llvm /
llvm /
844041aadf0bfc980baf6ba98eeafc2b903ac583 AMDGPU: Raise the priority of MAD24 in instruction selection.
Summary:
We have seen performance regression when v_add3 is generated. The major reason is that the v_mad pattern
is broken when v_add3 is generated. We also see the register pressure increased. While we could not properly
estimate register pressure during instruction selection, we can give mad a higher priority.
In this work, we raise the priority for mad24 in selection and resolve the performance regression.
Reviewers:
rampitec
Differential Revision:
https://reviews.llvm.org/D56745
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351273 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed
