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| author | Sanjoy Das <sanjoy@playingwithpointers.com> | 2016-08-13 00:58:31 +0000 |
|---|---|---|
| committer | Sanjoy Das <sanjoy@playingwithpointers.com> | 2016-08-13 00:58:31 +0000 |
| commit | 3502511548d86dfb09256f0f19d370be71812a62 (patch) | |
| tree | 443189e6cf9bc4ce437b322f3ee94802d2ec6a33 /clang/lib/Basic/FileManager.cpp | |
| parent | 3e3a057c20d15ac9c88c96cea806fb780b59b93a (diff) | |
| download | llvm-3502511548d86dfb09256f0f19d370be71812a62.zip llvm-3502511548d86dfb09256f0f19d370be71812a62.tar.gz llvm-3502511548d86dfb09256f0f19d370be71812a62.tar.bz2 | |
[IndVars] Ignore (s|z)exts that don't extend the induction variable
`IVVisitor::visitCast` used to have the invariant that if the
instruction it was passed was a sext or zext instruction, the result of
the instruction would be wider than the induction variable. This is no
longer true after rL275037, so this change teaches `IndVarSimplify` s
implementation of `IVVisitor::visitCast` to work with the relaxed
invariant.
A corresponding change to SimplifyIndVar to preserve the said invariant
after rL275037 would also work, but given how `IVVisitor::visitCast` is
spelled (no indication of said invariant), I figured the current fix is
cleaner.
Fixes PR28935.
llvm-svn: 278584
Diffstat (limited to 'clang/lib/Basic/FileManager.cpp')
0 files changed, 0 insertions, 0 deletions