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[flang] Postpone hlfir.end_associate generation for calls. #138786

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Merged
merged 5 commits into from
May 12, 2025
Merged

[flang] Postpone hlfir.end_associate generation for calls. #138786

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5c3fa17
[flang] Postpone hlfir.end_associate generation for calls.
vzakhari May 6, 2025
3c5c9a2
Added test changes missing from the original patch.
vzakhari May 7, 2025
b895e18
Fixed clean-ups insertion for atomic capture.
vzakhari May 8, 2025
6ca7f87
Fixed atomic capture cases with atomic update inside.
vzakhari May 8, 2025
59dee19
Fixed atomic handling for OpenACC.
vzakhari May 10, 2025
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42 changes: 36 additions & 6 deletions flang/lib/Lower/ConvertCall.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -960,9 +960,26 @@ struct CallCleanUp {
mlir::Value tempVar;
mlir::Value mustFree;
};
void genCleanUp(mlir::Location loc, fir::FirOpBuilder &builder) {
Fortran::common::visit([&](auto &c) { c.genCleanUp(loc, builder); },

/// Generate clean-up code.
/// If \p postponeAssociates is true, the ExprAssociate clean-up
/// is not generated, and instead the corresponding CallCleanUp
/// object is returned as the result.
std::optional<CallCleanUp> genCleanUp(mlir::Location loc,
fir::FirOpBuilder &builder,
bool postponeAssociates) {
std::optional<CallCleanUp> postponed;
Fortran::common::visit(Fortran::common::visitors{
[&](CopyIn &c) { c.genCleanUp(loc, builder); },
[&](ExprAssociate &c) {
if (postponeAssociates)
postponed = CallCleanUp{c};
else
c.genCleanUp(loc, builder);
},
},
cleanUp);
return postponed;
}
std::variant<CopyIn, ExprAssociate> cleanUp;
};
Expand Down Expand Up @@ -1729,10 +1746,23 @@ genUserCall(Fortran::lower::PreparedActualArguments &loweredActuals,
caller, callSiteType, callContext.resultType,
callContext.isElementalProcWithArrayArgs());

/// Clean-up associations and copy-in.
for (auto cleanUp : callCleanUps)
cleanUp.genCleanUp(loc, builder);

// Clean-up associations and copy-in.
// The association clean-ups are postponed to the end of the statement
// lowering. The copy-in clean-ups may be delayed as well,
// but they are done immediately after the call currently.
llvm::SmallVector<CallCleanUp> associateCleanups;
for (auto cleanUp : callCleanUps) {
auto postponed =
cleanUp.genCleanUp(loc, builder, /*postponeAssociates=*/true);
if (postponed)
associateCleanups.push_back(*postponed);
}

fir::FirOpBuilder *bldr = &builder;
callContext.stmtCtx.attachCleanup([=]() {
for (auto cleanUp : associateCleanups)
(void)cleanUp.genCleanUp(loc, *bldr, /*postponeAssociates=*/false);
});
if (auto *entity = std::get_if<hlfir::EntityWithAttributes>(&loweredResult))
return *entity;

Expand Down
24 changes: 18 additions & 6 deletions flang/lib/Lower/OpenACC.cpp
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Expand Up @@ -416,7 +416,8 @@ static inline void genAtomicUpdateStatement(
Fortran::lower::AbstractConverter &converter, mlir::Value lhsAddr,
mlir::Type varType, const Fortran::parser::Variable &assignmentStmtVariable,
const Fortran::parser::Expr &assignmentStmtExpr, mlir::Location loc,
mlir::Operation *atomicCaptureOp = nullptr) {
mlir::Operation *atomicCaptureOp = nullptr,
Fortran::lower::StatementContext *atomicCaptureStmtCtx = nullptr) {
// Generate `atomic.update` operation for atomic assignment statements
fir::FirOpBuilder &firOpBuilder = converter.getFirOpBuilder();
mlir::Location currentLocation = converter.getCurrentLocation();
Expand Down Expand Up @@ -496,15 +497,24 @@ static inline void genAtomicUpdateStatement(
},
assignmentStmtExpr.u);
Fortran::lower::StatementContext nonAtomicStmtCtx;
Fortran::lower::StatementContext *stmtCtxPtr = &nonAtomicStmtCtx;
if (!nonAtomicSubExprs.empty()) {
// Generate non atomic part before all the atomic operations.
auto insertionPoint = firOpBuilder.saveInsertionPoint();
if (atomicCaptureOp)
if (atomicCaptureOp) {
assert(atomicCaptureStmtCtx && "must specify statement context");
firOpBuilder.setInsertionPoint(atomicCaptureOp);
// Any clean-ups associated with the expression lowering
// must also be generated outside of the atomic update operation
// and after the atomic capture operation.
// The atomicCaptureStmtCtx will be finalized at the end
// of the atomic capture operation generation.
stmtCtxPtr = atomicCaptureStmtCtx;
}
mlir::Value nonAtomicVal;
for (auto *nonAtomicSubExpr : nonAtomicSubExprs) {
nonAtomicVal = fir::getBase(converter.genExprValue(
currentLocation, *nonAtomicSubExpr, nonAtomicStmtCtx));
currentLocation, *nonAtomicSubExpr, *stmtCtxPtr));
exprValueOverrides.try_emplace(nonAtomicSubExpr, nonAtomicVal);
}
if (atomicCaptureOp)
Expand Down Expand Up @@ -652,7 +662,7 @@ void genAtomicCapture(Fortran::lower::AbstractConverter &converter,
genAtomicCaptureStatement(converter, stmt2LHSArg, stmt1LHSArg,
elementType, loc);
genAtomicUpdateStatement(converter, stmt2LHSArg, stmt2VarType, stmt2Var,
stmt2Expr, loc, atomicCaptureOp);
stmt2Expr, loc, atomicCaptureOp, &stmtCtx);
} else {
// Atomic capture construct is of the form [capture-stmt, write-stmt]
firOpBuilder.setInsertionPoint(atomicCaptureOp);
Expand All @@ -672,13 +682,15 @@ void genAtomicCapture(Fortran::lower::AbstractConverter &converter,
*Fortran::semantics::GetExpr(stmt2Expr);
mlir::Type elementType = converter.genType(fromExpr);
genAtomicUpdateStatement(converter, stmt1LHSArg, stmt1VarType, stmt1Var,
stmt1Expr, loc, atomicCaptureOp);
stmt1Expr, loc, atomicCaptureOp, &stmtCtx);
genAtomicCaptureStatement(converter, stmt1LHSArg, stmt2LHSArg, elementType,
loc);
}
firOpBuilder.setInsertionPointToEnd(&block);
firOpBuilder.create<mlir::acc::TerminatorOp>(loc);
firOpBuilder.setInsertionPointToStart(&block);
// The clean-ups associated with the statements inside the capture
// construct must be generated after the AtomicCaptureOp.
firOpBuilder.setInsertionPointAfter(atomicCaptureOp);
}

template <typename Op>
Expand Down
24 changes: 18 additions & 6 deletions flang/lib/Lower/OpenMP/OpenMP.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2816,7 +2816,8 @@ static void genAtomicUpdateStatement(
const parser::Expr &assignmentStmtExpr,
const parser::OmpAtomicClauseList *leftHandClauseList,
const parser::OmpAtomicClauseList *rightHandClauseList, mlir::Location loc,
mlir::Operation *atomicCaptureOp = nullptr) {
mlir::Operation *atomicCaptureOp = nullptr,
lower::StatementContext *atomicCaptureStmtCtx = nullptr) {
// Generate `atomic.update` operation for atomic assignment statements
fir::FirOpBuilder &firOpBuilder = converter.getFirOpBuilder();
mlir::Location currentLocation = converter.getCurrentLocation();
Expand Down Expand Up @@ -2890,15 +2891,24 @@ static void genAtomicUpdateStatement(
},
assignmentStmtExpr.u);
lower::StatementContext nonAtomicStmtCtx;
lower::StatementContext *stmtCtxPtr = &nonAtomicStmtCtx;
if (!nonAtomicSubExprs.empty()) {
// Generate non atomic part before all the atomic operations.
auto insertionPoint = firOpBuilder.saveInsertionPoint();
if (atomicCaptureOp)
if (atomicCaptureOp) {
assert(atomicCaptureStmtCtx && "must specify statement context");
firOpBuilder.setInsertionPoint(atomicCaptureOp);
// Any clean-ups associated with the expression lowering
// must also be generated outside of the atomic update operation
// and after the atomic capture operation.
// The atomicCaptureStmtCtx will be finalized at the end
// of the atomic capture operation generation.
stmtCtxPtr = atomicCaptureStmtCtx;
}
mlir::Value nonAtomicVal;
for (auto *nonAtomicSubExpr : nonAtomicSubExprs) {
nonAtomicVal = fir::getBase(converter.genExprValue(
currentLocation, *nonAtomicSubExpr, nonAtomicStmtCtx));
currentLocation, *nonAtomicSubExpr, *stmtCtxPtr));
exprValueOverrides.try_emplace(nonAtomicSubExpr, nonAtomicVal);
}
if (atomicCaptureOp)
Expand Down Expand Up @@ -3238,7 +3248,7 @@ static void genAtomicCapture(lower::AbstractConverter &converter,
genAtomicUpdateStatement(
converter, stmt2LHSArg, stmt2VarType, stmt2Var, stmt2Expr,
/*leftHandClauseList=*/nullptr,
/*rightHandClauseList=*/nullptr, loc, atomicCaptureOp);
/*rightHandClauseList=*/nullptr, loc, atomicCaptureOp, &stmtCtx);
} else {
// Atomic capture construct is of the form [capture-stmt, write-stmt]
firOpBuilder.setInsertionPoint(atomicCaptureOp);
Expand Down Expand Up @@ -3284,7 +3294,7 @@ static void genAtomicCapture(lower::AbstractConverter &converter,
genAtomicUpdateStatement(
converter, stmt1LHSArg, stmt1VarType, stmt1Var, stmt1Expr,
/*leftHandClauseList=*/nullptr,
/*rightHandClauseList=*/nullptr, loc, atomicCaptureOp);
/*rightHandClauseList=*/nullptr, loc, atomicCaptureOp, &stmtCtx);

if (stmt1VarType != stmt2VarType) {
mlir::Value alloca;
Expand Down Expand Up @@ -3316,7 +3326,9 @@ static void genAtomicCapture(lower::AbstractConverter &converter,
}
firOpBuilder.setInsertionPointToEnd(&block);
firOpBuilder.create<mlir::omp::TerminatorOp>(loc);
firOpBuilder.setInsertionPointToStart(&block);
// The clean-ups associated with the statements inside the capture
// construct must be generated after the AtomicCaptureOp.
firOpBuilder.setInsertionPointAfter(atomicCaptureOp);
}

//===----------------------------------------------------------------------===//
Expand Down
85 changes: 85 additions & 0 deletions flang/test/Lower/HLFIR/call-postponed-associate.f90
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@@ -0,0 +1,85 @@
! RUN: bbc -emit-hlfir -o - %s -I nowhere | FileCheck %s

subroutine test1
interface
function array_func1(x)
real:: x, array_func1(10)
end function array_func1
end interface
real :: x(10)
x = array_func1(1.0)
end subroutine test1
! CHECK-LABEL: func.func @_QPtest1() {
! CHECK: %[[VAL_5:.*]] = arith.constant 1.000000e+00 : f32
! CHECK: %[[VAL_6:.*]]:3 = hlfir.associate %[[VAL_5]] {adapt.valuebyref} : (f32) -> (!fir.ref<f32>, !fir.ref<f32>, i1)
! CHECK: %[[VAL_17:.*]] = hlfir.eval_in_mem shape %{{.*}} : (!fir.shape<1>) -> !hlfir.expr<10xf32> {
! CHECK: fir.call @_QParray_func1
! CHECK: fir.save_result
! CHECK: }
! CHECK: hlfir.assign %[[VAL_17]] to %{{.*}} : !hlfir.expr<10xf32>, !fir.ref<!fir.array<10xf32>>
! CHECK: hlfir.end_associate %[[VAL_6]]#1, %[[VAL_6]]#2 : !fir.ref<f32>, i1

subroutine test2(x)
interface
function array_func2(x,y)
real:: x(*), array_func2(10), y
end function array_func2
end interface
real :: x(:)
x = array_func2(x, 1.0)
end subroutine test2
! CHECK-LABEL: func.func @_QPtest2(
! CHECK: %[[VAL_3:.*]] = arith.constant 1.000000e+00 : f32
! CHECK: %[[VAL_4:.*]]:2 = hlfir.copy_in %{{.*}} to %{{.*}} : (!fir.box<!fir.array<?xf32>>, !fir.ref<!fir.box<!fir.heap<!fir.array<?xf32>>>>) -> (!fir.box<!fir.array<?xf32>>, i1)
! CHECK: %[[VAL_5:.*]] = fir.box_addr %[[VAL_4]]#0 : (!fir.box<!fir.array<?xf32>>) -> !fir.ref<!fir.array<?xf32>>
! CHECK: %[[VAL_6:.*]]:3 = hlfir.associate %[[VAL_3]] {adapt.valuebyref} : (f32) -> (!fir.ref<f32>, !fir.ref<f32>, i1)
! CHECK: %[[VAL_17:.*]] = hlfir.eval_in_mem shape %{{.*}} : (!fir.shape<1>) -> !hlfir.expr<10xf32> {
! CHECK: ^bb0(%[[VAL_18:.*]]: !fir.ref<!fir.array<10xf32>>):
! CHECK: %[[VAL_19:.*]] = fir.call @_QParray_func2(%[[VAL_5]], %[[VAL_6]]#0) fastmath<contract> : (!fir.ref<!fir.array<?xf32>>, !fir.ref<f32>) -> !fir.array<10xf32>
! CHECK: fir.save_result %[[VAL_19]] to %[[VAL_18]](%{{.*}}) : !fir.array<10xf32>, !fir.ref<!fir.array<10xf32>>, !fir.shape<1>
! CHECK: }
! CHECK: hlfir.copy_out %{{.*}}, %[[VAL_4]]#1 to %{{.*}} : (!fir.ref<!fir.box<!fir.heap<!fir.array<?xf32>>>>, i1, !fir.box<!fir.array<?xf32>>) -> ()
! CHECK: hlfir.assign %[[VAL_17]] to %{{.*}} : !hlfir.expr<10xf32>, !fir.box<!fir.array<?xf32>>
! CHECK: hlfir.end_associate %[[VAL_6]]#1, %[[VAL_6]]#2 : !fir.ref<f32>, i1
! CHECK: hlfir.destroy %[[VAL_17]] : !hlfir.expr<10xf32>

subroutine test3(x)
interface
function array_func3(x)
real :: x, array_func3(10)
end function array_func3
end interface
logical :: x
if (any(array_func3(1.0).le.array_func3(2.0))) x = .true.
end subroutine test3
! CHECK-LABEL: func.func @_QPtest3(
! CHECK: %[[VAL_2:.*]] = arith.constant 1.000000e+00 : f32
! CHECK: %[[VAL_3:.*]]:3 = hlfir.associate %[[VAL_2]] {adapt.valuebyref} : (f32) -> (!fir.ref<f32>, !fir.ref<f32>, i1)
! CHECK: %[[VAL_14:.*]] = hlfir.eval_in_mem shape %{{.*}} : (!fir.shape<1>) -> !hlfir.expr<10xf32> {
! CHECK: ^bb0(%[[VAL_15:.*]]: !fir.ref<!fir.array<10xf32>>):
! CHECK: %[[VAL_16:.*]] = fir.call @_QParray_func3(%[[VAL_3]]#0) fastmath<contract> : (!fir.ref<f32>) -> !fir.array<10xf32>
! CHECK: fir.save_result %[[VAL_16]] to %[[VAL_15]](%{{.*}}) : !fir.array<10xf32>, !fir.ref<!fir.array<10xf32>>, !fir.shape<1>
! CHECK: }
! CHECK: %[[VAL_17:.*]] = arith.constant 2.000000e+00 : f32
! CHECK: %[[VAL_18:.*]]:3 = hlfir.associate %[[VAL_17]] {adapt.valuebyref} : (f32) -> (!fir.ref<f32>, !fir.ref<f32>, i1)
! CHECK: %[[VAL_29:.*]] = hlfir.eval_in_mem shape %{{.*}} : (!fir.shape<1>) -> !hlfir.expr<10xf32> {
! CHECK: ^bb0(%[[VAL_30:.*]]: !fir.ref<!fir.array<10xf32>>):
! CHECK: %[[VAL_31:.*]] = fir.call @_QParray_func3(%[[VAL_18]]#0) fastmath<contract> : (!fir.ref<f32>) -> !fir.array<10xf32>
! CHECK: fir.save_result %[[VAL_31]] to %[[VAL_30]](%{{.*}}) : !fir.array<10xf32>, !fir.ref<!fir.array<10xf32>>, !fir.shape<1>
! CHECK: }
! CHECK: %[[VAL_32:.*]] = hlfir.elemental %{{.*}} unordered : (!fir.shape<1>) -> !hlfir.expr<?x!fir.logical<4>> {
! CHECK: ^bb0(%[[VAL_33:.*]]: index):
! CHECK: %[[VAL_34:.*]] = hlfir.apply %[[VAL_14]], %[[VAL_33]] : (!hlfir.expr<10xf32>, index) -> f32
! CHECK: %[[VAL_35:.*]] = hlfir.apply %[[VAL_29]], %[[VAL_33]] : (!hlfir.expr<10xf32>, index) -> f32
! CHECK: %[[VAL_36:.*]] = arith.cmpf ole, %[[VAL_34]], %[[VAL_35]] fastmath<contract> : f32
! CHECK: %[[VAL_37:.*]] = fir.convert %[[VAL_36]] : (i1) -> !fir.logical<4>
! CHECK: hlfir.yield_element %[[VAL_37]] : !fir.logical<4>
! CHECK: }
! CHECK: %[[VAL_38:.*]] = hlfir.any %[[VAL_32]] : (!hlfir.expr<?x!fir.logical<4>>) -> !fir.logical<4>
! CHECK: hlfir.destroy %[[VAL_32]] : !hlfir.expr<?x!fir.logical<4>>
! CHECK: hlfir.end_associate %[[VAL_18]]#1, %[[VAL_18]]#2 : !fir.ref<f32>, i1
! CHECK: hlfir.destroy %[[VAL_29]] : !hlfir.expr<10xf32>
! CHECK: hlfir.end_associate %[[VAL_3]]#1, %[[VAL_3]]#2 : !fir.ref<f32>, i1
! CHECK: hlfir.destroy %[[VAL_14]] : !hlfir.expr<10xf32>
! CHECK: %[[VAL_39:.*]] = fir.convert %[[VAL_38]] : (!fir.logical<4>) -> i1
! CHECK: fir.if %[[VAL_39]] {
8 changes: 4 additions & 4 deletions flang/test/Lower/HLFIR/entry_return.f90
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Expand Up @@ -51,13 +51,13 @@ logical function f2()
! CHECK: %[[VAL_6:.*]]:3 = hlfir.associate %[[VAL_4]] {adapt.valuebyref} : (f32) -> (!fir.ref<f32>, !fir.ref<f32>, i1)
! CHECK: %[[VAL_7:.*]]:3 = hlfir.associate %[[VAL_5]] {adapt.valuebyref} : (f32) -> (!fir.ref<f32>, !fir.ref<f32>, i1)
! CHECK: %[[VAL_8:.*]] = fir.call @_QPcomplex(%[[VAL_6]]#0, %[[VAL_7]]#0) fastmath<contract> : (!fir.ref<f32>, !fir.ref<f32>) -> f32
! CHECK: hlfir.end_associate %[[VAL_6]]#1, %[[VAL_6]]#2 : !fir.ref<f32>, i1
! CHECK: hlfir.end_associate %[[VAL_7]]#1, %[[VAL_7]]#2 : !fir.ref<f32>, i1
! CHECK: %[[VAL_9:.*]] = arith.constant 0.000000e+00 : f32
! CHECK: %[[VAL_10:.*]] = fir.undefined complex<f32>
! CHECK: %[[VAL_11:.*]] = fir.insert_value %[[VAL_10]], %[[VAL_8]], [0 : index] : (complex<f32>, f32) -> complex<f32>
! CHECK: %[[VAL_12:.*]] = fir.insert_value %[[VAL_11]], %[[VAL_9]], [1 : index] : (complex<f32>, f32) -> complex<f32>
! CHECK: hlfir.assign %[[VAL_12]] to %[[VAL_1]]#0 : complex<f32>, !fir.ref<complex<f32>>
! CHECK: hlfir.end_associate %[[VAL_6]]#1, %[[VAL_6]]#2 : !fir.ref<f32>, i1
! CHECK: hlfir.end_associate %[[VAL_7]]#1, %[[VAL_7]]#2 : !fir.ref<f32>, i1
! CHECK: %[[VAL_13:.*]] = fir.load %[[VAL_3]]#0 : !fir.ref<!fir.logical<4>>
! CHECK: return %[[VAL_13]] : !fir.logical<4>
! CHECK: }
Expand All @@ -74,13 +74,13 @@ logical function f2()
! CHECK: %[[VAL_6:.*]]:3 = hlfir.associate %[[VAL_4]] {adapt.valuebyref} : (f32) -> (!fir.ref<f32>, !fir.ref<f32>, i1)
! CHECK: %[[VAL_7:.*]]:3 = hlfir.associate %[[VAL_5]] {adapt.valuebyref} : (f32) -> (!fir.ref<f32>, !fir.ref<f32>, i1)
! CHECK: %[[VAL_8:.*]] = fir.call @_QPcomplex(%[[VAL_6]]#0, %[[VAL_7]]#0) fastmath<contract> : (!fir.ref<f32>, !fir.ref<f32>) -> f32
! CHECK: hlfir.end_associate %[[VAL_6]]#1, %[[VAL_6]]#2 : !fir.ref<f32>, i1
! CHECK: hlfir.end_associate %[[VAL_7]]#1, %[[VAL_7]]#2 : !fir.ref<f32>, i1
! CHECK: %[[VAL_9:.*]] = arith.constant 0.000000e+00 : f32
! CHECK: %[[VAL_10:.*]] = fir.undefined complex<f32>
! CHECK: %[[VAL_11:.*]] = fir.insert_value %[[VAL_10]], %[[VAL_8]], [0 : index] : (complex<f32>, f32) -> complex<f32>
! CHECK: %[[VAL_12:.*]] = fir.insert_value %[[VAL_11]], %[[VAL_9]], [1 : index] : (complex<f32>, f32) -> complex<f32>
! CHECK: hlfir.assign %[[VAL_12]] to %[[VAL_1]]#0 : complex<f32>, !fir.ref<complex<f32>>
! CHECK: hlfir.end_associate %[[VAL_6]]#1, %[[VAL_6]]#2 : !fir.ref<f32>, i1
! CHECK: hlfir.end_associate %[[VAL_7]]#1, %[[VAL_7]]#2 : !fir.ref<f32>, i1
! CHECK: %[[VAL_13:.*]] = fir.load %[[VAL_1]]#0 : !fir.ref<complex<f32>>
! CHECK: return %[[VAL_13]] : complex<f32>
! CHECK: }
2 changes: 1 addition & 1 deletion flang/test/Lower/HLFIR/proc-pointer-comp-nopass.f90
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Expand Up @@ -32,8 +32,8 @@ real function test1(x)
! CHECK: %[[VAL_7:.*]] = fir.load %[[VAL_6]] : !fir.ref<!fir.boxproc<(!fir.ref<f32>) -> f32>>
! CHECK: %[[VAL_8:.*]] = fir.box_addr %[[VAL_7]] : (!fir.boxproc<(!fir.ref<f32>) -> f32>) -> ((!fir.ref<f32>) -> f32)
! CHECK: %[[VAL_9:.*]] = fir.call %[[VAL_8]](%[[VAL_5]]#0) fastmath<contract> : (!fir.ref<f32>) -> f32
! CHECK: hlfir.end_associate %[[VAL_5]]#1, %[[VAL_5]]#2 : !fir.ref<f32>, i1
! CHECK: hlfir.assign %[[VAL_9]] to %[[VAL_2]]#0 : f32, !fir.ref<f32>
! CHECK: hlfir.end_associate %[[VAL_5]]#1, %[[VAL_5]]#2 : !fir.ref<f32>, i1

subroutine test2(x)
use proc_comp_defs, only : t, iface
Expand Down
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