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| author | Andrew Trick <atrick@apple.com> | 2011-09-10 01:24:17 +0000 |
|---|---|---|
| committer | Andrew Trick <atrick@apple.com> | 2011-09-10 01:24:17 +0000 |
| commit | 20151da8c38287b9fa181e9fef93f70bc2cd9fd2 (patch) | |
| tree | 83d9084415a4760b639928fe3958067ee2c55d3a /docs/ProgrammersManual.html | |
| parent | 543376743c900806109c75d4fd12c4ba01020cfe (diff) | |
[disable-iv-rewrite] Allow WidenIV to handle NSW/NUW operations
better.
Don't immediately give up when an add operation can't be trivially
sign/zero-extended within a loop. If it has NSW/NUW flags, generate a
new expression with sign extended (non-recurrent) operand. As before,
if SCEV says that all sign extends are loop invariant, then we can
widen the operation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139453 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs/ProgrammersManual.html')
0 files changed, 0 insertions, 0 deletions