diff options
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp index e088845daa..d2cde34896 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp @@ -140,6 +140,15 @@ FunctionLoweringInfo::FunctionLoweringInfo(TargetLowering &tli, const Type *Ty = AI->getAllocatedType(); uint64_t TySize = TLI.getTargetData().getTypeSize(Ty); unsigned Align = TLI.getTargetData().getTypeAlignment(Ty); + + // If the alignment of the value is smaller than the size of the value, + // and if the size of the value is particularly small (<= 8 bytes), + // round up to the size of the value for potentially better performance. + // + // FIXME: This could be made better with a preferred alignment hook in + // TargetData. It serves primarily to 8-byte align doubles for X86. + if (Align < TySize && TySize <= 8) Align = TySize; + TySize *= CUI->getValue(); // Get total allocated size. StaticAllocaMap[AI] = MF.getFrameInfo()->CreateStackObject((unsigned)TySize, Align); |