[flang][OpenMP] Only use HLFIR base in privatization logic #84123
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@llvm/pr-subscribers-flang-openmp @llvm/pr-subscribers-flang-fir-hlfir Author: Kareem Ergawy (ergawy) ChangesAn experimental diff to discuss using only the first component of This is not meant to be merged, at least for now. Full diff: https://github.com/llvm/llvm-project/pull/84123.diff 5 Files Affected:
diff --git a/flang/include/flang/Optimizer/Builder/HLFIRTools.h b/flang/include/flang/Optimizer/Builder/HLFIRTools.h
index 170e134baef614..5177dd2746d7eb 100644
--- a/flang/include/flang/Optimizer/Builder/HLFIRTools.h
+++ b/flang/include/flang/Optimizer/Builder/HLFIRTools.h
@@ -194,7 +194,7 @@ class Entity : public mlir::Value {
// information, or has access to it in other ways. Its advantage is that
// it will never be a fir.box for explicit shape arrays, leading to simpler
// FIR code generation.
- mlir::Value getFirBase() const;
+ mlir::Value getFirBase(bool forceDeclBaseHACK = false) const;
};
/// Wrapper over an mlir::Value that can be viewed as a Fortran entity.
@@ -230,7 +230,8 @@ translateToExtendedValue(mlir::Location loc, fir::FirOpBuilder &builder,
/// on the IR.
fir::ExtendedValue
translateToExtendedValue(mlir::Location loc, fir::FirOpBuilder &builder,
- fir::FortranVariableOpInterface fortranVariable);
+ fir::FortranVariableOpInterface fortranVariable,
+ bool forceDeclBaseHACK = false);
/// Generate declaration for a fir::ExtendedValue in memory.
fir::FortranVariableOpInterface
diff --git a/flang/lib/Lower/Bridge.cpp b/flang/lib/Lower/Bridge.cpp
index 8048693119b4c5..225aefbbf31af8 100644
--- a/flang/lib/Lower/Bridge.cpp
+++ b/flang/lib/Lower/Bridge.cpp
@@ -618,7 +618,7 @@ class FirConverter : public Fortran::lower::AbstractConverter {
assert(details && "No host-association found");
const Fortran::semantics::Symbol &hsym = details->symbol();
mlir::Type hSymType = genType(hsym);
- Fortran::lower::SymbolBox hsb = lookupSymbol(hsym);
+ Fortran::lower::SymbolBox hsb = lookupSymbol(hsym, nullptr, true);
auto allocate = [&](llvm::ArrayRef<mlir::Value> shape,
llvm::ArrayRef<mlir::Value> typeParams) -> mlir::Value {
@@ -727,7 +727,7 @@ class FirConverter : public Fortran::lower::AbstractConverter {
void createHostAssociateVarCloneDealloc(
const Fortran::semantics::Symbol &sym) override final {
mlir::Location loc = genLocation(sym.name());
- Fortran::lower::SymbolBox hsb = lookupSymbol(sym);
+ Fortran::lower::SymbolBox hsb = lookupSymbol(sym, nullptr, true);
fir::ExtendedValue hexv = symBoxToExtendedValue(hsb);
hexv.match(
@@ -960,13 +960,14 @@ class FirConverter : public Fortran::lower::AbstractConverter {
/// Find the symbol in the local map or return null.
Fortran::lower::SymbolBox
lookupSymbol(const Fortran::semantics::Symbol &sym,
- Fortran::lower::SymMap *symMap = nullptr) {
+ Fortran::lower::SymMap *symMap = nullptr,
+ bool forceDeclBaseHACK = false) {
symMap = symMap ? symMap : &localSymbols;
if (lowerToHighLevelFIR()) {
if (std::optional<fir::FortranVariableOpInterface> var =
symMap->lookupVariableDefinition(sym)) {
auto exv =
- hlfir::translateToExtendedValue(toLocation(), *builder, *var);
+ hlfir::translateToExtendedValue(toLocation(), *builder, *var, forceDeclBaseHACK);
return exv.match(
[](mlir::Value x) -> Fortran::lower::SymbolBox {
return Fortran::lower::SymbolBox::Intrinsic{x};
diff --git a/flang/lib/Optimizer/Builder/HLFIRTools.cpp b/flang/lib/Optimizer/Builder/HLFIRTools.cpp
index 4ffa303f27103a..9be563a41ea97a 100644
--- a/flang/lib/Optimizer/Builder/HLFIRTools.cpp
+++ b/flang/lib/Optimizer/Builder/HLFIRTools.cpp
@@ -183,11 +183,12 @@ static fir::CharBoxValue genUnboxChar(mlir::Location loc,
return {addr, len};
}
-mlir::Value hlfir::Entity::getFirBase() const {
+mlir::Value hlfir::Entity::getFirBase(bool forceDeclBaseHACK) const {
if (fir::FortranVariableOpInterface variable = getIfVariableInterface()) {
if (auto declareOp =
mlir::dyn_cast<hlfir::DeclareOp>(variable.getOperation()))
- return declareOp.getOriginalBase();
+ return forceDeclBaseHACK ? declareOp.getBase()
+ : declareOp.getOriginalBase();
if (auto associateOp =
mlir::dyn_cast<hlfir::AssociateOp>(variable.getOperation()))
return associateOp.getFirBase();
@@ -848,11 +849,12 @@ hlfir::LoopNest hlfir::genLoopNest(mlir::Location loc,
static fir::ExtendedValue
translateVariableToExtendedValue(mlir::Location loc, fir::FirOpBuilder &builder,
- hlfir::Entity variable) {
+ hlfir::Entity variable,
+ bool forceDeclBaseHACK = false) {
assert(variable.isVariable() && "must be a variable");
/// When going towards FIR, use the original base value to avoid
/// introducing descriptors at runtime when they are not required.
- mlir::Value firBase = variable.getFirBase();
+ mlir::Value firBase = variable.getFirBase(forceDeclBaseHACK);
if (variable.isMutableBox())
return fir::MutableBoxValue(firBase, getExplicitTypeParams(variable),
fir::MutableProperties{});
@@ -900,8 +902,9 @@ translateVariableToExtendedValue(mlir::Location loc, fir::FirOpBuilder &builder,
fir::ExtendedValue
hlfir::translateToExtendedValue(mlir::Location loc, fir::FirOpBuilder &builder,
- fir::FortranVariableOpInterface var) {
- return translateVariableToExtendedValue(loc, builder, var);
+ fir::FortranVariableOpInterface var,
+ bool forceDeclBaseHACK) {
+ return translateVariableToExtendedValue(loc, builder, var, forceDeclBaseHACK);
}
std::pair<fir::ExtendedValue, std::optional<hlfir::CleanupFunction>>
diff --git a/flang/test/Lower/OpenMP/parallel-private-clause-str.f90 b/flang/test/Lower/OpenMP/parallel-private-clause-str.f90
index f668957624b497..025e51e0661764 100644
--- a/flang/test/Lower/OpenMP/parallel-private-clause-str.f90
+++ b/flang/test/Lower/OpenMP/parallel-private-clause-str.f90
@@ -10,7 +10,7 @@
!CHECK: %[[C_DECL:.*]]:2 = hlfir.declare %[[C_BOX_REF]] typeparams %{{.*}} {fortran_attrs = #fir.var_attrs<allocatable>, uniq_name = "_QFtest_allocatable_stringEc"} : (!fir.ref<!fir.box<!fir.heap<!fir.char<1,?>>>>, i32) -> (!fir.ref<!fir.box<!fir.heap<!fir.char<1,?>>>>, !fir.ref<!fir.box<!fir.heap<!fir.char<1,?>>>>)
!CHECK: omp.parallel {
!CHECK: %[[C_PVT_BOX_REF:.*]] = fir.alloca !fir.box<!fir.heap<!fir.char<1,?>>> {bindc_name = "c", pinned, uniq_name = "_QFtest_allocatable_stringEc"}
-!CHECK: %[[C_BOX:.*]] = fir.load %[[C_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<!fir.char<1,?>>>>
+!CHECK: %[[C_BOX:.*]] = fir.load %[[C_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<!fir.char<1,?>>>>
!CHECK: fir.if %{{.*}} {
!CHECK: %[[C_PVT_MEM:.*]] = fir.allocmem !fir.char<1,?>(%{{.*}} : index) {fir.must_be_heap = true, uniq_name = "_QFtest_allocatable_stringEc.alloc"}
!CHECK: %[[C_PVT_BOX:.*]] = fir.embox %[[C_PVT_MEM]] typeparams %{{.*}} : (!fir.heap<!fir.char<1,?>>, index) -> !fir.box<!fir.heap<!fir.char<1,?>>>
@@ -18,7 +18,7 @@
!CHECK: }
!CHECK: %[[C_PVT_DECL:.*]]:2 = hlfir.declare %[[C_PVT_BOX_REF]] {fortran_attrs = #fir.var_attrs<allocatable>, uniq_name = "_QFtest_allocatable_stringEc"} : (!fir.ref<!fir.box<!fir.heap<!fir.char<1,?>>>>) -> (!fir.ref<!fir.box<!fir.heap<!fir.char<1,?>>>>, !fir.ref<!fir.box<!fir.heap<!fir.char<1,?>>>>)
!CHECK: fir.if %{{.*}} {
-!CHECK: %[[C_PVT_BOX:.*]] = fir.load %[[C_PVT_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<!fir.char<1,?>>>>
+!CHECK: %[[C_PVT_BOX:.*]] = fir.load %[[C_PVT_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<!fir.char<1,?>>>>
!CHECK: %[[C_PVT_BOX_ADDR:.*]] = fir.box_addr %[[C_PVT_BOX]] : (!fir.box<!fir.heap<!fir.char<1,?>>>) -> !fir.heap<!fir.char<1,?>>
!CHECK: fir.freemem %[[C_PVT_BOX_ADDR]] : !fir.heap<!fir.char<1,?>>
!CHECK: }
@@ -38,16 +38,16 @@ subroutine test_allocatable_string(n)
!CHECK: %[[C_DECL:.*]]:2 = hlfir.declare %[[C_BOX_REF]] typeparams %{{.*}} {fortran_attrs = #fir.var_attrs<allocatable>, uniq_name = "_QFtest_allocatable_string_arrayEc"} : (!fir.ref<!fir.box<!fir.heap<!fir.array<?x!fir.char<1,?>>>>>, i32) -> (!fir.ref<!fir.box<!fir.heap<!fir.array<?x!fir.char<1,?>>>>>, !fir.ref<!fir.box<!fir.heap<!fir.array<?x!fir.char<1,?>>>>>)
!CHECK: omp.parallel {
!CHECK: %[[C_PVT_BOX_REF:.*]] = fir.alloca !fir.box<!fir.heap<!fir.array<?x!fir.char<1,?>>>> {bindc_name = "c", pinned, uniq_name = "_QFtest_allocatable_string_arrayEc"}
-!CHECK: %{{.*}} = fir.load %[[C_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<!fir.array<?x!fir.char<1,?>>>>>
+!CHECK: %{{.*}} = fir.load %[[C_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<!fir.array<?x!fir.char<1,?>>>>>
!CHECK: fir.if %{{.*}} {
!CHECK: %[[C_PVT_ALLOC:.*]] = fir.allocmem !fir.array<?x!fir.char<1,?>>(%{{.*}} : index), %{{.*}} {fir.must_be_heap = true, uniq_name = "_QFtest_allocatable_string_arrayEc.alloc"}
!CHECK: %[[C_PVT_BOX:.*]] = fir.embox %[[C_PVT_ALLOC]](%{{.*}}) typeparams %{{.*}} : (!fir.heap<!fir.array<?x!fir.char<1,?>>>, !fir.shapeshift<1>, index) -> !fir.box<!fir.heap<!fir.array<?x!fir.char<1,?>>>>
!CHECK: fir.store %[[C_PVT_BOX]] to %[[C_PVT_BOX_REF]] : !fir.ref<!fir.box<!fir.heap<!fir.array<?x!fir.char<1,?>>>>>
!CHECK: }
!CHECK: %[[C_PVT_DECL:.*]]:2 = hlfir.declare %[[C_PVT_BOX_REF]] {fortran_attrs = #fir.var_attrs<allocatable>, uniq_name = "_QFtest_allocatable_string_arrayEc"} : (!fir.ref<!fir.box<!fir.heap<!fir.array<?x!fir.char<1,?>>>>>) -> (!fir.ref<!fir.box<!fir.heap<!fir.array<?x!fir.char<1,?>>>>>, !fir.ref<!fir.box<!fir.heap<!fir.array<?x!fir.char<1,?>>>>>)
-!CHECK: %{{.*}} = fir.load %[[C_PVT_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<!fir.array<?x!fir.char<1,?>>>>>
+!CHECK: %{{.*}} = fir.load %[[C_PVT_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<!fir.array<?x!fir.char<1,?>>>>>
!CHECK: fir.if %{{.*}} {
-!CHECK: %[[C_PVT_BOX:.*]] = fir.load %[[C_PVT_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<!fir.array<?x!fir.char<1,?>>>>>
+!CHECK: %[[C_PVT_BOX:.*]] = fir.load %[[C_PVT_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<!fir.array<?x!fir.char<1,?>>>>>
!CHECK: %[[C_PVT_ADDR:.*]] = fir.box_addr %[[C_PVT_BOX]] : (!fir.box<!fir.heap<!fir.array<?x!fir.char<1,?>>>>) -> !fir.heap<!fir.array<?x!fir.char<1,?>>>
!CHECK: fir.freemem %[[C_PVT_ADDR]] : !fir.heap<!fir.array<?x!fir.char<1,?>>>
!CHECK: }
diff --git a/flang/test/Lower/OpenMP/parallel-private-clause.f90 b/flang/test/Lower/OpenMP/parallel-private-clause.f90
index 3e46d315f8cc47..5578b6710da7cd 100644
--- a/flang/test/Lower/OpenMP/parallel-private-clause.f90
+++ b/flang/test/Lower/OpenMP/parallel-private-clause.f90
@@ -150,8 +150,8 @@ subroutine private_clause_derived_type()
!FIRDialect-DAG: %[[X4_PVT:.*]] = fir.alloca !fir.box<!fir.heap<!fir.array<?xi32>>> {bindc_name = "x4", pinned, uniq_name = "{{.*}}Ex4"}
!FIRDialect-DAG: %[[X4_PVT_DECL:.*]]:2 = hlfir.declare %[[X4_PVT]] {fortran_attrs = #fir.var_attrs<allocatable>, uniq_name = "{{.*}}Ex4"} : (!fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>) -> (!fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>, !fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>)
-!FIRDialect-DAG: %[[TMP58:.*]] = fir.load %[[X4_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>
-!FIRDialect-DAG: %[[TMP97:.*]] = fir.load %[[X4_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>
+!FIRDialect-DAG: %[[TMP58:.*]] = fir.load %[[X4_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>
+!FIRDialect-DAG: %[[TMP97:.*]] = fir.load %[[X4_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>
!FIRDialect-DAG: %[[TMP98:.*]]:3 = fir.box_dims %[[TMP97]], {{.*}} : (!fir.box<!fir.heap<!fir.array<?xi32>>>, index) -> (index, index, index)
!FIRDialect-DAG: %[[TMP101:.*]] = fir.allocmem !fir.array<?xi32>, {{.*}} {fir.must_be_heap = true, uniq_name = "{{.*}}Ex4.alloc"}
@@ -192,12 +192,12 @@ subroutine private_clause_allocatable()
!FIRDialect-DAG: }
!FIRDialect-DAG: %[[X5_PVT_DECL:.*]]:2 = hlfir.declare %[[X5_PVT]] {fortran_attrs = #fir.var_attrs<allocatable>, uniq_name = "_QFprivate_clause_real_call_allocatableEx5"} : (!fir.ref<!fir.box<!fir.heap<f32>>>) -> (!fir.ref<!fir.box<!fir.heap<f32>>>, !fir.ref<!fir.box<!fir.heap<f32>>>)
!FIRDialect-DAG: fir.call @_QFprivate_clause_real_call_allocatablePhelper_private_clause_real_call_allocatable(%[[X5_PVT_DECL]]#0) fastmath<contract> : (!fir.ref<!fir.box<!fir.heap<f32>>>) -> ()
-!FIRDialect-DAG: %{{.*}} = fir.load %[[X5_PVT_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<f32>>>
+!FIRDialect-DAG: %{{.*}} = fir.load %[[X5_PVT_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<f32>>>
!FIRDialect-DAG: fir.if %{{.*}} {
-!FIRDialect-DAG: %{{.*}} = fir.load %[[X5_PVT_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<f32>>>
+!FIRDialect-DAG: %{{.*}} = fir.load %[[X5_PVT_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<f32>>>
-!FIRDialect-DAG: fir.store %{{.*}} to %[[X5_PVT_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<f32>>>
+!FIRDialect-DAG: fir.store %{{.*}} to %[[X5_PVT_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<f32>>>
!FIRDialect-DAG: }
!FIRDialect-DAG: omp.terminator
!FIRDialect-DAG: }
@@ -313,12 +313,12 @@ subroutine simple_loop_1
print*, i
end do
! FIRDialect: omp.yield
- ! FIRDialect: {{%.*}} = fir.load %[[R_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<f32>>>
+ ! FIRDialect: {{%.*}} = fir.load %[[R_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<f32>>>
! FIRDialect: fir.if {{%.*}} {
- ! FIRDialect: [[LD:%.*]] = fir.load %[[R_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<f32>>>
+ ! FIRDialect: [[LD:%.*]] = fir.load %[[R_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<f32>>>
! FIRDialect: [[AD:%.*]] = fir.box_addr [[LD]] : (!fir.box<!fir.heap<f32>>) -> !fir.heap<f32>
! FIRDialect: fir.freemem [[AD]] : !fir.heap<f32>
- ! FIRDialect: fir.store {{%.*}} to %[[R_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<f32>>>
+ ! FIRDialect: fir.store {{%.*}} to %[[R_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<f32>>>
!$OMP END DO
! FIRDialect: omp.terminator
!$OMP END PARALLEL
@@ -351,12 +351,12 @@ subroutine simple_loop_2
print*, i
end do
! FIRDialect: omp.yield
- ! FIRDialect: {{%.*}} = fir.load %[[R_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<f32>>>
+ ! FIRDialect: {{%.*}} = fir.load %[[R_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<f32>>>
! FIRDialect: fir.if {{%.*}} {
- ! FIRDialect: [[LD:%.*]] = fir.load %[[R_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<f32>>>
+ ! FIRDialect: [[LD:%.*]] = fir.load %[[R_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<f32>>>
! FIRDialect: [[AD:%.*]] = fir.box_addr [[LD]] : (!fir.box<!fir.heap<f32>>) -> !fir.heap<f32>
! FIRDialect: fir.freemem [[AD]] : !fir.heap<f32>
- ! FIRDialect: fir.store {{%.*}} to %[[R_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<f32>>>
+ ! FIRDialect: fir.store {{%.*}} to %[[R_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<f32>>>
!$OMP END DO
! FIRDialect: omp.terminator
!$OMP END PARALLEL
@@ -388,12 +388,12 @@ subroutine simple_loop_3
print*, i
end do
! FIRDialect: omp.yield
- ! FIRDialect: {{%.*}} = fir.load [[R_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<f32>>>
+ ! FIRDialect: {{%.*}} = fir.load [[R_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<f32>>>
! FIRDialect: fir.if {{%.*}} {
- ! FIRDialect: [[LD:%.*]] = fir.load [[R_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<f32>>>
+ ! FIRDialect: [[LD:%.*]] = fir.load [[R_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<f32>>>
! FIRDialect: [[AD:%.*]] = fir.box_addr [[LD]] : (!fir.box<!fir.heap<f32>>) -> !fir.heap<f32>
! FIRDialect: fir.freemem [[AD]] : !fir.heap<f32>
- ! FIRDialect: fir.store {{%.*}} to [[R_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<f32>>>
+ ! FIRDialect: fir.store {{%.*}} to [[R_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<f32>>>
!$OMP END PARALLEL DO
! FIRDialect: omp.terminator
end subroutine
@@ -421,10 +421,10 @@ subroutine simd_loop_1
end do
!$OMP END SIMD
! FIRDialect: omp.yield
- ! FIRDialect: {{%.*}} = fir.load [[R_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<f32>>>
+ ! FIRDialect: {{%.*}} = fir.load [[R_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<f32>>>
! FIRDialect: fir.if {{%.*}} {
- ! FIRDialect: [[LD:%.*]] = fir.load [[R_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<f32>>>
+ ! FIRDialect: [[LD:%.*]] = fir.load [[R_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<f32>>>
! FIRDialect: [[AD:%.*]] = fir.box_addr [[LD]] : (!fir.box<!fir.heap<f32>>) -> !fir.heap<f32>
! FIRDialect: fir.freemem [[AD]] : !fir.heap<f32>
- ! FIRDialect: fir.store {{%.*}} to [[R_DECL]]#1 : !fir.ref<!fir.box<!fir.heap<f32>>>
+ ! FIRDialect: fir.store {{%.*}} to [[R_DECL]]#0 : !fir.ref<!fir.box<!fir.heap<f32>>>
end subroutine
|
|
✅ With the latest revision this PR passed the C/C++ code formatter. |
ergawy
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Modifies the privatization logic so that the emitted code only used the HLFIR base (i.e. SSA value `#0` returned from `hlfir.declare`). Before that, that emitted privatization logic was a mix of using `#0` and `llvm#1` which leads to some difficulties trying to move to delayed privatization (see the discussion on llvm#84033).
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ergawy
changed the title
|
@kiranchandramohan @jeanPerier this is the most local solution I could find to apply what we discussed to privatization logic. I think modifying
Hopefully this is a step in good direction. Also, I am happy to help in general with cleaning up references to |
|
Your solution looks acceptable to me. In the future, the clone creation could be based on HLFIR helpers (like hlfir::createTempFromMold) using #0 instead of going to the fir::ExtendedValue level and having custom code in the bridge. But these helpers may not do exactly what is needed for OpenMP currently (e.g, they will use allocmem for arrays, while the clone code creates allocas).
In the case where from the following FIR (-emit-fir of the loop body): to Because To be fair, LLVM with optimizations enabled does a good job at removing the temporary descriptors and replacing the byte stride addressing in the simple cases where it can see the descriptor creation. But I would not jump on changing this without a great confidence that increasing the descriptor usages in FIR operations (as opposed to HLFIR) won't be a problem for more complex optimizations and programs. |
jeanPerier
approved these changes
Mar 11, 2024
ergawy
changed the title
|
Thanks for the approval and for explaining some of the intricacies in this. |
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Modifies the privatization logic so that the emitted code only used the
HLFIR base (i.e. SSA value
#0returned fromhlfir.declare). Beforethat, that emitted privatization logic was a mix of using
#0and#1which leads to some difficulties trying to move to delayed privatization
(see the discussion on #84033).