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author | Changpeng Fang <changpeng.fang@gmail.com> | 2019-01-15 23:12:36 +0000 |
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committer | Changpeng Fang <changpeng.fang@gmail.com> | 2019-01-15 23:12:36 +0000 |
commit | b224940c170e81e7835eda9bd500c88d04dbb343 (patch) | |
tree | 5024272341b430bab376fad430f0e1595e247a90 /klee/docs/doxygen.cfg.in | |
parent | 36f19cd8a562179f03e12859a792ff956f2fc637 (diff) |
AMDGPU: Raise the priority of MAD24 in instruction selection.linaro-local/ci/tcwg_kernel/llvm-master-arm-lts-allmodconfig
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
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