|
Revision tags: llvmorg-21-init |
|
| #
11b04019 |
| 24-Jan-2025 |
Aaditya <115080342+easyonaadit@users.noreply.github.com> |
[AMDGPU] Restore SP from saved-FP or saved-BP (#124007)
Currently, the AMDGPU backend bumps the Stack Pointer
by fixed size offsets in the prolog of device functions, and
restores it by the same
[AMDGPU] Restore SP from saved-FP or saved-BP (#124007)
Currently, the AMDGPU backend bumps the Stack Pointer
by fixed size offsets in the prolog of device functions, and
restores it by the same amount in the epilog.
Prolog:
sp += frameSize
Epilog:
sp -= frameSize
If a function has dynamic stack realignment,
Prolog:
sp += frameSize + max_alignment
Epilog:
sp -= frameSize + max_alignment
These calculations are not optimal in case of dynamic
stack realignment, and completely fail in case of
dynamic stack readjustment.
This patch uses the saved Frame Pointer to restore SP.
Prolog:
fp = sp
sp += frameSize
Epilog:
sp = fp
In case of dynamic stack realignment, SP is restored from
the saved Base Pointer.
Prolog:
fp = sp + (max_alignment - 1)
fp = fp & (-max_alignment)
bp = sp
sp += frameSize + max_alignment
Epilog:
sp = bp
(Note: The presence of BP has been enforced in case of any
dynamic stack realignment.)
---------
Co-authored-by: Pravin Jagtap <Pravin.Jagtap@amd.com>
Co-authored-by: Matt Arsenault <arsenm2@gmail.com>
show more ...
|
|
Revision tags: llvmorg-19.1.7, llvmorg-19.1.6, llvmorg-19.1.5 |
|
| #
5a3299a6 |
| 26-Nov-2024 |
Matt Arsenault <Matthew.Arsenault@amd.com> |
AMDGPU: Remove some -verify-machineinstrs from tests (#117736)
We should leave these for EXPENSIVE_CHECKS builds. Some of these
were near the top of slowest tests.
|
|
Revision tags: 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 |
|
| #
6dc8c2da |
| 16-Jul-2024 |
Joseph Huber <huberjn@outlook.com> |
[AMDGPU] Fix resource analysis crash on alias-to-alias function (#99034)
Summary:
Previously this code only looked through a single level of aliases to
find the underlying function. This patch chang
[AMDGPU] Fix resource analysis crash on alias-to-alias function (#99034)
Summary:
Previously this code only looked through a single level of aliases to
find the underlying function. This patch changes it to continue until it
finds the end. Aliases that form a cycle are illegal IR, so we shouldn't
need to worry about infinite loops.
Fixes https://github.com/llvm/llvm-project/issues/96812
show more ...
|