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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-07-04 00:09:54 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-07-04 00:09:54 +0000 |
| commit | 33242fd3ed5586091e73254b58dd1825e9d53c60 (patch) | |
| tree | 1cd48f1af6b26d35653abd52edd3df39f303773d /include/llvm/InitializePasses.h | |
| parent | 0fd518beb38568e58eeec86876bb597bab06b722 (diff) | |
| download | llvm-33242fd3ed5586091e73254b58dd1825e9d53c60.tar.gz llvm-33242fd3ed5586091e73254b58dd1825e9d53c60.tar.bz2 llvm-33242fd3ed5586091e73254b58dd1825e9d53c60.tar.xz | |
Add an experimental early if-conversion pass, off by default.
This pass performs if-conversion on SSA form machine code by
speculatively executing both sides of the branch and using a cmov
instruction to select the result. This can help lower the number of
branch mispredictions on architectures like x86 that don't have
predicable instructions.
The current implementation is very aggressive, and causes regressions on
mosts tests. It needs good heuristics that have yet to be implemented.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159694 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/InitializePasses.h')
| -rw-r--r-- | include/llvm/InitializePasses.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/llvm/InitializePasses.h b/include/llvm/InitializePasses.h index c2cb7c218b..e6fa8c3d30 100644 --- a/include/llvm/InitializePasses.h +++ b/include/llvm/InitializePasses.h @@ -100,6 +100,7 @@ void initializeDomPrinterPass(PassRegistry&); void initializeDomViewerPass(PassRegistry&); void initializeDominanceFrontierPass(PassRegistry&); void initializeDominatorTreePass(PassRegistry&); +void initializeEarlyIfConverterPass(PassRegistry&); void initializeEdgeBundlesPass(PassRegistry&); void initializeEdgeProfilerPass(PassRegistry&); void initializeExpandPostRAPass(PassRegistry&); |