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| author | Ulrich Weigand <ulrich.weigand@de.ibm.com> | 2018-01-22 15:41:49 +0000 |
|---|---|---|
| committer | Ulrich Weigand <ulrich.weigand@de.ibm.com> | 2018-01-22 15:41:49 +0000 |
| commit | 145d63f1ada934f82af0c0796d3ba21461270e47 (patch) | |
| tree | c96104aacb2d9b83f33b161b0cee2bab0bb95fcf /llvm/test/CodeGen/XCore | |
| parent | 811523cc08b5b17768ff9427691dfb70a068dbbf (diff) | |
| download | bcm5719-llvm-145d63f1ada934f82af0c0796d3ba21461270e47.tar.gz bcm5719-llvm-145d63f1ada934f82af0c0796d3ba21461270e47.zip | |
[SystemZ] Fix bootstrap failure due to invalid DAG loop
The change in r322988 caused a failure in the bootstrap build bot.
The problem was that directly gluing a BR_CCMASK node to a
compare-and-swap could lead to issues if other nodes were
chained in between. There is then no way to create a topological
sort that respects both the chain sequence and the glue property.
Fixed for now by rejecting the optimization in this case. As a
future enhancement, we may be able to handle additional cases
by swapping chain links around.
llvm-svn: 323129
Diffstat (limited to 'llvm/test/CodeGen/XCore')
0 files changed, 0 insertions, 0 deletions
