diff options
Diffstat (limited to 'lib/Transforms/Utils/SimplifyCFG.cpp')
| -rw-r--r-- | lib/Transforms/Utils/SimplifyCFG.cpp | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/lib/Transforms/Utils/SimplifyCFG.cpp b/lib/Transforms/Utils/SimplifyCFG.cpp index 90f8847bc1..a30dcf2fe0 100644 --- a/lib/Transforms/Utils/SimplifyCFG.cpp +++ b/lib/Transforms/Utils/SimplifyCFG.cpp @@ -3684,11 +3684,9 @@ static bool SwitchToLookupTable(SwitchInst *SI, // GEP needs a runtime relocation in PIC code. We should just build one big // string and lookup indices into that. - // Ignore the switch if the number of cases is too small. - // This is similar to the check when building jump tables in - // SelectionDAGBuilder::handleJTSwitchCase. - // FIXME: Determine the best cut-off. - if (SI->getNumCases() < 4) + // Ignore switches with less than three cases. Lookup tables will not make them + // faster, so we don't analyze them. + if (SI->getNumCases() < 3) return false; // Figure out the corresponding result for each case value and phi node in the |