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| author | Francesco Petrogalli <francesco.petrogalli@arm.com> | 2020-04-17 19:05:31 +0100 |
|---|---|---|
| committer | Francesco Petrogalli <francesco.petrogalli@arm.com> | 2020-04-17 19:23:28 +0100 |
| commit | 48879c02bfc40017ec7d4dcfbd920ef949b53cf6 (patch) | |
| tree | 397e25feba34fcbea4cc4e5650d9809dc4d73191 /llvm/lib/CodeGen/MachineStripDebug.cpp | |
| parent | 681466f5e6412350a0b066791450e72325c2c074 (diff) | |
| download | llvm-48879c02bfc40017ec7d4dcfbd920ef949b53cf6.zip llvm-48879c02bfc40017ec7d4dcfbd920ef949b53cf6.tar.gz llvm-48879c02bfc40017ec7d4dcfbd920ef949b53cf6.tar.bz2 | |
[llvm][CodeGen] Fix issue for SVE gather prefetch.
Summary:
This change is fixing an issue where the dagcombine incorrectly used an addressing mode with scaled offsets (indices), instead of unscaled offsets.
Those addressing modes do not exist for `prfh` , `prfw` and `prfd`, hence we can reuse `prfb` because that has unscaled offsets, and because the pseudo-code in the XML spec suggests that the element size is not used for the amount of data that is prefetched by the instruction.
FWIW, GCC also emits a `prfb` for these cases.
Reviewers: sdesmalen, andwar, rengolin
Reviewed By: sdesmalen
Subscribers: tschuett, hiraditya, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D78069
Diffstat (limited to 'llvm/lib/CodeGen/MachineStripDebug.cpp')
0 files changed, 0 insertions, 0 deletions