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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-08-10 22:27:31 +0000 |
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| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-08-10 22:27:31 +0000 |
| commit | eb74c08192d9c9425b2d8cf08852e9e787a87881 (patch) | |
| tree | e5007e103e21049e14735964ea7fb9618fd2dd68 /test/CodeGen | |
| parent | a35bf506f41f4231dc649f3af5255e0b1087b2e3 (diff) | |
| download | external_llvm-eb74c08192d9c9425b2d8cf08852e9e787a87881.zip external_llvm-eb74c08192d9c9425b2d8cf08852e9e787a87881.tar.gz external_llvm-eb74c08192d9c9425b2d8cf08852e9e787a87881.tar.bz2 | |
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
Diffstat (limited to 'test/CodeGen')
0 files changed, 0 insertions, 0 deletions