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| author | Yonghong Song <yhs@fb.com> | 2020-12-01 19:26:39 -0800 |
|---|---|---|
| committer | Yonghong Song <yhs@fb.com> | 2020-12-02 22:27:17 -0800 |
| commit | 61a06c071dd16a9725d3b7bfac806520dc1b95aa (patch) | |
| tree | 941b66ba17d2d2a40740d798182d48309a8e652a /clang/lib/Frontend/CompilerInvocation.cpp | |
| parent | c1ba991e8dd69b17fd2d88be5f6cf2b23d382c6c (diff) | |
| download | llvm-61a06c071dd16a9725d3b7bfac806520dc1b95aa.zip llvm-61a06c071dd16a9725d3b7bfac806520dc1b95aa.tar.gz llvm-61a06c071dd16a9725d3b7bfac806520dc1b95aa.tar.bz2 | |
BPF: add a test for selectiondag alias analysis w.r.t. lifetime
This adds a test for the bug
https://bugs.llvm.org/show_bug.cgi?id=47591
Previously, selection dag has a bug which may incorrectly
assume no alias when crossing a lifetime boundary and this
may generate incorrect code as demonstrated in the above bug.
It looks the bug is fixed by https://reviews.llvm.org/D91833.
Basically, when comparing two potential memory access dag nodes,
a store and a lifetime.start,
with the same frame index.
Previously, it may be decided no alias. With the above fix,
these two will be considered aliasing which will prevent
incorrect code scheduling.
Differential Revision: https://reviews.llvm.org/D92451
Diffstat (limited to 'clang/lib/Frontend/CompilerInvocation.cpp')
0 files changed, 0 insertions, 0 deletions