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Revision tags: llvmorg-20.1.0, llvmorg-20.1.0-rc3, llvmorg-20.1.0-rc2, llvmorg-20.1.0-rc1, llvmorg-21-init, llvmorg-19.1.7, llvmorg-19.1.6, llvmorg-19.1.5, llvmorg-19.1.4, llvmorg-19.1.3, llvmorg-19.1.2, llvmorg-19.1.1, llvmorg-19.1.0, llvmorg-19.1.0-rc4, llvmorg-19.1.0-rc3, llvmorg-19.1.0-rc2, llvmorg-19.1.0-rc1, llvmorg-20-init, llvmorg-18.1.8, llvmorg-18.1.7, llvmorg-18.1.6, llvmorg-18.1.5, llvmorg-18.1.4, llvmorg-18.1.3, llvmorg-18.1.2, llvmorg-18.1.1, llvmorg-18.1.0, llvmorg-18.1.0-rc4, llvmorg-18.1.0-rc3, llvmorg-18.1.0-rc2, llvmorg-18.1.0-rc1, llvmorg-19-init, llvmorg-17.0.6, llvmorg-17.0.5, llvmorg-17.0.4, llvmorg-17.0.3, llvmorg-17.0.2, llvmorg-17.0.1, llvmorg-17.0.0, llvmorg-17.0.0-rc4, llvmorg-17.0.0-rc3, llvmorg-17.0.0-rc2, llvmorg-17.0.0-rc1, llvmorg-18-init, llvmorg-16.0.6, llvmorg-16.0.5, llvmorg-16.0.4, llvmorg-16.0.3, llvmorg-16.0.2, llvmorg-16.0.1, llvmorg-16.0.0, llvmorg-16.0.0-rc4, llvmorg-16.0.0-rc3, llvmorg-16.0.0-rc2, llvmorg-16.0.0-rc1, llvmorg-17-init, llvmorg-15.0.7, llvmorg-15.0.6, llvmorg-15.0.5, llvmorg-15.0.4, llvmorg-15.0.3, llvmorg-15.0.2, llvmorg-15.0.1, llvmorg-15.0.0, llvmorg-15.0.0-rc3, llvmorg-15.0.0-rc2, llvmorg-15.0.0-rc1, llvmorg-16-init, llvmorg-14.0.6, llvmorg-14.0.5, llvmorg-14.0.4 |
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| #
bc78c099 |
| 04-May-2022 |
Jon Chesterfield <[email protected]> |
[amdgpu] Elide module lds allocation in kernels with no callees
Introduces a string attribute, amdgpu-requires-module-lds, to allow
eliding the module.lds block from kernels. Will allocate the block
[amdgpu] Elide module lds allocation in kernels with no callees
Introduces a string attribute, amdgpu-requires-module-lds, to allow
eliding the module.lds block from kernels. Will allocate the block as before
if the attribute is missing or has its default value of true.
Patch uses the new attribute to detect the simplest possible instance of this,
where a kernel makes no calls and thus cannot call any functions that use LDS.
Tests updated to match, coverage was already good. Interesting cases is in
lower-module-lds-offsets where annotating the kernel allows the backend to pick
a different (in this case better) variable ordering than previously. A later
patch will avoid moving kernel variables into module.lds when the kernel can
have this attribute, allowing optimal ordering and locally unused variable
elimination.
Reviewed By: arsenm
Differential Revision: https://reviews.llvm.org/D122091
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Revision tags: llvmorg-14.0.3, llvmorg-14.0.2, llvmorg-14.0.1, llvmorg-14.0.0, llvmorg-14.0.0-rc4, llvmorg-14.0.0-rc3, llvmorg-14.0.0-rc2, llvmorg-14.0.0-rc1, llvmorg-15-init, llvmorg-13.0.1, llvmorg-13.0.1-rc3, llvmorg-13.0.1-rc2, llvmorg-13.0.1-rc1, llvmorg-13.0.0, llvmorg-13.0.0-rc4, llvmorg-13.0.0-rc3, llvmorg-13.0.0-rc2, llvmorg-13.0.0-rc1, llvmorg-14-init, llvmorg-12.0.1, llvmorg-12.0.1-rc4, llvmorg-12.0.1-rc3, llvmorg-12.0.1-rc2 |
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| #
d797a7f8 |
| 15-Jun-2021 |
Stanislav Mekhanoshin <[email protected]> |
[AMDGPU] Use performOptimizedStructLayout for LDS sort
This gives better packing.
Differential Revision: https://reviews.llvm.org/D104331
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| #
05289dfb |
| 07-Jun-2021 |
Stanislav Mekhanoshin <[email protected]> |
[AMDGPU] Handle constant LDS uses from different kernels
This allows to lower an LDS variable into a kernel structure
even if there is a constant expression used from different
kernels.
Differentia
[AMDGPU] Handle constant LDS uses from different kernels
This allows to lower an LDS variable into a kernel structure
even if there is a constant expression used from different
kernels.
Differential Revision: https://reviews.llvm.org/D103655
show more ...
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Revision tags: llvmorg-12.0.1-rc1 |
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| #
8de4db69 |
| 19-May-2021 |
Stanislav Mekhanoshin <[email protected]> |
[AMDGPU] Lower kernel LDS into a sorted structure
Differential Revision: https://reviews.llvm.org/D102954
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| #
748db5bf |
| 20-May-2021 |
Stanislav Mekhanoshin <[email protected]> |
[AMDGPU] Fix module LDS selection
Accesses to global module LDS variable start from null,
but kernel also thinks its variables start address is
null. Fixed by not using a null as an address.
Differ
[AMDGPU] Fix module LDS selection
Accesses to global module LDS variable start from null,
but kernel also thinks its variables start address is
null. Fixed by not using a null as an address.
Differential Revision: https://reviews.llvm.org/D102882
show more ...
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Revision tags: llvmorg-12.0.0, llvmorg-12.0.0-rc5, llvmorg-12.0.0-rc4 |
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| #
13e49dce |
| 15-Mar-2021 |
Jon Chesterfield <[email protected]> |
[amdgpu] Implement lower function LDS pass
[amdgpu] Implement lower function LDS pass
Local variables are allocated at kernel launch. This pass collects global
variables that are used from non-kern
[amdgpu] Implement lower function LDS pass
[amdgpu] Implement lower function LDS pass
Local variables are allocated at kernel launch. This pass collects global
variables that are used from non-kernel functions, moves them into a new struct
type, and allocates an instance of that type in every kernel. Uses are then
replaced with a constantexpr offset.
Prior to this pass, accesses from a function are compiled to trap. With this
pass, most such accesses are removed before reaching codegen. The trap logic
is left unchanged by this pass. It is still reachable for the cases this pass
misses, notably the extern shared construct from hip and variables marked
constant which survive the optimizer.
This is of interest to the openmp project because the deviceRTL runtime library
uses cuda shared variables from functions that cannot be inlined. Trunk llvm
therefore cannot compile some openmp kernels for amdgpu. In addition to the
unit tests attached, this patch applied to ROCm llvm with fixed-abi enabled
and the function pointer hashing scheme deleted passes the openmp suite.
This lowering will use more LDS than strictly necessary. It is intended to be
a functionally correct fallback for cases that are difficult to target from
future optimisation passes.
Reviewed By: arsenm
Differential Revision: https://reviews.llvm.org/D94648
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