[flang-commits] [flang] f8843ef - [flang][hlfir] Lower Cray pointee references. (#65563)
via flang-commits
flang-commits at lists.llvm.org
Thu Sep 7 11:41:27 PDT 2023
Author: Slava Zakharin
Date: 2023-09-07T11:41:22-07:00
New Revision: f8843efbb2190db85c696001ffd6211a2c20ac37
URL: https://github.com/llvm/llvm-project/commit/f8843efbb2190db85c696001ffd6211a2c20ac37
DIFF: https://github.com/llvm/llvm-project/commit/f8843efbb2190db85c696001ffd6211a2c20ac37.diff
LOG: [flang][hlfir] Lower Cray pointee references. (#65563)
A Cray pointee reference must be done using the characteristics
(bounds, type params) of the original pointee declaration, but
using the actual address value of the associated Cray pointer.
There might be multiple Cray pointees associated with the same
Cray pointer.
The proposed solution is to lower each Cray pointee into a POINTER
variable with a descriptor. The descriptor is initialized at the point
of declaration of the pointee, though its base_addr is set to null.
Before each reference of the Cray pointee its descriptor's base_addr
is updated to the current value of the Cray pointer.
The update of the base_addr is done using PointerAssociateScalar
runtime call, which just updates the base_addr of the descriptor.
This is a temporary solution just to make Cray pointers work
to the same extent they work with FIR lowering.
Added:
flang/include/flang/Optimizer/Builder/Runtime/Pointer.h
flang/lib/Optimizer/Builder/Runtime/Pointer.cpp
flang/test/Lower/HLFIR/cray-pointers.f90
Modified:
flang/include/flang/Lower/ConvertExpr.h
flang/include/flang/Lower/ConvertVariable.h
flang/lib/Lower/Bridge.cpp
flang/lib/Lower/ConvertExpr.cpp
flang/lib/Lower/ConvertExprToHLFIR.cpp
flang/lib/Lower/ConvertVariable.cpp
flang/lib/Optimizer/Builder/CMakeLists.txt
Removed:
################################################################################
diff --git a/flang/include/flang/Lower/ConvertExpr.h b/flang/include/flang/Lower/ConvertExpr.h
index 64a18092014c6cb..386a0d4fa59febf 100644
--- a/flang/include/flang/Lower/ConvertExpr.h
+++ b/flang/include/flang/Lower/ConvertExpr.h
@@ -234,7 +234,6 @@ inline mlir::NamedAttribute getAdaptToByRefAttr(fir::FirOpBuilder &builder) {
builder.getUnitAttr()};
}
-Fortran::semantics::SymbolRef getPointer(Fortran::semantics::SymbolRef sym);
mlir::Value addCrayPointerInst(mlir::Location loc, fir::FirOpBuilder &builder,
mlir::Value ptrVal, mlir::Type ptrTy,
mlir::Type pteTy);
diff --git a/flang/include/flang/Lower/ConvertVariable.h b/flang/include/flang/Lower/ConvertVariable.h
index 88e5e523045a192..da7daef59ecde9e 100644
--- a/flang/include/flang/Lower/ConvertVariable.h
+++ b/flang/include/flang/Lower/ConvertVariable.h
@@ -125,5 +125,9 @@ void genDeclareSymbol(Fortran::lower::AbstractConverter &converter,
const Fortran::semantics::Symbol &sym,
const fir::ExtendedValue &exv, bool force = false);
+/// For the given Cray pointee symbol return the corresponding
+/// Cray pointer symbol. Assert if the pointer symbol cannot be found.
+Fortran::semantics::SymbolRef getCrayPointer(Fortran::semantics::SymbolRef sym);
+
} // namespace Fortran::lower
#endif // FORTRAN_LOWER_CONVERT_VARIABLE_H
diff --git a/flang/include/flang/Optimizer/Builder/Runtime/Pointer.h b/flang/include/flang/Optimizer/Builder/Runtime/Pointer.h
new file mode 100644
index 000000000000000..507bb9811431121
--- /dev/null
+++ b/flang/include/flang/Optimizer/Builder/Runtime/Pointer.h
@@ -0,0 +1,30 @@
+//===-- Pointer.h - generate pointer runtime API calls-----------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef FORTRAN_OPTIMIZER_BUILDER_RUNTIME_POINTER_H
+#define FORTRAN_OPTIMIZER_BUILDER_RUNTIME_POINTER_H
+
+#include "mlir/IR/Value.h"
+
+namespace mlir {
+class Location;
+} // namespace mlir
+
+namespace fir {
+class FirOpBuilder;
+}
+
+namespace fir::runtime {
+
+/// Generate runtime call to associate \p target address of scalar
+/// with the \p desc pointer descriptor.
+void genPointerAssociateScalar(fir::FirOpBuilder &builder, mlir::Location loc,
+ mlir::Value desc, mlir::Value target);
+
+} // namespace fir::runtime
+#endif // FORTRAN_OPTIMIZER_BUILDER_RUNTIME_POINTER_H
diff --git a/flang/lib/Lower/Bridge.cpp b/flang/lib/Lower/Bridge.cpp
index d7dec54c76de5dc..0f86f901d021442 100644
--- a/flang/lib/Lower/Bridge.cpp
+++ b/flang/lib/Lower/Bridge.cpp
@@ -3629,7 +3629,7 @@ class FirConverter : public Fortran::lower::AbstractConverter {
sym->Rank() == 0) {
// get the corresponding Cray pointer
- auto ptrSym = Fortran::lower::getPointer(*sym);
+ auto ptrSym = Fortran::lower::getCrayPointer(*sym);
fir::ExtendedValue ptr =
getSymbolExtendedValue(ptrSym, nullptr);
mlir::Value ptrVal = fir::getBase(ptr);
diff --git a/flang/lib/Lower/ConvertExpr.cpp b/flang/lib/Lower/ConvertExpr.cpp
index 191319c8ea3bbd5..a9298be5532d905 100644
--- a/flang/lib/Lower/ConvertExpr.cpp
+++ b/flang/lib/Lower/ConvertExpr.cpp
@@ -863,7 +863,7 @@ class ScalarExprLowering {
addr);
} else if (sym->test(Fortran::semantics::Symbol::Flag::CrayPointee)) {
// get the corresponding Cray pointer
- auto ptrSym = Fortran::lower::getPointer(sym);
+ auto ptrSym = Fortran::lower::getCrayPointer(sym);
ExtValue ptr = gen(ptrSym);
mlir::Value ptrVal = fir::getBase(ptr);
mlir::Type ptrTy = converter.genType(*ptrSym);
@@ -1571,7 +1571,7 @@ class ScalarExprLowering {
auto baseSym = getFirstSym(aref);
if (baseSym.test(Fortran::semantics::Symbol::Flag::CrayPointee)) {
// get the corresponding Cray pointer
- auto ptrSym = Fortran::lower::getPointer(baseSym);
+ auto ptrSym = Fortran::lower::getCrayPointer(baseSym);
fir::ExtendedValue ptr = gen(ptrSym);
mlir::Value ptrVal = fir::getBase(ptr);
@@ -6974,7 +6974,7 @@ class ArrayExprLowering {
ComponentPath &components) {
mlir::Value ptrVal = nullptr;
if (x.test(Fortran::semantics::Symbol::Flag::CrayPointee)) {
- auto ptrSym = Fortran::lower::getPointer(x);
+ auto ptrSym = Fortran::lower::getCrayPointer(x);
ExtValue ptr = converter.getSymbolExtendedValue(ptrSym);
ptrVal = fir::getBase(ptr);
}
@@ -7629,19 +7629,6 @@ void Fortran::lower::createArrayMergeStores(
esp.incrementCounter();
}
-Fortran::semantics::SymbolRef
-Fortran::lower::getPointer(Fortran::semantics::SymbolRef sym) {
- assert(!sym->owner().crayPointers().empty() &&
- "empty Cray pointer/pointee map");
- for (const auto &[pointee, pointer] : sym->owner().crayPointers()) {
- if (pointee == sym->name()) {
- Fortran::semantics::SymbolRef v{pointer.get()};
- return v;
- }
- }
- llvm_unreachable("corresponding Cray pointer cannot be found");
-}
-
mlir::Value Fortran::lower::addCrayPointerInst(mlir::Location loc,
fir::FirOpBuilder &builder,
mlir::Value ptrVal,
diff --git a/flang/lib/Lower/ConvertExprToHLFIR.cpp b/flang/lib/Lower/ConvertExprToHLFIR.cpp
index 7305215c39b9a91..ee4d307b2afbd7b 100644
--- a/flang/lib/Lower/ConvertExprToHLFIR.cpp
+++ b/flang/lib/Lower/ConvertExprToHLFIR.cpp
@@ -28,6 +28,7 @@
#include "flang/Optimizer/Builder/MutableBox.h"
#include "flang/Optimizer/Builder/Runtime/Character.h"
#include "flang/Optimizer/Builder/Runtime/Derived.h"
+#include "flang/Optimizer/Builder/Runtime/Pointer.h"
#include "flang/Optimizer/Builder/Todo.h"
#include "flang/Optimizer/HLFIR/HLFIROps.h"
#include "llvm/ADT/TypeSwitch.h"
@@ -268,8 +269,36 @@ class HlfirDesignatorBuilder {
fir::FortranVariableOpInterface
gen(const Fortran::evaluate::SymbolRef &symbolRef) {
if (std::optional<fir::FortranVariableOpInterface> varDef =
- getSymMap().lookupVariableDefinition(symbolRef))
+ getSymMap().lookupVariableDefinition(symbolRef)) {
+ if (symbolRef->test(Fortran::semantics::Symbol::Flag::CrayPointee)) {
+ // The pointee is represented with a descriptor inheriting
+ // the shape and type parameters of the pointee.
+ // We have to update the base_addr to point to the current
+ // value of the Cray pointer variable.
+ fir::FirOpBuilder &builder = getBuilder();
+ fir::FortranVariableOpInterface ptrVar =
+ gen(Fortran::lower::getCrayPointer(symbolRef));
+ mlir::Value ptrAddr = ptrVar.getBase();
+
+ // Reinterpret the reference to a Cray pointer so that
+ // we have a pointer-compatible value after loading
+ // the Cray pointer value.
+ mlir::Type refPtrType = builder.getRefType(
+ fir::PointerType::get(fir::dyn_cast_ptrEleTy(ptrAddr.getType())));
+ mlir::Value cast = builder.createConvert(loc, refPtrType, ptrAddr);
+ mlir::Value ptrVal = builder.create<fir::LoadOp>(loc, cast);
+
+ // Update the base_addr to the value of the Cray pointer.
+ // This is a hacky way to do the update, and it may harm
+ // performance around Cray pointer references.
+ // TODO: we should introduce an operation that updates
+ // just the base_addr of the given box. The CodeGen
+ // will just convert it into a single store.
+ fir::runtime::genPointerAssociateScalar(builder, loc, varDef->getBase(),
+ ptrVal);
+ }
return *varDef;
+ }
TODO(getLoc(), "lowering symbol to HLFIR");
}
diff --git a/flang/lib/Lower/ConvertVariable.cpp b/flang/lib/Lower/ConvertVariable.cpp
index 15731f14557c6c4..726b8489409ecb4 100644
--- a/flang/lib/Lower/ConvertVariable.cpp
+++ b/flang/lib/Lower/ConvertVariable.cpp
@@ -1477,6 +1477,8 @@ static void genDeclareSymbol(Fortran::lower::AbstractConverter &converter,
if (converter.getLoweringOptions().getLowerToHighLevelFIR() &&
!Fortran::semantics::IsProcedure(sym) &&
!sym.detailsIf<Fortran::semantics::CommonBlockDetails>()) {
+ bool isCrayPointee =
+ sym.test(Fortran::semantics::Symbol::Flag::CrayPointee);
fir::FirOpBuilder &builder = converter.getFirOpBuilder();
const mlir::Location loc = genLocation(converter, sym);
mlir::Value shapeOrShift;
@@ -1492,6 +1494,51 @@ static void genDeclareSymbol(Fortran::lower::AbstractConverter &converter,
auto name = converter.mangleName(sym);
fir::FortranVariableFlagsAttr attributes =
Fortran::lower::translateSymbolAttributes(builder.getContext(), sym);
+
+ if (isCrayPointee) {
+ mlir::Type baseType =
+ hlfir::getFortranElementOrSequenceType(base.getType());
+ if (auto seqType = mlir::dyn_cast<fir::SequenceType>(baseType)) {
+ // The pointer box's sequence type must be with unknown shape.
+ llvm::SmallVector<int64_t> shape(seqType.getDimension(),
+ fir::SequenceType::getUnknownExtent());
+ baseType = fir::SequenceType::get(shape, seqType.getEleTy());
+ }
+ fir::BoxType ptrBoxType =
+ fir::BoxType::get(fir::PointerType::get(baseType));
+ mlir::Value boxAlloc = builder.createTemporary(loc, ptrBoxType);
+
+ // Declare a local pointer variable.
+ attributes = fir::FortranVariableFlagsAttr::get(
+ builder.getContext(), fir::FortranVariableFlagsEnum::pointer);
+ auto newBase = builder.create<hlfir::DeclareOp>(
+ loc, boxAlloc, name, /*shape=*/nullptr, lenParams, attributes);
+ mlir::Value nullAddr =
+ builder.createNullConstant(loc, ptrBoxType.getEleTy());
+
+ // If the element type is known-length character, then
+ // EmboxOp does not need the length parameters.
+ if (auto charType = mlir::dyn_cast<fir::CharacterType>(
+ fir::unwrapSequenceType(baseType)))
+ if (!charType.hasDynamicLen())
+ lenParams.clear();
+
+ // Inherit the shape (and maybe length parameters) from the pointee
+ // declaration.
+ mlir::Value initVal =
+ builder.create<fir::EmboxOp>(loc, ptrBoxType, nullAddr, shapeOrShift,
+ /*slice=*/nullptr, lenParams);
+ builder.create<fir::StoreOp>(loc, initVal, newBase.getBase());
+
+ // Any reference to the pointee is going to be using the pointer
+ // box from now on. The base_addr of the descriptor must be updated
+ // to hold the value of the Cray pointer at the point of the pointee
+ // access.
+ // Note that the same Cray pointer may be associated with
+ // multiple pointees and each of them has its own descriptor.
+ symMap.addVariableDefinition(sym, newBase, force);
+ return;
+ }
auto newBase = builder.create<hlfir::DeclareOp>(
loc, base, name, shapeOrShift, lenParams, attributes);
symMap.addVariableDefinition(sym, newBase, force);
@@ -2056,3 +2103,16 @@ void Fortran::lower::createRuntimeTypeInfoGlobal(
mlir::StringAttr linkage = getLinkageAttribute(builder, var);
defineGlobal(converter, var, globalName, linkage);
}
+
+Fortran::semantics::SymbolRef
+Fortran::lower::getCrayPointer(Fortran::semantics::SymbolRef sym) {
+ assert(!sym->owner().crayPointers().empty() &&
+ "empty Cray pointer/pointee map");
+ for (const auto &[pointee, pointer] : sym->owner().crayPointers()) {
+ if (pointee == sym->name()) {
+ Fortran::semantics::SymbolRef v{pointer.get()};
+ return v;
+ }
+ }
+ llvm_unreachable("corresponding Cray pointer cannot be found");
+}
diff --git a/flang/lib/Optimizer/Builder/CMakeLists.txt b/flang/lib/Optimizer/Builder/CMakeLists.txt
index 7665ca10e84bee1..5e5daffd3ed7de9 100644
--- a/flang/lib/Optimizer/Builder/CMakeLists.txt
+++ b/flang/lib/Optimizer/Builder/CMakeLists.txt
@@ -22,6 +22,7 @@ add_flang_library(FIRBuilder
Runtime/Inquiry.cpp
Runtime/Intrinsics.cpp
Runtime/Numeric.cpp
+ Runtime/Pointer.cpp
Runtime/Ragged.cpp
Runtime/Reduction.cpp
Runtime/Stop.cpp
diff --git a/flang/lib/Optimizer/Builder/Runtime/Pointer.cpp b/flang/lib/Optimizer/Builder/Runtime/Pointer.cpp
new file mode 100644
index 000000000000000..160c6515a7a9d62
--- /dev/null
+++ b/flang/lib/Optimizer/Builder/Runtime/Pointer.cpp
@@ -0,0 +1,27 @@
+//===-- Pointer.cpp -- generate pointer runtime API calls------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "flang/Optimizer/Builder/Runtime/Pointer.h"
+#include "flang/Optimizer/Builder/FIRBuilder.h"
+#include "flang/Optimizer/Builder/Runtime/RTBuilder.h"
+#include "flang/Runtime/pointer.h"
+
+using namespace Fortran::runtime;
+
+void fir::runtime::genPointerAssociateScalar(fir::FirOpBuilder &builder,
+ mlir::Location loc,
+ mlir::Value desc,
+ mlir::Value target) {
+ mlir::func::FuncOp func{
+ fir::runtime::getRuntimeFunc<mkRTKey(PointerAssociateScalar)>(loc,
+ builder)};
+ mlir::FunctionType fTy{func.getFunctionType()};
+ llvm::SmallVector<mlir::Value> args{
+ fir::runtime::createArguments(builder, loc, fTy, desc, target)};
+ builder.create<fir::CallOp>(loc, func, args);
+}
diff --git a/flang/test/Lower/HLFIR/cray-pointers.f90 b/flang/test/Lower/HLFIR/cray-pointers.f90
new file mode 100644
index 000000000000000..761fbbad2ccf6b1
--- /dev/null
+++ b/flang/test/Lower/HLFIR/cray-pointers.f90
@@ -0,0 +1,195 @@
+! Test lowering of Cray pointee references.
+! RUN: bbc -emit-hlfir -o - -I nowhere %s 2>&1 | FileCheck %s
+
+
+subroutine test1()
+ real x(10), res
+ pointer (cp, x)
+ res = x(7)
+end subroutine test1
+! CHECK-LABEL: func.func @_QPtest1() {
+! CHECK: %[[VAL_0:.*]] = fir.alloca !fir.box<!fir.ptr<!fir.array<?xf32>>>
+! CHECK: %[[VAL_1:.*]] = fir.alloca i64 {bindc_name = "cp", uniq_name = "_QFtest1Ecp"}
+! CHECK: %[[VAL_2:.*]]:2 = hlfir.declare %[[VAL_1]] {uniq_name = "_QFtest1Ecp"} : (!fir.ref<i64>) -> (!fir.ref<i64>, !fir.ref<i64>)
+! CHECK: %[[VAL_5:.*]] = arith.constant 10 : index
+! CHECK: %[[VAL_7:.*]] = fir.shape %[[VAL_5]] : (index) -> !fir.shape<1>
+! CHECK: %[[VAL_12:.*]]:2 = hlfir.declare %[[VAL_0]] {fortran_attrs = #fir.var_attrs<pointer>, uniq_name = "_QFtest1Ex"} : (!fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>) -> (!fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>, !fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>)
+! CHECK: %[[VAL_13:.*]] = fir.zero_bits !fir.ptr<!fir.array<?xf32>>
+! CHECK: %[[VAL_14:.*]] = fir.embox %[[VAL_13]](%[[VAL_7]]) : (!fir.ptr<!fir.array<?xf32>>, !fir.shape<1>) -> !fir.box<!fir.ptr<!fir.array<?xf32>>>
+! CHECK: fir.store %[[VAL_14]] to %[[VAL_12]]#0 : !fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>
+! CHECK: %[[VAL_15:.*]] = fir.convert %[[VAL_2]]#0 : (!fir.ref<i64>) -> !fir.ref<!fir.ptr<i64>>
+! CHECK: %[[VAL_16:.*]] = fir.load %[[VAL_15]] : !fir.ref<!fir.ptr<i64>>
+! CHECK: %[[VAL_17:.*]] = fir.convert %[[VAL_12]]#0 : (!fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>) -> !fir.ref<!fir.box<none>>
+! CHECK: %[[VAL_18:.*]] = fir.convert %[[VAL_16]] : (!fir.ptr<i64>) -> !fir.llvm_ptr<i8>
+! CHECK: %[[VAL_19:.*]] = fir.call @_FortranAPointerAssociateScalar(%[[VAL_17]], %[[VAL_18]]) fastmath<contract> : (!fir.ref<!fir.box<none>>, !fir.llvm_ptr<i8>) -> none
+! CHECK: %[[VAL_20:.*]] = fir.load %[[VAL_12]]#0 : !fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>
+! CHECK: %[[VAL_21:.*]] = arith.constant 7 : index
+! CHECK: %[[VAL_22:.*]] = hlfir.designate %[[VAL_20]] (%[[VAL_21]]) : (!fir.box<!fir.ptr<!fir.array<?xf32>>>, index) -> !fir.ref<f32>
+
+
+subroutine test2(n)
+ integer n
+ real x
+ pointer (cp, x(3:n))
+ res = x(7)
+end subroutine test2
+! CHECK-LABEL: func.func @_QPtest2(
+! CHECK-SAME: %[[VAL_0:.*]]: !fir.ref<i32> {fir.bindc_name = "n"}) {
+! CHECK: %[[VAL_1:.*]] = fir.alloca !fir.box<!fir.ptr<!fir.array<?xf32>>>
+! CHECK: %[[VAL_2:.*]] = fir.alloca i64 {bindc_name = "cp", uniq_name = "_QFtest2Ecp"}
+! CHECK: %[[VAL_3:.*]]:2 = hlfir.declare %[[VAL_2]] {uniq_name = "_QFtest2Ecp"} : (!fir.ref<i64>) -> (!fir.ref<i64>, !fir.ref<i64>)
+! CHECK: %[[VAL_19:.*]] = fir.shape_shift %{{.*}}, %{{.*}} : (index, index) -> !fir.shapeshift<1>
+! CHECK: %[[VAL_24:.*]]:2 = hlfir.declare %[[VAL_1]] {fortran_attrs = #fir.var_attrs<pointer>, uniq_name = "_QFtest2Ex"} : (!fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>) -> (!fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>, !fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>)
+! CHECK: %[[VAL_25:.*]] = fir.zero_bits !fir.ptr<!fir.array<?xf32>>
+! CHECK: %[[VAL_26:.*]] = fir.embox %[[VAL_25]](%[[VAL_19]]) : (!fir.ptr<!fir.array<?xf32>>, !fir.shapeshift<1>) -> !fir.box<!fir.ptr<!fir.array<?xf32>>>
+! CHECK: fir.store %[[VAL_26]] to %[[VAL_24]]#0 : !fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>
+! CHECK: %[[VAL_27:.*]] = fir.convert %[[VAL_3]]#0 : (!fir.ref<i64>) -> !fir.ref<!fir.ptr<i64>>
+! CHECK: %[[VAL_28:.*]] = fir.load %[[VAL_27]] : !fir.ref<!fir.ptr<i64>>
+! CHECK: %[[VAL_29:.*]] = fir.convert %[[VAL_24]]#0 : (!fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>) -> !fir.ref<!fir.box<none>>
+! CHECK: %[[VAL_30:.*]] = fir.convert %[[VAL_28]] : (!fir.ptr<i64>) -> !fir.llvm_ptr<i8>
+! CHECK: %[[VAL_31:.*]] = fir.call @_FortranAPointerAssociateScalar(%[[VAL_29]], %[[VAL_30]]) fastmath<contract> : (!fir.ref<!fir.box<none>>, !fir.llvm_ptr<i8>) -> none
+! CHECK: %[[VAL_32:.*]] = fir.load %[[VAL_24]]#0 : !fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>
+! CHECK: %[[VAL_33:.*]] = arith.constant 7 : index
+! CHECK: %[[VAL_34:.*]] = hlfir.designate %[[VAL_32]] (%[[VAL_33]]) : (!fir.box<!fir.ptr<!fir.array<?xf32>>>, index) -> !fir.ref<f32>
+! CHECK: %[[VAL_35:.*]] = fir.load %[[VAL_34]] : !fir.ref<f32>
+
+subroutine test3(cp, n)
+ character(len=11) :: c(n:2*n), res
+ pointer (cp, c)
+ res = c(7)
+end subroutine test3
+! CHECK-LABEL: func.func @_QPtest3(
+! CHECK-SAME: %[[VAL_0:.*]]: !fir.ref<i64> {fir.bindc_name = "cp"},
+! CHECK-SAME: %[[VAL_1:.*]]: !fir.ref<i32> {fir.bindc_name = "n"}) {
+! CHECK: %[[VAL_2:.*]] = fir.alloca !fir.box<!fir.ptr<!fir.array<?x!fir.char<1,11>>>>
+! CHECK: %[[VAL_3:.*]]:2 = hlfir.declare %[[VAL_1]] {uniq_name = "_QFtest3En"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
+! CHECK: %[[VAL_4:.*]]:2 = hlfir.declare %[[VAL_0]] {uniq_name = "_QFtest3Ecp"} : (!fir.ref<i64>) -> (!fir.ref<i64>, !fir.ref<i64>)
+! CHECK: %[[VAL_5:.*]] = arith.constant 11 : index
+! CHECK: %[[VAL_8:.*]] = arith.constant 11 : index
+! CHECK: %[[VAL_24:.*]] = fir.shape_shift %{{.*}}, %{{.*}} : (index, index) -> !fir.shapeshift<1>
+! CHECK: %[[VAL_29:.*]]:2 = hlfir.declare %[[VAL_2]] typeparams %[[VAL_8]] {fortran_attrs = #fir.var_attrs<pointer>, uniq_name = "_QFtest3Ec"} : (!fir.ref<!fir.box<!fir.ptr<!fir.array<?x!fir.char<1,11>>>>>, index) -> (!fir.ref<!fir.box<!fir.ptr<!fir.array<?x!fir.char<1,11>>>>>, !fir.ref<!fir.box<!fir.ptr<!fir.array<?x!fir.char<1,11>>>>>)
+! CHECK: %[[VAL_30:.*]] = fir.zero_bits !fir.ptr<!fir.array<?x!fir.char<1,11>>>
+! CHECK: %[[VAL_31:.*]] = fir.embox %[[VAL_30]](%[[VAL_24]]) : (!fir.ptr<!fir.array<?x!fir.char<1,11>>>, !fir.shapeshift<1>) -> !fir.box<!fir.ptr<!fir.array<?x!fir.char<1,11>>>>
+! CHECK: fir.store %[[VAL_31]] to %[[VAL_29]]#0 : !fir.ref<!fir.box<!fir.ptr<!fir.array<?x!fir.char<1,11>>>>>
+! CHECK: %[[VAL_32:.*]] = fir.convert %[[VAL_4]]#0 : (!fir.ref<i64>) -> !fir.ref<!fir.ptr<i64>>
+! CHECK: %[[VAL_33:.*]] = fir.load %[[VAL_32]] : !fir.ref<!fir.ptr<i64>>
+! CHECK: %[[VAL_34:.*]] = fir.convert %[[VAL_29]]#0 : (!fir.ref<!fir.box<!fir.ptr<!fir.array<?x!fir.char<1,11>>>>>) -> !fir.ref<!fir.box<none>>
+! CHECK: %[[VAL_35:.*]] = fir.convert %[[VAL_33]] : (!fir.ptr<i64>) -> !fir.llvm_ptr<i8>
+! CHECK: %[[VAL_36:.*]] = fir.call @_FortranAPointerAssociateScalar(%[[VAL_34]], %[[VAL_35]]) fastmath<contract> : (!fir.ref<!fir.box<none>>, !fir.llvm_ptr<i8>) -> none
+! CHECK: %[[VAL_37:.*]] = fir.load %[[VAL_29]]#0 : !fir.ref<!fir.box<!fir.ptr<!fir.array<?x!fir.char<1,11>>>>>
+! CHECK: %[[VAL_38:.*]] = arith.constant 7 : index
+! CHECK: %[[VAL_39:.*]] = hlfir.designate %[[VAL_37]] (%[[VAL_38]]) typeparams %[[VAL_8]] : (!fir.box<!fir.ptr<!fir.array<?x!fir.char<1,11>>>>, index, index) -> !fir.ref<!fir.char<1,11>>
+
+subroutine test4(n)
+ character(len=n) :: c, res
+ pointer (cp, c)
+ res = c
+end subroutine test4
+! CHECK-LABEL: func.func @_QPtest4(
+! CHECK-SAME: %[[VAL_0:.*]]: !fir.ref<i32> {fir.bindc_name = "n"}) {
+! CHECK: %[[VAL_1:.*]] = fir.alloca !fir.box<!fir.ptr<!fir.char<1,?>>>
+! CHECK: %[[VAL_2:.*]]:2 = hlfir.declare %[[VAL_0]] {uniq_name = "_QFtest4En"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
+! CHECK: %[[VAL_3:.*]] = fir.alloca i64 {bindc_name = "cp", uniq_name = "_QFtest4Ecp"}
+! CHECK: %[[VAL_4:.*]]:2 = hlfir.declare %[[VAL_3]] {uniq_name = "_QFtest4Ecp"} : (!fir.ref<i64>) -> (!fir.ref<i64>, !fir.ref<i64>)
+! CHECK: %[[VAL_5:.*]] = fir.load %[[VAL_2]]#0 : !fir.ref<i32>
+! CHECK: %[[VAL_6:.*]] = arith.constant 0 : i32
+! CHECK: %[[VAL_7:.*]] = arith.cmpi sgt, %[[VAL_5]], %[[VAL_6]] : i32
+! CHECK: %[[VAL_8:.*]] = arith.select %[[VAL_7]], %[[VAL_5]], %[[VAL_6]] : i32
+! CHECK: %[[VAL_13:.*]]:2 = hlfir.declare %[[VAL_1]] typeparams %[[VAL_8]] {fortran_attrs = #fir.var_attrs<pointer>, uniq_name = "_QFtest4Ec"} : (!fir.ref<!fir.box<!fir.ptr<!fir.char<1,?>>>>, i32) -> (!fir.ref<!fir.box<!fir.ptr<!fir.char<1,?>>>>, !fir.ref<!fir.box<!fir.ptr<!fir.char<1,?>>>>)
+! CHECK: %[[VAL_14:.*]] = fir.zero_bits !fir.ptr<!fir.char<1,?>>
+! CHECK: %[[VAL_15:.*]] = fir.embox %[[VAL_14]] typeparams %[[VAL_8]] : (!fir.ptr<!fir.char<1,?>>, i32) -> !fir.box<!fir.ptr<!fir.char<1,?>>>
+! CHECK: fir.store %[[VAL_15]] to %[[VAL_13]]#0 : !fir.ref<!fir.box<!fir.ptr<!fir.char<1,?>>>>
+! CHECK: %[[VAL_22:.*]] = fir.convert %[[VAL_4]]#0 : (!fir.ref<i64>) -> !fir.ref<!fir.ptr<i64>>
+! CHECK: %[[VAL_23:.*]] = fir.load %[[VAL_22]] : !fir.ref<!fir.ptr<i64>>
+! CHECK: %[[VAL_24:.*]] = fir.convert %[[VAL_13]]#0 : (!fir.ref<!fir.box<!fir.ptr<!fir.char<1,?>>>>) -> !fir.ref<!fir.box<none>>
+! CHECK: %[[VAL_25:.*]] = fir.convert %[[VAL_23]] : (!fir.ptr<i64>) -> !fir.llvm_ptr<i8>
+! CHECK: %[[VAL_26:.*]] = fir.call @_FortranAPointerAssociateScalar(%[[VAL_24]], %[[VAL_25]]) fastmath<contract> : (!fir.ref<!fir.box<none>>, !fir.llvm_ptr<i8>) -> none
+! CHECK: %[[VAL_27:.*]] = fir.load %[[VAL_13]]#0 : !fir.ref<!fir.box<!fir.ptr<!fir.char<1,?>>>>
+! CHECK: %[[VAL_28:.*]] = fir.box_addr %[[VAL_27]] : (!fir.box<!fir.ptr<!fir.char<1,?>>>) -> !fir.ptr<!fir.char<1,?>>
+! CHECK: %[[VAL_29:.*]] = fir.emboxchar %[[VAL_28]], %[[VAL_8]] : (!fir.ptr<!fir.char<1,?>>, i32) -> !fir.boxchar<1>
+
+subroutine test5()
+ type t
+ sequence
+ real r
+ integer i
+ end type t
+ type(t) :: v
+ integer res
+ pointer (cp, v(3:11))
+ res = v(7)%i
+end subroutine test5
+! CHECK-LABEL: func.func @_QPtest5() {
+! CHECK: %[[VAL_0:.*]] = fir.alloca !fir.box<!fir.ptr<!fir.array<?x!fir.type<_QFtest5Tt{r:f32,i:i32}>>>>
+! CHECK: %[[VAL_1:.*]] = fir.alloca i64 {bindc_name = "cp", uniq_name = "_QFtest5Ecp"}
+! CHECK: %[[VAL_2:.*]]:2 = hlfir.declare %[[VAL_1]] {uniq_name = "_QFtest5Ecp"} : (!fir.ref<i64>) -> (!fir.ref<i64>, !fir.ref<i64>)
+! CHECK: %[[VAL_5:.*]] = arith.constant 3 : index
+! CHECK: %[[VAL_6:.*]] = arith.constant 9 : index
+! CHECK: %[[VAL_7:.*]] = fir.alloca !fir.array<9x!fir.type<_QFtest5Tt{r:f32,i:i32}>> {bindc_name = "v", uniq_name = "_QFtest5Ev"}
+! CHECK: %[[VAL_8:.*]] = fir.shape_shift %[[VAL_5]], %[[VAL_6]] : (index, index) -> !fir.shapeshift<1>
+! CHECK: %[[VAL_13:.*]]:2 = hlfir.declare %[[VAL_0]] {fortran_attrs = #fir.var_attrs<pointer>, uniq_name = "_QFtest5Ev"} : (!fir.ref<!fir.box<!fir.ptr<!fir.array<?x!fir.type<_QFtest5Tt{r:f32,i:i32}>>>>>) -> (!fir.ref<!fir.box<!fir.ptr<!fir.array<?x!fir.type<_QFtest5Tt{r:f32,i:i32}>>>>>, !fir.ref<!fir.box<!fir.ptr<!fir.array<?x!fir.type<_QFtest5Tt{r:f32,i:i32}>>>>>)
+! CHECK: %[[VAL_14:.*]] = fir.zero_bits !fir.ptr<!fir.array<?x!fir.type<_QFtest5Tt{r:f32,i:i32}>>>
+! CHECK: %[[VAL_15:.*]] = fir.embox %[[VAL_14]](%[[VAL_8]]) : (!fir.ptr<!fir.array<?x!fir.type<_QFtest5Tt{r:f32,i:i32}>>>, !fir.shapeshift<1>) -> !fir.box<!fir.ptr<!fir.array<?x!fir.type<_QFtest5Tt{r:f32,i:i32}>>>>
+! CHECK: fir.store %[[VAL_15]] to %[[VAL_13]]#0 : !fir.ref<!fir.box<!fir.ptr<!fir.array<?x!fir.type<_QFtest5Tt{r:f32,i:i32}>>>>>
+! CHECK: %[[VAL_16:.*]] = fir.convert %[[VAL_2]]#0 : (!fir.ref<i64>) -> !fir.ref<!fir.ptr<i64>>
+! CHECK: %[[VAL_17:.*]] = fir.load %[[VAL_16]] : !fir.ref<!fir.ptr<i64>>
+! CHECK: %[[VAL_18:.*]] = fir.convert %[[VAL_13]]#0 : (!fir.ref<!fir.box<!fir.ptr<!fir.array<?x!fir.type<_QFtest5Tt{r:f32,i:i32}>>>>>) -> !fir.ref<!fir.box<none>>
+! CHECK: %[[VAL_19:.*]] = fir.convert %[[VAL_17]] : (!fir.ptr<i64>) -> !fir.llvm_ptr<i8>
+! CHECK: %[[VAL_20:.*]] = fir.call @_FortranAPointerAssociateScalar(%[[VAL_18]], %[[VAL_19]]) fastmath<contract> : (!fir.ref<!fir.box<none>>, !fir.llvm_ptr<i8>) -> none
+! CHECK: %[[VAL_21:.*]] = fir.load %[[VAL_13]]#0 : !fir.ref<!fir.box<!fir.ptr<!fir.array<?x!fir.type<_QFtest5Tt{r:f32,i:i32}>>>>>
+! CHECK: %[[VAL_22:.*]] = arith.constant 7 : index
+! CHECK: %[[VAL_23:.*]] = hlfir.designate %[[VAL_21]] (%[[VAL_22]]) : (!fir.box<!fir.ptr<!fir.array<?x!fir.type<_QFtest5Tt{r:f32,i:i32}>>>>, index) -> !fir.ref<!fir.type<_QFtest5Tt{r:f32,i:i32}>>
+! CHECK: %[[VAL_24:.*]] = hlfir.designate %[[VAL_23]]{"i"} : (!fir.ref<!fir.type<_QFtest5Tt{r:f32,i:i32}>>) -> !fir.ref<i32>
+! CHECK: %[[VAL_25:.*]] = fir.load %[[VAL_24]] : !fir.ref<i32>
+
+subroutine test6(n)
+ character(len=n) :: c(20), res1
+ real x, res2
+ pointer (cp, c)
+ pointer (cp, x(n:17))
+ res1 = c(9)
+ res2 = x(5)
+end subroutine test6
+! CHECK-LABEL: func.func @_QPtest6(
+! CHECK-SAME: %[[VAL_0:.*]]: !fir.ref<i32> {fir.bindc_name = "n"}) {
+! CHECK: %[[VAL_1:.*]] = fir.alloca !fir.box<!fir.ptr<!fir.array<?xf32>>>
+! CHECK: %[[VAL_2:.*]] = fir.alloca !fir.box<!fir.ptr<!fir.array<?x!fir.char<1,?>>>>
+! CHECK: %[[VAL_3:.*]]:2 = hlfir.declare %[[VAL_0]] {uniq_name = "_QFtest6En"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
+! CHECK: %[[VAL_4:.*]] = fir.alloca i64 {bindc_name = "cp", uniq_name = "_QFtest6Ecp"}
+! CHECK: %[[VAL_5:.*]]:2 = hlfir.declare %[[VAL_4]] {uniq_name = "_QFtest6Ecp"} : (!fir.ref<i64>) -> (!fir.ref<i64>, !fir.ref<i64>)
+! CHECK: %[[VAL_8:.*]] = fir.load %[[VAL_3]]#0 : !fir.ref<i32>
+! CHECK: %[[VAL_9:.*]] = arith.constant 0 : i32
+! CHECK: %[[VAL_10:.*]] = arith.cmpi sgt, %[[VAL_8]], %[[VAL_9]] : i32
+! CHECK: %[[VAL_11:.*]] = arith.select %[[VAL_10]], %[[VAL_8]], %[[VAL_9]] : i32
+! CHECK: %[[VAL_12:.*]] = arith.constant 20 : index
+
+! CHECK: %[[VAL_14:.*]] = fir.shape %[[VAL_12]] : (index) -> !fir.shape<1>
+! CHECK: %[[VAL_20:.*]]:2 = hlfir.declare %[[VAL_2]] typeparams %[[VAL_11]] {fortran_attrs = #fir.var_attrs<pointer>, uniq_name = "_QFtest6Ec"} : (!fir.ref<!fir.box<!fir.ptr<!fir.array<?x!fir.char<1,?>>>>>, i32) -> (!fir.ref<!fir.box<!fir.ptr<!fir.array<?x!fir.char<1,?>>>>>, !fir.ref<!fir.box<!fir.ptr<!fir.array<?x!fir.char<1,?>>>>>)
+! CHECK: %[[VAL_21:.*]] = fir.zero_bits !fir.ptr<!fir.array<?x!fir.char<1,?>>>
+! CHECK: %[[VAL_22:.*]] = fir.embox %[[VAL_21]](%[[VAL_14]]) typeparams %[[VAL_11]] : (!fir.ptr<!fir.array<?x!fir.char<1,?>>>, !fir.shape<1>, i32) -> !fir.box<!fir.ptr<!fir.array<?x!fir.char<1,?>>>>
+! CHECK: fir.store %[[VAL_22]] to %[[VAL_20]]#0 : !fir.ref<!fir.box<!fir.ptr<!fir.array<?x!fir.char<1,?>>>>>
+
+! CHECK: %[[VAL_41:.*]] = fir.shape_shift %{{.*}}, %{{.*}} : (index, index) -> !fir.shapeshift<1>
+! CHECK: %[[VAL_46:.*]]:2 = hlfir.declare %[[VAL_1]] {fortran_attrs = #fir.var_attrs<pointer>, uniq_name = "_QFtest6Ex"} : (!fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>) -> (!fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>, !fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>)
+! CHECK: %[[VAL_47:.*]] = fir.zero_bits !fir.ptr<!fir.array<?xf32>>
+! CHECK: %[[VAL_48:.*]] = fir.embox %[[VAL_47]](%[[VAL_41]]) : (!fir.ptr<!fir.array<?xf32>>, !fir.shapeshift<1>) -> !fir.box<!fir.ptr<!fir.array<?xf32>>>
+! CHECK: fir.store %[[VAL_48]] to %[[VAL_46]]#0 : !fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>
+
+! CHECK: %[[VAL_49:.*]] = fir.convert %[[VAL_5]]#0 : (!fir.ref<i64>) -> !fir.ref<!fir.ptr<i64>>
+! CHECK: %[[VAL_50:.*]] = fir.load %[[VAL_49]] : !fir.ref<!fir.ptr<i64>>
+! CHECK: %[[VAL_51:.*]] = fir.convert %[[VAL_20]]#0 : (!fir.ref<!fir.box<!fir.ptr<!fir.array<?x!fir.char<1,?>>>>>) -> !fir.ref<!fir.box<none>>
+! CHECK: %[[VAL_52:.*]] = fir.convert %[[VAL_50]] : (!fir.ptr<i64>) -> !fir.llvm_ptr<i8>
+! CHECK: %[[VAL_53:.*]] = fir.call @_FortranAPointerAssociateScalar(%[[VAL_51]], %[[VAL_52]]) fastmath<contract> : (!fir.ref<!fir.box<none>>, !fir.llvm_ptr<i8>) -> none
+! CHECK: %[[VAL_54:.*]] = fir.load %[[VAL_20]]#0 : !fir.ref<!fir.box<!fir.ptr<!fir.array<?x!fir.char<1,?>>>>>
+! CHECK: %[[VAL_55:.*]] = arith.constant 9 : index
+! CHECK: %[[VAL_56:.*]] = hlfir.designate %[[VAL_54]] (%[[VAL_55]]) typeparams %[[VAL_11]] : (!fir.box<!fir.ptr<!fir.array<?x!fir.char<1,?>>>>, index, i32) -> !fir.boxchar<1>
+
+! CHECK: %[[VAL_57:.*]] = fir.convert %[[VAL_5]]#0 : (!fir.ref<i64>) -> !fir.ref<!fir.ptr<i64>>
+! CHECK: %[[VAL_58:.*]] = fir.load %[[VAL_57]] : !fir.ref<!fir.ptr<i64>>
+! CHECK: %[[VAL_59:.*]] = fir.convert %[[VAL_46]]#0 : (!fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>) -> !fir.ref<!fir.box<none>>
+! CHECK: %[[VAL_60:.*]] = fir.convert %[[VAL_58]] : (!fir.ptr<i64>) -> !fir.llvm_ptr<i8>
+! CHECK: %[[VAL_61:.*]] = fir.call @_FortranAPointerAssociateScalar(%[[VAL_59]], %[[VAL_60]]) fastmath<contract> : (!fir.ref<!fir.box<none>>, !fir.llvm_ptr<i8>) -> none
+! CHECK: %[[VAL_62:.*]] = fir.load %[[VAL_46]]#0 : !fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>
+! CHECK: %[[VAL_63:.*]] = arith.constant 5 : index
+! CHECK: %[[VAL_64:.*]] = hlfir.designate %[[VAL_62]] (%[[VAL_63]]) : (!fir.box<!fir.ptr<!fir.array<?xf32>>>, index) -> !fir.ref<f32>
+! CHECK: %[[VAL_65:.*]] = fir.load %[[VAL_64]] : !fir.ref<f32>
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