diff options
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp index 9e12a272ad6..cbb1762e26b 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp @@ -718,12 +718,27 @@ void SelectionDAGISel::SelectAllBasicBlocks(Function &Fn, MachineFunction &MF, BasicBlock::iterator BI = Begin; // Lower any arguments needed in this block if this is the entry block. - if (LLVMBB == &Fn.getEntryBlock()) + bool SuppressFastISel = false; + if (LLVMBB == &Fn.getEntryBlock()) { LowerArguments(LLVMBB); + // If any of the arguments has the byval attribute, forgo + // fast-isel in the entry block. + if (EnableFastISel) { + unsigned j = 1; + for (Function::arg_iterator I = Fn.arg_begin(), E = Fn.arg_end(); + I != E; ++I, ++j) + if (Fn.paramHasAttr(j, ParamAttr::ByVal)) { + cerr << "FastISel skips entry block due to byval argument"; + SuppressFastISel = true; + break; + } + } + } + // Before doing SelectionDAG ISel, see if FastISel has been requested. // FastISel doesn't support EH landing pads, which require special handling. - if (EnableFastISel && !BB->isLandingPad()) { + if (EnableFastISel && !SuppressFastISel && !BB->isLandingPad()) { if (FastISel *F = TLI.createFastISel(*FuncInfo->MF, MMI, FuncInfo->ValueMap, FuncInfo->MBBMap, @@ -761,6 +776,9 @@ void SelectionDAGISel::SelectAllBasicBlocks(Function &Fn, MachineFunction &MF, // Then handle certain instructions as single-LLVM-Instruction blocks. if (isa<CallInst>(BI)) { + cerr << "FastISel missed call: "; + BI->dump(); + if (BI->getType() != Type::VoidTy) { unsigned &R = FuncInfo->ValueMap[BI]; if (!R) |
