diff options
Diffstat (limited to 'llvm/lib/Transforms/Utils/SimplifyCFG.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Utils/SimplifyCFG.cpp | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp index 8784b970214..6c9c44b1663 100644 --- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp +++ b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp @@ -5151,8 +5151,11 @@ static bool SwitchToLookupTable(SwitchInst *SI, IRBuilder<> &Builder, const TargetTransformInfo &TTI) { assert(SI->getNumCases() > 1 && "Degenerate switch?"); - // Only build lookup table when we have a target that supports it. - if (!TTI.shouldBuildLookupTables()) + Function *Fn = SI->getParent()->getParent(); + // Only build lookup table when we have a target that supports it or the + // attribute is not set. + if (!TTI.shouldBuildLookupTables() || + (Fn->getFnAttribute("no-jump-tables").getValueAsString() == "true")) return false; // FIXME: If the switch is too sparse for a lookup table, perhaps we could @@ -5333,7 +5336,7 @@ static bool SwitchToLookupTable(SwitchInst *SI, IRBuilder<> &Builder, // If using a bitmask, use any value to fill the lookup table holes. Constant *DV = NeedMask ? ResultLists[PHI][0].second : DefaultResults[PHI]; - StringRef FuncName = SI->getParent()->getParent()->getName(); + StringRef FuncName = Fn->getName(); SwitchLookupTable Table(Mod, TableSize, MinCaseVal, ResultList, DV, DL, FuncName); |
