Commit Graph

7 Commits

Author SHA1 Message Date
dfukalov 9068c20965 [AMDGPU][CostModel] Refine cost model for half- and quarter-rate instructions.
1. Throughput and codesize costs estimations was separated and updated.
2. Updated fdiv cost estimation for different cases.
3. Added scalarization processing for types that are treated as !isSimple() to
improve codesize estimation in getArithmeticInstrCost() and
getArithmeticInstrCost(). The code was borrowed from TCK_RecipThroughput path
of base implementation.

Next step is unify scalarization part in base class that is currently works for
TCK_RecipThroughput path only.

Reviewed By: rampitec

Differential Revision: https://reviews.llvm.org/D89973
2020-10-24 19:53:08 +03:00
Stanislav Mekhanoshin f7a7efbf88 [AMDGPU] Tweak getTypeLegalizationCost()
Even though wide vectors are legal they still cost more as we
will have to eventually split them. Not all operations can
be uniformly done on vector types.

Conservatively add the cost of splitting at least to 8 dwords,
which is our widest possible load.

We are more or less lying to cost mode with this change but
this can prevent vectorizer from creation of wide vectors which
results in RA problems for us.

Differential Revision: https://reviews.llvm.org/D83078
2020-07-06 14:07:48 -07:00
Stanislav Mekhanoshin b8ac5894a1 [AMDGPU] Fixed cost model for packed 16 bit ops
Differential Revision: https://reviews.llvm.org/D71622
2019-12-17 15:14:17 -08:00
dfukalov 47a5c36b37 [AMDGPU] Improve code size cost model (part 2)
Summary: Added estimations for ShuffleVector, some cast and arithmetic instructions

Reviewers: rampitec

Reviewed By: rampitec

Subscribers: arsenm, kzhuravl, jvesely, wdng, nhaehnle, yaxunl, dstuttard, tpr, t-tye, hiraditya, zzheng, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D69629
2019-11-06 13:55:48 +03:00
Tim Renouf e30aa6a136 [AMDGPU] Prepare for introduction of v3 and v5 MVTs
AMDGPU would like to have MVTs for v3i32, v3f32, v5i32, v5f32. This
commit does not add them, but makes preparatory changes:

* Fixed assumptions of power-of-2 vector type in kernel arg handling,
  and added v5 kernel arg tests and v3/v5 shader arg tests.

* Added v5 tests for cost analysis.

* Added vec3/vec5 arg test cases.

Some of this patch is from Matt Arsenault, also of AMD.

Differential Revision: https://reviews.llvm.org/D58928

Change-Id: I7279d6b4841464d2080eb255ef3c589e268eabcd
llvm-svn: 356342
2019-03-17 21:04:16 +00:00
Matt Arsenault 3dbeefa978 AMDGPU: Mark all unspecified CC functions in tests as amdgpu_kernel
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
2017-03-21 21:39:51 +00:00
Matt Arsenault 8c8fcb2585 AMDGPU: Cost model for basic integer operations
This resolves bug 21148 by preventing promotion to
i64 induction variables.

llvm-svn: 264376
2016-03-25 01:16:40 +00:00