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| author | Hal Finkel <hfinkel@anl.gov> | 2013-10-04 23:41:05 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2013-10-04 23:41:05 +0000 |
| commit | f5a3eaea55b32a6f475870aaa18f2f95c3b37a40 (patch) | |
| tree | ec3deedfa9af3b0b7a6583779f91e93c4aca634c /llvm/lib/CodeGen | |
| parent | 41369b5f416f393b5869a19cb0629b6d6e97417d (diff) | |
| download | bcm5719-llvm-f5a3eaea55b32a6f475870aaa18f2f95c3b37a40.tar.gz bcm5719-llvm-f5a3eaea55b32a6f475870aaa18f2f95c3b37a40.zip | |
UpdatePHINodes in BasicBlockUtils should not crash on duplicate predecessors
UpdatePHINodes has an optimization to reuse an existing PHI node, where it
first deletes all of its entries and then replaces them. Unfortunately, in the
case where we had duplicate predecessors (which are allowed so long as the
associated PHI entries have the same value), the loop removing the existing PHI
entries from the to-be-reused PHI would assert (if that PHI was not the one
which had the duplicates).
llvm-svn: 192001
Diffstat (limited to 'llvm/lib/CodeGen')
0 files changed, 0 insertions, 0 deletions
