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| author | Dan Gohman <gohman@apple.com> | 2008-07-21 21:45:02 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2008-07-21 21:45:02 +0000 |
| commit | 7ad3cd8c9db6edfd9dbbd31fabe793c4032e5f31 (patch) | |
| tree | acd86c1dc435b2ea91bd43aa578f36bd295e4b09 /llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | |
| parent | 7ed03c4cdd58ef60896d3ce0cdc766185daff02b (diff) | |
| download | bcm5719-llvm-7ad3cd8c9db6edfd9dbbd31fabe793c4032e5f31.tar.gz bcm5719-llvm-7ad3cd8c9db6edfd9dbbd31fabe793c4032e5f31.zip | |
Fix a bug in LSR's dead-PHI cleanup. If a PHI has a def-use chain that
leads into a cycle involving a different PHI, LSR got stuck running
around that cycle looking for the original PHI. To avoid this, keep
track of visited PHIs and stop searching if we see one more than once.
This fixes PR2570.
llvm-svn: 53879
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp')
0 files changed, 0 insertions, 0 deletions
