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| author | Chris Lattner <sabre@nondot.org> | 2009-06-16 05:15:21 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2009-06-16 05:15:21 +0000 |
| commit | 714fa95d01ce1a646b52bc529f3dbcf6a06fa29b (patch) | |
| tree | db917949ab045fa1f52f85561d39c97e04c4bb1c /lib/CodeGen/PHIElimination.cpp | |
| parent | fe7f294d5cb42bcb98f4d23b26e83b361175df38 (diff) | |
Fix PR4336: Iterating over use-def chains doesn't seem to be deterministic.
The problem was that BitcodeReader::materializeModule would read functions
from the bc file in densemap pointer key order (doubly non-deterministic!),
which would cause the use-def chains to be set up for globals in
non-determinstic order. Non-determinstic use/def chains can cause
nondeterminism in many places down-stream.
Many thanks to Julien Lerouge for putting together the pass in the PR that
shows the issue!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73470 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/PHIElimination.cpp')
0 files changed, 0 insertions, 0 deletions