diff options
| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-10-08 22:06:44 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-10-08 22:06:44 +0000 |
| commit | 6be75ae196e0138048f685d4df7128d24245be5e (patch) | |
| tree | e83ffed484c84711fe9a76908f8969ec8e5e8470 /lib/Analysis | |
| parent | 8e635dbc78996bc18cf13b4806706cf3529ea646 (diff) | |
| download | llvm-6be75ae196e0138048f685d4df7128d24245be5e.tar.gz llvm-6be75ae196e0138048f685d4df7128d24245be5e.tar.bz2 llvm-6be75ae196e0138048f685d4df7128d24245be5e.tar.xz | |
Don't crash on extra evil irreducible control flow.
When the CFG contains a loop with multiple entry blocks, the traces
computed by MachineTraceMetrics don't always have the same nice
properties. Loop back-edges are normally excluded from traces, but
MachineLoopInfo doesn't recognize loops with multiple entry blocks, so
those back-edges may be included.
Avoid asserting when that happens by adding an isEarlierInSameTrace()
function that accurately determines if a dominating block is part of the
same trace AND is above the currrent block in the trace.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165434 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis')
0 files changed, 0 insertions, 0 deletions