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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 | 5858e091a6efc0764db41e8dea81e62b185b7a77 (patch) | |
| tree | 996c5f6230163426fc2861ddb66555ae219e3269 /llvm/lib/CodeGen/UnreachableBlockElim.cpp | |
| parent | c052ba7ff36aea46309986cdc90a04072c087f01 (diff) | |
| download | bcm5719-llvm-5858e091a6efc0764db41e8dea81e62b185b7a77.tar.gz bcm5719-llvm-5858e091a6efc0764db41e8dea81e62b185b7a77.zip | |
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.
llvm-svn: 122950
Diffstat (limited to 'llvm/lib/CodeGen/UnreachableBlockElim.cpp')
0 files changed, 0 insertions, 0 deletions
