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[flang][OpenMP] Fix LASTPRIVATE for iteration variables #69773
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| ! Test LASTPRIVATE with iteration variable. | ||
| ! RUN: %flang_fc1 -emit-hlfir -fopenmp -o - %s 2>&1 | FileCheck %s | ||
|
|
||
| !CHECK-LABEL: func @_QPlastprivate_iv_inc | ||
| !CHECK: %[[I_MEM:.*]] = fir.alloca i32 {adapt.valuebyref, pinned} | ||
| !CHECK: %[[I:.*]]:2 = hlfir.declare %[[I_MEM]] {uniq_name = "_QFlastprivate_iv_incEi"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>) | ||
| !CHECK: %[[I2_MEM:.*]] = fir.alloca i32 {bindc_name = "i", uniq_name = "_QFlastprivate_iv_incEi"} | ||
| !CHECK: %[[I2:.*]]:2 = hlfir.declare %[[I2_MEM]] {uniq_name = "_QFlastprivate_iv_incEi"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>) | ||
| !CHECK: %[[LB:.*]] = arith.constant 4 : i32 | ||
| !CHECK: %[[UB:.*]] = arith.constant 10 : i32 | ||
| !CHECK: %[[STEP:.*]] = arith.constant 3 : i32 | ||
| !CHECK: omp.wsloop for (%[[IV:.*]]) : i32 = (%[[LB]]) to (%[[UB]]) inclusive step (%[[STEP]]) { | ||
| !CHECK: fir.store %[[IV]] to %[[I]]#1 : !fir.ref<i32> | ||
| !CHECK: %[[V:.*]] = arith.addi %[[IV]], %[[STEP]] : i32 | ||
| !CHECK: %[[C0:.*]] = arith.constant 0 : i32 | ||
| !CHECK: %[[STEP_NEG:.*]] = arith.cmpi slt, %[[STEP]], %[[C0]] : i32 | ||
| !CHECK: %[[V_LT:.*]] = arith.cmpi slt, %[[V]], %[[UB]] : i32 | ||
| !CHECK: %[[V_GT:.*]] = arith.cmpi sgt, %[[V]], %[[UB]] : i32 | ||
| !CHECK: %[[CMP:.*]] = arith.select %[[STEP_NEG]], %[[V_LT]], %[[V_GT]] : i1 | ||
| !CHECK: fir.if %[[CMP]] { | ||
| !CHECK: fir.store %[[V]] to %[[I]]#1 : !fir.ref<i32> | ||
| !CHECK: %[[I_VAL:.*]] = fir.load %[[I]]#0 : !fir.ref<i32> | ||
| !CHECK: hlfir.assign %[[I_VAL]] to %[[I2]]#0 temporary_lhs : i32, !fir.ref<i32> | ||
| !CHECK: } | ||
| !CHECK: omp.yield | ||
| !CHECK: } | ||
| subroutine lastprivate_iv_inc() | ||
| integer :: i | ||
|
|
||
| !$omp do lastprivate(i) | ||
| do i = 4, 10, 3 | ||
| end do | ||
| !$omp end do | ||
| end subroutine | ||
|
|
||
| !CHECK-LABEL: func @_QPlastprivate_iv_dec | ||
| !CHECK: %[[I_MEM:.*]] = fir.alloca i32 {adapt.valuebyref, pinned} | ||
| !CHECK: %[[I:.*]]:2 = hlfir.declare %[[I_MEM]] {uniq_name = "_QFlastprivate_iv_decEi"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>) | ||
| !CHECK: %[[I2_MEM:.*]] = fir.alloca i32 {bindc_name = "i", uniq_name = "_QFlastprivate_iv_decEi"} | ||
| !CHECK: %[[I2:.*]]:2 = hlfir.declare %[[I2_MEM]] {uniq_name = "_QFlastprivate_iv_decEi"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>) | ||
| !CHECK: %[[LB:.*]] = arith.constant 10 : i32 | ||
| !CHECK: %[[UB:.*]] = arith.constant 1 : i32 | ||
| !CHECK: %[[STEP:.*]] = arith.constant -3 : i32 | ||
| !CHECK: omp.wsloop for (%[[IV:.*]]) : i32 = (%[[LB]]) to (%[[UB]]) inclusive step (%[[STEP]]) { | ||
| !CHECK: fir.store %[[IV]] to %[[I]]#1 : !fir.ref<i32> | ||
| !CHECK: %[[V:.*]] = arith.addi %[[IV]], %[[STEP]] : i32 | ||
| !CHECK: %[[C0:.*]] = arith.constant 0 : i32 | ||
| !CHECK: %[[STEP_NEG:.*]] = arith.cmpi slt, %[[STEP]], %[[C0]] : i32 | ||
| !CHECK: %[[V_LT:.*]] = arith.cmpi slt, %[[V]], %[[UB]] : i32 | ||
| !CHECK: %[[V_GT:.*]] = arith.cmpi sgt, %[[V]], %[[UB]] : i32 | ||
| !CHECK: %[[CMP:.*]] = arith.select %[[STEP_NEG]], %[[V_LT]], %[[V_GT]] : i1 | ||
| !CHECK: fir.if %[[CMP]] { | ||
| !CHECK: fir.store %[[V]] to %[[I]]#1 : !fir.ref<i32> | ||
| !CHECK: %[[I_VAL:.*]] = fir.load %[[I]]#0 : !fir.ref<i32> | ||
| !CHECK: hlfir.assign %[[I_VAL]] to %[[I2]]#0 temporary_lhs : i32, !fir.ref<i32> | ||
| !CHECK: } | ||
| !CHECK: omp.yield | ||
| !CHECK: } | ||
| subroutine lastprivate_iv_dec() | ||
| integer :: i | ||
|
|
||
| !$omp do lastprivate(i) | ||
| do i = 10, 1, -3 | ||
| end do | ||
| !$omp end do | ||
| end subroutine |
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Nit: An additional
fit.storehere is redundant. We expect all last private operations to be abstracted within^%lpv_update_blkThere was a problem hiding this comment.
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The
fir.storehere is needed. Considering the example of the previous conversation,loopIVis updated in the beginning of the loop body only, to have the same value asiv, but we need it to holdvinstead (iv+step). Also,^%lpv_update_blkcopiesloopIVtoiaand notivtoloopIV. In the end this store gets optimized, because^%lpv_update_blkgenerates a loadloopIVright after it.