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[flang][cuda] Materialize the box in memory when src is emboxed #116289

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Nov 15, 2024
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[flang][cuda] Materialize the box in memory when src is emboxed #116289

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8 changes: 7 additions & 1 deletion flang/lib/Optimizer/Transforms/CUFOpConversion.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -641,8 +641,14 @@ struct CUFDataTransferOpConversion
mlir::Value dst = op.getDst();
mlir::Value src = op.getSrc();

if (!mlir::isa<fir::BaseBoxType>(srcTy))
if (!mlir::isa<fir::BaseBoxType>(srcTy)) {
src = emboxSrc(rewriter, op, symtab);
} else if (mlir::isa<fir::EmboxOp>(src.getDefiningOp())) {
// Materialize the box to memory to be able to call the runtime.
mlir::Value box = builder.createTemporary(loc, src.getType());
builder.create<fir::StoreOp>(loc, src, box);
src = box;
}

auto fTy = func.getFunctionType();
mlir::Value sourceFile = fir::factory::locationToFilename(builder, loc);
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39 changes: 39 additions & 0 deletions flang/test/Fir/CUDA/cuda-data-transfer.fir
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Expand Up @@ -385,4 +385,43 @@ func.func @_QPdevice_addr_conv() {
// CHECK: fir.embox %[[DEV_ADDR_CONV]](%{{.*}}) : (!fir.ref<!fir.array<4xf32>>, !fir.shape<1>) -> !fir.box<!fir.array<4xf32>>
// CHECK: fir.call @_FortranACUFDataTransferDescDescNoRealloc

func.func @_QPdevmul(%arg0: !fir.ref<!fir.array<1x?xf32>> {fir.bindc_name = "b"}, %arg1: !fir.ref<i32> {fir.bindc_name = "wa"}, %arg2: !fir.ref<i32> {fir.bindc_name = "wb"}) {
%c0_i64 = arith.constant 0 : i64
%c1_i32 = arith.constant 1 : i32
%c0_i32 = arith.constant 0 : i32
%c1 = arith.constant 1 : index
%c0 = arith.constant 0 : index
%0 = fir.dummy_scope : !fir.dscope
%1 = fir.declare %arg2 dummy_scope %0 {uniq_name = "_QFdevmulEwb"} : (!fir.ref<i32>, !fir.dscope) -> !fir.ref<i32>
%2 = cuf.alloc !fir.box<!fir.heap<!fir.array<?x?xf32>>> {bindc_name = "bdev", data_attr = #cuf.cuda<device>, uniq_name = "_QFdevmulEbdev"} -> !fir.ref<!fir.box<!fir.heap<!fir.array<?x?xf32>>>>
%6 = fir.declare %2 {data_attr = #cuf.cuda<device>, fortran_attrs = #fir.var_attrs<allocatable>, uniq_name = "_QFdevmulEbdev"} : (!fir.ref<!fir.box<!fir.heap<!fir.array<?x?xf32>>>>) -> !fir.ref<!fir.box<!fir.heap<!fir.array<?x?xf32>>>>
%7 = fir.declare %arg1 dummy_scope %0 {uniq_name = "_QFdevmulEwa"} : (!fir.ref<i32>, !fir.dscope) -> !fir.ref<i32>
%8 = fir.load %1 : !fir.ref<i32>
%9 = fir.convert %8 : (i32) -> index
%12 = fir.shape %c1, %9 : (index, index) -> !fir.shape<2>
%13 = fir.declare %arg0(%12) dummy_scope %0 {uniq_name = "_QFdevmulEb"} : (!fir.ref<!fir.array<1x?xf32>>, !fir.shape<2>, !fir.dscope) -> !fir.ref<!fir.array<1x?xf32>>

%24 = fir.load %7 : !fir.ref<i32>
%25 = fir.convert %24 : (i32) -> index
%26 = arith.cmpi sgt, %25, %c0 : index
%27 = arith.select %26, %25, %c0 : index
%28 = fir.load %1 : !fir.ref<i32>
%29 = fir.convert %28 : (i32) -> index
%30 = arith.cmpi sgt, %29, %c0 : index
%31 = arith.select %30, %29, %c0 : index
%32 = fir.shape %27, %31 : (index, index) -> !fir.shape<2>
%33 = fir.undefined index
%34 = fir.slice %c1, %25, %c1, %c1, %29, %c1 : (index, index, index, index, index, index) -> !fir.slice<2>
%35 = fir.embox %13(%12) [%34] : (!fir.ref<!fir.array<1x?xf32>>, !fir.shape<2>, !fir.slice<2>) -> !fir.box<!fir.array<?x?xf32>>
cuf.data_transfer %35 to %6 {transfer_kind = #cuf.cuda_transfer<host_device>} : !fir.box<!fir.array<?x?xf32>>, !fir.ref<!fir.box<!fir.heap<!fir.array<?x?xf32>>>>
return
}

// CHECK-LABEL: func.func @_QPdevmul(%arg0: !fir.ref<!fir.array<1x?xf32>> {fir.bindc_name = "b"}, %arg1: !fir.ref<i32> {fir.bindc_name = "wa"}, %arg2: !fir.ref<i32> {fir.bindc_name = "wb"}) {
// CHECK: %[[ALLOCA:.*]] = fir.alloca !fir.box<!fir.array<?x?xf32>>
// CHECK: %[[EMBOX:.*]] = fir.embox %{{.*}}(%{{.*}}) [%{{.*}}] : (!fir.ref<!fir.array<1x?xf32>>, !fir.shape<2>, !fir.slice<2>) -> !fir.box<!fir.array<?x?xf32>>
// CHECK: fir.store %[[EMBOX]] to %[[ALLOCA]] : !fir.ref<!fir.box<!fir.array<?x?xf32>>>
// CHECK: %[[SRC:.*]] = fir.convert %[[ALLOCA]] : (!fir.ref<!fir.box<!fir.array<?x?xf32>>>) -> !fir.ref<!fir.box<none>>
// CHECK: fir.call @_FortranACUFDataTransferDescDesc(%{{.*}}, %[[SRC]], %{{.*}}, %{{.*}}, %{{.*}}) : (!fir.ref<!fir.box<none>>, !fir.ref<!fir.box<none>>, i32, !fir.ref<i8>, i32) -> none

} // end of module
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