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| author | Craig Topper <craig.topper@intel.com> | 2017-11-10 22:50:50 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@intel.com> | 2017-11-10 22:50:50 +0000 |
| commit | ffd48e3c27b2dc92629acb27d1cd5beb57b4cfbf (patch) | |
| tree | f1421246407fd4cd245a533696f09f848652a22f /clang/lib/Serialization/ModuleManager.cpp | |
| parent | 8c6917872c527efff391cc4e1861769764a38a19 (diff) | |
| download | llvm-ffd48e3c27b2dc92629acb27d1cd5beb57b4cfbf.zip llvm-ffd48e3c27b2dc92629acb27d1cd5beb57b4cfbf.tar.gz llvm-ffd48e3c27b2dc92629acb27d1cd5beb57b4cfbf.tar.bz2 | |
[SelectionDAG] Teach SelectionDAGBuilder's getUniformBase for gather/scatter handling to accept GEPs with more than 2 operands if the middle operands are all 0s
Currently we can only get a uniform base from a simple GEP with 2 operands. This causes us to miss address folding opportunities for simple global array accesses as the test case shows.
This patch adds support for larger GEPs if the other indices are 0 since those don't require any additional computations to be inserted.
We may also want to handle constant splats of zero here, but I'm leaving that for future work when I have a real world example.
Differential Revision: https://reviews.llvm.org/D39911
llvm-svn: 317947
Diffstat (limited to 'clang/lib/Serialization/ModuleManager.cpp')
0 files changed, 0 insertions, 0 deletions