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[flang][hlfir] address char_convert issues as mentioned in #64315 #67570

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Oct 9, 2023
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[flang][hlfir] address char_convert issues as mentioned in #64315 #67570

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9 changes: 6 additions & 3 deletions flang/lib/Lower/ConvertExprToHLFIR.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1414,7 +1414,6 @@ struct UnaryOp<
hlfir::Entity lhs) {
if constexpr (TC1 == Fortran::common::TypeCategory::Character &&
TC2 == TC1) {
// TODO(loc, "character conversion in HLFIR");
auto kindMap = builder.getKindMap();
mlir::Type fromTy = lhs.getFortranElementType();
mlir::Value origBufferSize = genCharLength(loc, builder, lhs);
Expand All @@ -1435,8 +1434,12 @@ struct UnaryOp<
// allocate space on the stack for toBuffer
auto dest = builder.create<fir::AllocaOp>(loc, toTy,
mlir::ValueRange{bufferSize});
builder.create<fir::CharConvertOp>(loc, lhs.getFirBase(), origBufferSize,
dest);
auto src = hlfir::convertToAddress(loc, builder, lhs,
lhs.getFortranElementType());
builder.create<fir::CharConvertOp>(loc, src.first.getCharBox()->getAddr(),
origBufferSize, dest);
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if (src.second.has_value())
src.second.value()();

return hlfir::EntityWithAttributes{builder.create<hlfir::DeclareOp>(
loc, dest, "ctor.temp", /*shape=*/nullptr,
Expand Down
71 changes: 71 additions & 0 deletions flang/test/Lower/HLFIR/charconvert.f90
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Original file line number Diff line number Diff line change
@@ -0,0 +1,71 @@
! Test lowering of character concatenation to HLFIR
! RUN: bbc -emit-hlfir -o - %s 2>&1 | FileCheck %s

subroutine charconvert1(c,n)
character(*,4),intent(in) :: c(:)
integer,intent(in) :: n
interface
subroutine callee(c)
character(*),intent(in) :: c(:)
end subroutine callee
end interface
call show([character(n)::c])
end subroutine charconvert1

! CHECK-LABEL: func.func @_QPcharconvert1
! CHECK: %[[VAL_2:.*]]:2 = hlfir.declare %{{.*}} {fortran_attrs = #fir.var_attrs<intent_in>, uniq_name = "_QFcharconvert1Ec"} : (!fir.box<!fir.array<?x!fir.char<4,?>>>) -> (!fir.box<!fir.array<?x!fir.char<4,?>>>, !fir.box<!fir.array<?x!fir.char<4,?>>>)
! CHECK: ^bb0(%[[ARG2:.*]]: index):
! CHECK: %[[VAL_37:.*]] = fir.box_elesize %[[VAL_2]]#1 : (!fir.box<!fir.array<?x!fir.char<4,?>>>) -> index
! CHECK: %[[C4_4:.*]] = arith.constant 4 : index
! CHECK: %[[VAL_38:.*]] = arith.divsi %[[VAL_37]], %[[C4_4]] : index
! CHECK: %[[VAL_39:.*]] = hlfir.designate %[[VAL_2]]#0 (%[[ARG2]]) typeparams %[[VAL_38]] : (!fir.box<!fir.array<?x!fir.char<4,?>>>, index, index) -> !fir.boxchar<4>
! CHECK: %[[C4_5:.*]] = arith.constant 4 : index
! CHECK: %[[VAL_40:.*]] = arith.muli %[[VAL_38]], %[[C4_5]] : index
! CHECK: %[[VAL_41:.*]] = fir.alloca !fir.char<1,?>(%[[VAL_40]] : index)
! CHECK: %[[VAL_42:.*]]:2 = fir.unboxchar %[[VAL_39]] : (!fir.boxchar<4>) -> (!fir.ref<!fir.char<4,?>>, index)
! CHECK: fir.char_convert %[[VAL_42]]#0 for %[[VAL_38:.*]] to %[[VAL_41]] : !fir.ref<!fir.char<4,?>>, index, !fir.ref<!fir.char<1,?>>

subroutine charconvert2(x)
integer,intent(in) :: x
character(kind=4) :: cx
cx = achar(x)
end subroutine charconvert2
! CHECK-LABEL: func.func @_QPcharconvert2
! CHECK-SAME: %[[ARG0:.*]]: !fir.ref<i32>
! CHECK: %[[VAL_0:.*]] = fir.alloca !fir.char<1>
! CHECK: %[[C1:.*]] = arith.constant 1 : index
! CHECK: %[[VAL_1:.*]] = fir.alloca !fir.char<4> {bindc_name = "cx", uniq_name = "_QFcharconvert2Ecx"}
! CHECK: %[[VAL_2:.*]]:2 = hlfir.declare %[[VAL_1]] typeparams %[[C1]] {uniq_name = "_QFcharconvert2Ecx"} : (!fir.ref<!fir.char<4>>, index) -> (!fir.ref<!fir.char<4>>, !fir.ref<!fir.char<4>>)
! CHECK: %[[VAL_3:.*]]:2 = hlfir.declare %[[ARG0]] {fortran_attrs = #fir.var_attrs<intent_in>, uniq_name = "_QFcharconvert2Ex"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
! CHECK: %[[VAL_4:.*]] = fir.load %[[VAL_3]]#0 : !fir.ref<i32>
! CHECK: %[[VAL_5:.*]] = fir.convert %[[VAL_4]] : (i32) -> i64
! CHECK: %[[VAL_6:.*]] = fir.convert %[[VAL_5]] : (i64) -> i8
! CHECK: %[[VAL_7:.*]] = fir.undefined !fir.char<1>
! CHECK: %[[VAL_8:.*]] = fir.insert_value %[[VAL_7]], %[[VAL_6]], [0 : index] : (!fir.char<1>, i8) -> !fir.char<1>
! CHECK: fir.store %[[VAL_8:.*]] to %[[VAL_0]] : !fir.ref<!fir.char<1>>
! CHECK: %[[FALSE:.*]] = arith.constant false
! CHECK: %[[VAL_9:.*]] = hlfir.as_expr %[[VAL_0]] move %[[FALSE]] : (!fir.ref<!fir.char<1>>, i1) -> !hlfir.expr<!fir.char<1>>
! CHECK: %[[C1_0:.*]] = arith.constant 1 : index
! CHECK: %[[VAL_10:.*]] = fir.alloca !fir.char<4,?>(%[[C1_0]] : index)
! CHECK: fir.char_convert %[[VAL_0:.*]] for %[[C1_0]] to %[[VAL_10]] : !fir.ref<!fir.char<1>>, index, !fir.ref<!fir.char<4,?>>

subroutine charconvert3(c, c4)
character(kind=1, len=*) :: c
character(kind=4, len=*) :: c4
c4 = c // c
end subroutine

! CHECK-LABEL: func.func @_QPcharconvert3
! CHECK-SAME: %[[ARG0:.*]]: !fir.boxchar<1> {{.*}}, %[[ARG1:.*]]: !fir.boxchar<4>
! CHECK: %[[VAL_0:.*]]:2 = fir.unboxchar %[[ARG0]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
! CHECK: %[[VAL_1:.*]]:2 = hlfir.declare %[[VAL_0]]#0 typeparams %[[VAL_0]]#1 {uniq_name = "_QFcharconvert3Ec"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
! CHECK: %[[VAL_2:.*]]:2 = fir.unboxchar %[[ARG1]] : (!fir.boxchar<4>) -> (!fir.ref<!fir.char<4,?>>, index)
! CHECK: %[[VAL_3:.*]]:2 = hlfir.declare %[[VAL_2]]#0 typeparams %[[VAL_2]]#1 {uniq_name = "_QFcharconvert3Ec4"} : (!fir.ref<!fir.char<4,?>>, index) -> (!fir.boxchar<4>, !fir.ref<!fir.char<4,?>>)
! CHECK: %[[VAL_4:.*]] = arith.addi %[[VAL_0]]#1, %[[VAL_0]]#1 : index
! CHECK: %[[VAL_5:.*]] = hlfir.concat %[[VAL_1]]#0, %[[VAL_1]]#0 len %[[VAL_4]] : (!fir.boxchar<1>, !fir.boxchar<1>, index) -> !hlfir.expr<!fir.char<1,?>>
! CHECK: %[[VAL_6:.*]] = fir.alloca !fir.char<4,?>(%[[VAL_4]] : index)
! CHECK: %[[VAL_7:.*]]:3 = hlfir.associate %[[VAL_5]] typeparams %[[VAL_4]] {uniq_name = "adapt.valuebyref"} : (!hlfir.expr<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>, i1)
! CHECK: fir.char_convert %[[VAL_7]]#1 for %[[VAL_4:.*]] to %[[VAL_6]] : !fir.ref<!fir.char<1,?>>, index, !fir.ref<!fir.char<4,?>>
! CHECK: hlfir.end_associate %[[VAL_7]]#1, %[[VAL_7]]#2 : !fir.ref<!fir.char<1,?>>, i1
! CHECK: %[[VAL_8:.*]]:2 = hlfir.declare %[[VAL_6]] typeparams %[[VAL_4]] {uniq_name = "ctor.temp"} : (!fir.ref<!fir.char<4,?>>, index) -> (!fir.boxchar<4>, !fir.ref<!fir.char<4,?>>)
! CHECK: hlfir.assign %[[VAL_8]]#0 to %[[VAL_3]]#0 : !fir.boxchar<4>, !fir.boxchar<4>
9 changes: 1 addition & 8 deletions flang/test/Lower/charconvert.f90
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Expand Up @@ -19,10 +19,6 @@ subroutine test_c4_to_c1(c4, c1)
! CHECK: %[[VAL_3:.*]]:2 = hlfir.declare %[[VAL_2]]#0 typeparams %[[VAL_2]]#1 {uniq_name = "_QFtest_c1_to_c4Ec4"} : (!fir.ref<!fir.char<4,?>>, index) -> (!fir.boxchar<4>, !fir.ref<!fir.char<4,?>>)
! CHECK: %[[VAL_4:.*]] = fir.alloca !fir.char<4,?>(%[[VAL_0]]#1 : index)
! CHECK: fir.char_convert %[[VAL_1]]#1 for %[[VAL_0]]#1 to %[[VAL_4:.*]] : !fir.ref<!fir.char<1,?>>, index, !fir.ref<!fir.char<4,?>>
! CHECK: %[[VAL_5:.*]]:2 = hlfir.declare %[[VAL_4]] typeparams %[[VAL_0]]#1 {uniq_name = "ctor.temp"} : (!fir.ref<!fir.char<4,?>>, index) -> (!fir.boxchar<4>, !fir.ref<!fir.char<4,?>>)
! CHECK: hlfir.assign %[[VAL_5]]#0 to %[[VAL_3]]#0 : !fir.boxchar<4>, !fir.boxchar<4>
! CHECK: return
! CHECK: }

! CHECK: func.func @_QPtest_c4_to_c1(%[[ARG0:.*]]: !fir.boxchar<4> {fir.bindc_name = "c4"}, %[[ARG1:.*]]: !fir.boxchar<1> {fir.bindc_name = "c1"}) {
! CHECK: %[[VAL_0:.*]]:2 = fir.unboxchar %[[ARG1]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
Expand All @@ -33,7 +29,4 @@ subroutine test_c4_to_c1(c4, c1)
! CHECK: %[[VAL_4:.*]] = arith.muli %[[VAL_2]]#1, %[[C4]] : index
! CHECK: %[[VAL_5:.*]] = fir.alloca !fir.char<1,?>(%[[VAL_4]] : index)
! CHECK: fir.char_convert %[[VAL_3]]#1 for %[[VAL_2]]#1 to %[[VAL_5:.*]] : !fir.ref<!fir.char<4,?>>, index, !fir.ref<!fir.char<1,?>>
! CHECK: %[[VAL_6:.*]]:2 = hlfir.declare %[[VAL_5]] typeparams %[[VAL_2]]#1 {uniq_name = "ctor.temp"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
! CHECK: hlfir.assign %[[VAL_6]]#0 to %[[VAL_1]]#0 : !fir.boxchar<1>, !fir.boxchar<1>
! CHECK: return
! CHECK: }
! CHECK: %[[VAL_6:.*]]:2 = hlfir.declare %[[VAL_5]] typeparams %[[VAL_2]]#1 {uniq_name = "ctor.temp"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)