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| author | Bradley Smith <bradley.smith@arm.com> | 2021-06-29 12:40:46 +0100 |
|---|---|---|
| committer | Bradley Smith <bradley.smith@arm.com> | 2021-07-01 17:05:53 +0100 |
| commit | 2668727929e497553eba485876eb6190d38cc367 (patch) | |
| tree | 1be01e11e99b6202bef6811a6465b2331c43cbff /lldb/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.cpp | |
| parent | 661577e698645d0645a5639ec180f0e3c83af021 (diff) | |
[SelectionDAG] Implement PromoteIntRes_INSERT_SUBVECTOR
Inserting into a smaller-than-legal scalable vector would result in an
internal compiler error. For example, inserting a <vscale x 4 x i8> into
a <vscale x 8 x i8> (both illegal vector types for SVE) would cause a
crash.
This crash was happening because there was no code to promote (legalise)
the result of an INSERT_SUBVECTOR node.
This patch implements PromoteIntRes_INSERT_SUBVECTOR, which legalises
the ISD node. This is currently done by going through memory. This is
necessary because of the requirement that the SubVec parameter of the
INSERT_SUBVECTOR node must be smaller than the Vec parameter, which
means that INSERT_SUBVECTOR cannot always have a legal result/operand
types.
Co-Authored-by: Joe Ellis <joe.ellis@arm.com>
Differential Revision: https://reviews.llvm.org/D102766
Diffstat (limited to 'lldb/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.cpp')
0 files changed, 0 insertions, 0 deletions