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| author | Philip Reames <listmail@philipreames.com> | 2019-01-24 16:08:18 +0000 |
|---|---|---|
| committer | Philip Reames <listmail@philipreames.com> | 2019-01-24 16:08:18 +0000 |
| commit | a657510eb7492896589c97065e2ef3c770742a78 (patch) | |
| tree | 57f199cee86f978cab12624c7de018ccbe364264 /llvm/lib/CodeGen/MachineModuleInfo.cpp | |
| parent | f7098b3a041eaa8e6af607cc298036924ec512ee (diff) | |
| download | llvm-a657510eb7492896589c97065e2ef3c770742a78.zip llvm-a657510eb7492896589c97065e2ef3c770742a78.tar.gz llvm-a657510eb7492896589c97065e2ef3c770742a78.tar.bz2 | |
[RS4GC] Avoid crashing on gep scalar_base, vector_idx
This is an alternative to https://reviews.llvm.org/D57103. After discussion, we dedicided to check this in as a temporary workaround, and pursue a true fix under the original thread.
The issue at hand is that the base rewriting algorithm doesn't consider the fact that GEPs can turn a scalar input into a vector of outputs. We had handling for scalar GEPs and fully vector GEPs (i.e. all vector operands), but not the scalar-base + vector-index forms. A true fix here requires treating GEP analogously to extractelement or shufflevector.
This patch is merely a workaround. It simply hides the crash at the cost of some ugly code gen for this presumable very rare pattern.
Differential Revision: https://reviews.llvm.org/D57138
llvm-svn: 352059
Diffstat (limited to 'llvm/lib/CodeGen/MachineModuleInfo.cpp')
0 files changed, 0 insertions, 0 deletions