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| author | Nikita Popov <nikita.ppv@gmail.com> | 2020-03-07 20:21:09 +0100 |
|---|---|---|
| committer | Nikita Popov <nikita.ppv@gmail.com> | 2020-03-09 18:47:46 +0100 |
| commit | c3ca6876ed0cf833dfde681e18c37ed288bb554c (patch) | |
| tree | f8ce13fffa692fd5329a3eb69c74fa59feb06d59 /clang | |
| parent | 829d377a98fd3ee087935ea215677e49c8b51b27 (diff) | |
| download | llvm-c3ca6876ed0cf833dfde681e18c37ed288bb554c.zip llvm-c3ca6876ed0cf833dfde681e18c37ed288bb554c.tar.gz llvm-c3ca6876ed0cf833dfde681e18c37ed288bb554c.tar.bz2 | |
[InstCombine] Don't simplify calls without uses
When simplifying a call without uses, replaceInstUsesWith() is
going to do nothing, but we'll skip all following folds. We can
only run into this problem with calls that both simplify and are
not trivially dead if unused, which currently seems to happen only
with calls to undef, as the test diff shows. When extending
SimplifyCall() to handle "returned" attributes, this becomes a much
bigger problem, so I'm fixing this first.
Differential Revision: https://reviews.llvm.org/D75814
Diffstat (limited to 'clang')
0 files changed, 0 insertions, 0 deletions