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| author | Wei Mi <wmi@google.com> | 2019-07-31 19:59:24 +0000 |
|---|---|---|
| committer | Wei Mi <wmi@google.com> | 2019-07-31 19:59:24 +0000 |
| commit | f49c107f06c6a98d11a09d758f08554c78b9b933 (patch) | |
| tree | 80eafd9238594d0eb67f5c4f09c482b96bf8c988 /llvm/lib/CodeGen/MachineOperand.cpp | |
| parent | c940adeddb86dfccfcbb2eb3fedd0deb0b3640e1 (diff) | |
| download | llvm-f49c107f06c6a98d11a09d758f08554c78b9b933.zip llvm-f49c107f06c6a98d11a09d758f08554c78b9b933.tar.gz llvm-f49c107f06c6a98d11a09d758f08554c78b9b933.tar.bz2 | |
[DAGCombine] Limit the number of times for the same store and root nodes
to bail out in store merging dependence check.
We run into a case where dependence check in store merging bail out many times
for the same store and root nodes in a huge basicblock. That increases compile
time by almost 100x. The patch add a map to track how many times the bailing
out happen for the same store and root, and if it is over a limit, stop
considering the store with the same root as a merging candidate.
Differential Revision: https://reviews.llvm.org/D65174
llvm-svn: 367472
Diffstat (limited to 'llvm/lib/CodeGen/MachineOperand.cpp')
0 files changed, 0 insertions, 0 deletions