| commit | eb74c08192d9c9425b2d8cf08852e9e787a87881 | [log] [tgz] |
|---|---|---|
| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | Fri Aug 10 22:27:31 2012 +0000 |
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | Fri Aug 10 22:27:31 2012 +0000 |
| tree | e5007e103e21049e14735964ea7fb9618fd2dd68 | |
| parent | a35bf506f41f4231dc649f3af5255e0b1087b2e3 [diff] |
Add a proper if-conversion cost model. Detect when there is not enough available ILP, so if-conversion can't speculate instructions for free. Compute the lengthening of the critical path when inserting a select instruction that depends on the condition as well as both sides of the if. Reject conversions that would stretch the critical path by more than half a mispredict penalty. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161713 91177308-0d34-0410-b5e6-96231b3b80d8