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| author | Chris Lattner <sabre@nondot.org> | 2011-01-06 06:19:46 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2011-01-06 06:19:46 +0000 |
| commit | 8cd4efb6a5e51b4e77039c17338f290ca3a8ee92 (patch) | |
| tree | ae17d657a282344d56741b227bebecd9246785e7 /lib/CodeGen/SelectionDAG/SelectionDAG.cpp | |
| parent | 255874ff521bb81b294ec861a5d9a99d8198448c (diff) | |
implement constant folding support for an exotic constant expr:
ret i64 ptrtoint (i8* getelementptr ([1000 x i8]* @X, i64 1, i64 sub (i64 0, i64 ptrtoint ([1000 x i8]* @X to i64))) to i64)
to "ret i64 1000". This allows us to correctly compute the trip count
on a loop in PR8883, which occurs with std::fill on a char array. This
allows us to transform it into a memset with a constant size.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122950 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/SelectionDAG.cpp')
0 files changed, 0 insertions, 0 deletions