81f544d465
Introduces a new conversion pass that rewrites `omp.loop` ops to their semantically equivalent op nests bases on the surrounding/binding context of the `loop` op. Not all forms of `omp.loop` are supported yet. See `isLoopConversionSupported` for more info on which forms are supported.
58 lines
2.2 KiB
MLIR
58 lines
2.2 KiB
MLIR
// RUN: fir-opt --omp-generic-loop-conversion %s | FileCheck %s
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omp.private {type = private} @_QFtarget_teams_loopEi_private_ref_i32 : !fir.ref<i32> alloc {
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^bb0(%arg0: !fir.ref<i32>):
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omp.yield(%arg0 : !fir.ref<i32>)
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}
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func.func @_QPtarget_teams_loop() {
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%i = fir.alloca i32
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%i_map = omp.map.info var_ptr(%i : !fir.ref<i32>, i32) map_clauses(implicit, exit_release_or_enter_alloc) capture(ByCopy) -> !fir.ref<i32> {name = "i"}
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omp.target map_entries(%i_map -> %arg0 : !fir.ref<i32>) {
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omp.teams {
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%c0 = arith.constant 0 : i32
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%c10 = arith.constant 10 : i32
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%c1 = arith.constant 1 : i32
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omp.loop private(@_QFtarget_teams_loopEi_private_ref_i32 %arg0 -> %arg2 : !fir.ref<i32>) {
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omp.loop_nest (%arg3) : i32 = (%c0) to (%c10) inclusive step (%c1) {
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fir.store %arg3 to %arg2 : !fir.ref<i32>
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omp.yield
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}
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}
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omp.terminator
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}
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omp.terminator
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}
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return
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}
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// CHECK-LABEL: func.func @_QPtarget_teams_loop
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// CHECK: omp.target map_entries(
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// CHECK-SAME: %{{.*}} -> %[[I_ARG:[^[:space:]]+]] : {{.*}}) {
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//
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// CHECK: omp.teams {
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//
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// TODO we probably need to move the `loop_nest` bounds ops from the `teams`
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// region to the `parallel` region to avoid making these values `shared`. We can
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// find the backward slices of these bounds that are within the `teams` region
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// and move these slices to the `parallel` op.
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// CHECK: %[[LB:.*]] = arith.constant 0 : i32
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// CHECK: %[[UB:.*]] = arith.constant 10 : i32
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// CHECK: %[[STEP:.*]] = arith.constant 1 : i32
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//
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// CHECK: omp.parallel private(@{{.*}} %[[I_ARG]]
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// CHECK-SAME: -> %[[I_PRIV_ARG:[^[:space:]]+]] : !fir.ref<i32>) {
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// CHECK: omp.distribute {
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// CHECK: omp.wsloop {
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//
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// CHECK: omp.loop_nest (%{{.*}}) : i32 =
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// CHECK-SAME: (%[[LB]]) to (%[[UB]]) inclusive step (%[[STEP]]) {
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// CHECK: fir.store %{{.*}} to %[[I_PRIV_ARG]] : !fir.ref<i32>
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// CHECK: }
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// CHECK: }
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// CHECK: }
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// CHECK: }
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// CHECK: }
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// CHECK: }
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