diff options
Diffstat (limited to 'clang/lib')
| -rw-r--r-- | clang/lib/CodeGen/CGBuiltin.cpp | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp index 6d3519ab78c..40b0a9c4180 100644 --- a/clang/lib/CodeGen/CGBuiltin.cpp +++ b/clang/lib/CodeGen/CGBuiltin.cpp @@ -6524,29 +6524,27 @@ Value *CodeGenFunction::EmitX86BuiltinExpr(unsigned BuiltinID, unsigned NumElts = cast<llvm::VectorType>(Ops[0]->getType())->getNumElements(); assert(NumElts % 16 == 0); - unsigned NumLanes = NumElts / 16; - unsigned NumLaneElts = NumElts / NumLanes; // If palignr is shifting the pair of vectors more than the size of two // lanes, emit zero. - if (ShiftVal >= (2 * NumLaneElts)) + if (ShiftVal >= 32) return llvm::Constant::getNullValue(ConvertType(E->getType())); // If palignr is shifting the pair of input vectors more than one lane, // but less than two lanes, convert to shifting in zeroes. - if (ShiftVal > NumLaneElts) { - ShiftVal -= NumLaneElts; + if (ShiftVal > 16) { + ShiftVal -= 16; Ops[1] = Ops[0]; Ops[0] = llvm::Constant::getNullValue(Ops[0]->getType()); } int Indices[32]; // 256-bit palignr operates on 128-bit lanes so we need to handle that - for (unsigned l = 0; l != NumElts; l += NumLaneElts) { - for (unsigned i = 0; i != NumLaneElts; ++i) { + for (unsigned l = 0; l != NumElts; l += 16) { + for (unsigned i = 0; i != 16; ++i) { unsigned Idx = ShiftVal + i; - if (Idx >= NumLaneElts) - Idx += NumElts - NumLaneElts; // End of lane, switch operand. + if (Idx >= 16) + Idx += NumElts - 16; // End of lane, switch operand. Indices[l + i] = Idx + l; } } |
