
had seen the OR as an ADD (e.g. reassociations based on ADD).
To make the DAG combiner less sensitive to if ADD or OR is
used for these "no common bits set" ADD/OR operations we
now apply most of the ADD combines also to an OR operation,
when value tracking indicates that the operands have no
common bits set.
Reviewers: spatel, RKSimon, craig.topper, kparzysz
Reviewed By: spatel
Subscribers: arsenm, rampitec, lebedev.ri, jvesely, nhaehnle, hiraditya, javed.absar, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D59758
llvm-svn: 358965
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
This replaces most argument uses with loads, but for
now not all.
The code in SelectionDAG for calling convention lowering
is actively harmful for amdgpu_kernel. It attempts to
split the argument types into register legal types, which
results in low quality code for arbitary types. Since
all kernel arguments are passed in memory, we just want the
raw types.
I've tried a couple of methods of mitigating this in SelectionDAG,
but it's easier to just bypass this problem alltogether. It's
possible to hack around the problem in the initial lowering,
but the real problem is the DAG then expects to be able to use
CopyToReg/CopyFromReg for uses of the arguments outside the block.
Exposing the argument loads in the IR also has the advantage
that the LoadStoreVectorizer can merge them.
I'm not sure the best approach to dealing with the IR
argument list is. The patch as-is just leaves the IR arguments
in place, so all the existing code will still compute the same
kernarg size and pointlessly lowers the arguments.
Arguably the frontend should emit kernels with an empty argument
list in the first place. Alternatively a dummy array could be
inserted as a single argument just to reserve space.
This does have some disadvantages. Local pointer kernel arguments can
no longer have AssertZext placed on them as the equivalent !range
metadata is not valid on pointer typed loads. This is mostly bad
for SI which needs to know about the known bits in order to use the
DS instruction offset, so in this case this is not done.
More importantly, this skips noalias arguments since this pass
does not yet convert this to the equivalent !alias.scope and !noalias
metadata. Producing this metadata correctly seems to be tricky,
although this logically is the same as inlining into a function which
doesn't exist. Additionally, exposing these loads to the vectorizer
may result in degraded aliasing information if a pointer load is
merged with another argument load.
I'm also not entirely sure this is preserving the current clover
ABI, although I would greatly prefer if it would stop widening
arguments and match the HSA ABI. As-is I think it is extending
< 4-byte arguments to 4-bytes but doesn't align them to 4-bytes.
llvm-svn: 335650
|
| |
|
|
|
|
|
| |
Some image loads return these, and it's awkward working
around them not being legal.
llvm-svn: 334835
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
This has two main components. First, widen
widen short constant loads in DAG when they have
the correct alignment. This is already done a bit in
AMDGPUCodeGenPrepare, since that has access to
DivergenceAnalysis. This can't help kernarg loads
created in the DAG. Start to use DAG divergence analysis
to help this case.
The second part is to avoid kernel argument lowering
breaking the alignment of short vector elements because
calling convention lowering wants to split everything
into legal register types.
When loading a split type, load the nearest 4-byte aligned
segment and shift to get the desired bits. This extra
load of the earlier argument piece ends up merging,
and the bit extract hopefully folds out.
There are a number of improvements and regressions with
this, but I think as-is this is a better compromise between
several of the worst parts of SelectionDAG.
Particularly when i16 is legal, this produces worse code
for i8 and i16 element vector kernel arguments. This is
partially due to the very weak load merging the DAG does.
It only looks for fairly specific combines between pairs
of loads which no longer appear. In particular this
causes v4i16 loads to be split into 2 components when
previously the two halves were merged.
Worse, because of the newly introduced shifts, there
is a lot more unnecessary vector packing and unpacking code
emitted. At least some of this is due to reporting
false for isTypeDesirableForOp for i16 as a workaround for
the lack of divergence information in the DAG. The cases
where this happens it doesn't actually matter, but the
relevant code in SimplifyDemandedBits doens't have the context
to know to ignore this.
The use of the scalar cache is probably more important
than the mess of mostly scalar instructions doing this packing
and unpacking. Future work can fix this, possibly by making better
use of the new DAG divergence information for controlling promotion
decisions, or adding another version of shift + trunc + shift
combines that doesn't only know about the used types.
llvm-svn: 334180
|
| |
|
|
| |
llvm-svn: 333024
|
| |
|
|
|
|
|
|
|
|
|
|
| |
This usually results in better code. Fixes using
inline asm with short2, and also fixes having a different
ABI for function parameters between VI and gfx9.
Partially cleans up the mess used for lowering of the d16
operations. Making v4f16 legal will help clean this up more,
but this requires additional work.
llvm-svn: 332953
|
| |
|
|
|
|
|
|
| |
Literal encoding needs op_sel_hi to select low 16 bit in this case.
Differential Revision: https://reviews.llvm.org/D45745
llvm-svn: 330230
|
| |
|
|
|
|
|
|
|
|
|
|
| |
- Add gfx704
- Change bonaire to gfx704
- Remove gfx804
- Remove gfx901
- Remove gfx903
Differential Revision: https://reviews.llvm.org/D40046
llvm-svn: 320194
|
| |
|
|
|
|
|
|
|
|
|
|
| |
v_{add/addc/sub/subrev/subb/subbrev}
See bug 34765: https://bugs.llvm.org//show_bug.cgi?id=34765
Reviewers: tamazov, SamWot, arsenm, vpykhtin
Differential Revision: https://reviews.llvm.org/D40088
llvm-svn: 318675
|
| |
|
|
|
|
|
| |
Keeping non-i16 extloads makes it easier to match some new
gfx9 load instructions.
llvm-svn: 312699
|
| |
|
|
| |
llvm-svn: 309470
|
| |
|
|
|
|
| |
Differential revision: https://reviews.llvm.org/D34407
llvm-svn: 307097
|
| |
|
|
|
|
|
|
|
| |
It broke a testcase.
Failing Tests (1):
LLVM :: CodeGen/AMDGPU/alignbit-pat.ll
llvm-svn: 307054
|
| |
|
|
|
|
| |
Differential revision: https://reviews.llvm.org/D34407
llvm-svn: 307026
|
| |
|
|
|
|
|
|
|
|
|
|
| |
Remove dependency of SDWA pass on SIShrinkInstructions.
The goal is to move SDWA even higher in the stack to avoid second run
of MachineLICM, MachineCSE and SIFoldOperands.
Also added handling to preserve original src modifiers.
Differential Revision: https://reviews.llvm.org/D33860
llvm-svn: 304665
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
An encoding does not allow to use SDWA in an instruction with
scalar operands, either literals or SGPRs. That is however possible
to copy these operands into a VGPR first.
Several copies of the value are produced if multiple SDWA conversions
were done. To cleanup MachineLICM (to hoist copies out of loops),
MachineCSE (to remove duplicate copies) and SIFoldOperands (to replace
SGPR to VGPR copy with immediate copy right to the VGPR) runs are added
after the SDWA pass.
Differential Revision: https://reviews.llvm.org/D33583
llvm-svn: 304219
|
| |
|
|
|
|
| |
Differential Revision: https://reviews.llvm.org/D32361
llvm-svn: 301028
|
| |
|
|
|
|
|
|
|
|
| |
Reviewers: vpykhtin, rampitec, arsenm
Subscribers: qcolombet, kzhuravl, wdng, nhaehnle, yaxunl, dstuttard, tpr, t-tye
Differential Revision: https://reviews.llvm.org/D31671
llvm-svn: 299654
|
| |
|
|
|
|
|
|
|
|
|
| |
Reason: breaks multiple bots:
http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-fast/builds/3988
http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-bootstrap/builds/1173
Original Review URL: https://reviews.llvm.org/D31671
llvm-svn: 299583
|
| |
|
|
|
|
|
|
|
|
| |
Reviewers: vpykhtin, rampitec, arsenm
Subscribers: qcolombet, kzhuravl, wdng, nhaehnle, yaxunl, dstuttard, tpr, t-tye
Differential Revision: https://reviews.llvm.org/D31671
llvm-svn: 299536
|
| |
|
|
|
|
|
|
|
|
|
|
| |
Currently the default C calling convention functions are treated
the same as compute kernels. Make this explicit so the default
calling convention can be changed to a non-kernel.
Converted with perl -pi -e 's/define void/define amdgpu_kernel void/'
on the relevant test directories (and undoing in one place that actually
wanted a non-kernel).
llvm-svn: 298444
|
|
|
llvm-svn: 296396
|
