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cinn(op): fix broadcast op #62594

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Merged
BiynXu merged 2 commits into from
Mar 11, 2024
Merged

cinn(op): fix broadcast op #62594

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ba44930
cinn(op): fix broadcast op
6clc Mar 10, 2024
573f72f
cinn(op): fix broadcast op message
6clc Mar 10, 2024
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13 changes: 8 additions & 5 deletions paddle/cinn/hlir/pe/broadcast.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -376,16 +376,19 @@ Tensor BroadcastTo(const Tensor& A,
const std::vector<ir::Expr>& out_shape,
const std::string& out_name) {
auto A_shape = A->shape;
CHECK_EQ(A_shape.size(), out_shape.size())
<< "broadcast_to's out_shape's size should be same with the input "
"shape's size";
PADDLE_ENFORCE_GE(
out_shape.size(),
A_shape.size(),
"broadcast_to's out_shape's size should be GreaterEqual with the input "
"shape's size");

return Compute(
ToCinnExprs(out_shape),
[=](const std::vector<Expr>& indice) {
std::vector<Expr> broadcast_indice;
for (int idx = 0; idx < out_shape.size(); ++idx) {
ir::Expr a_shape_i = A_shape[idx];
int out_A_offset = out_shape.size() - A_shape.size();
for (int idx = out_A_offset; idx < out_shape.size(); ++idx) {
ir::Expr a_shape_i = A_shape[idx - out_A_offset];
if (MathEqual(a_shape_i, ir::Expr(1))) {
broadcast_indice.push_back(ir::Expr(0));
} else if (MathEqual(a_shape_i, out_shape[idx])) {
Expand Down