[Flang] Add type conversion for FIR heap type

[kiranchandramohan]

Summary

Convert fir.heap type to its llvm equivalent type (llvm.ptr)

This patch is part of the upstreaming effort from fir-dev branch.

Co-authored-by: Eric Schweitz <[e-mail]>
Co-authored-by: Jean Perier <[e-mail]>

[clementval]

LG.

flang/test/Fir/types-to-llvm.fir

33

Should we make the box check target agnostic? Same for other.

[kiranchandramohan]

Make tests target independent

flang/lib/Optimizer/CodeGen/TypeConverter.h

LLVMTypeConverter(mlir::ModuleOp module)
     // Each conversion should return a value of type mlir::Type.
     addConversion([&](BoxType box) { return convertBoxType(box); });
     addConversion([&](BoxCharType boxchar) {
       LLVM_DEBUG(llvm::dbgs() << "type convert: " << boxchar << '\n');
       return convertType(specifics->boxcharMemoryType(boxchar.getEleTy()));
     });
     addConversion(
         [&](fir::CharacterType charTy) { return convertCharType(charTy); });
+    addConversion([&](HeapType heap) { return convertPointerLike(heap); });
     addConversion([&](fir::LogicalType boolTy) {
       return mlir::IntegerType::get(
           &getContext(), kindMapping.getLogicalBitsize(boolTy.getFKind()));
     });
     addConversion(
         [&](fir::PointerType pointer) { return convertPointerLike(pointer); });
     addConversion(
         [&](fir::RecordType derived) { return convertRecordType(derived); });

flang/test/Fir/types-to-llvm.fir

 // Test reference types `!fir.ref`
 
 func private @foo0(%arg0: !fir.ref<i32>)
 // CHECK-LABEL: foo0
 // CHECK-SAME: !llvm.ptr<i32>
 func private @foo1(%arg0: !fir.ref<!fir.array<10xf32>>)
 // CHECK-LABEL: foo1
 // CHECK-SAME: !llvm.ptr<array<10 x f32>>
+func private @foo2(%arg0: !fir.ref<!fir.box<!fir.heap<!fir.type<_QMs1Ta1{x:i32,y:f32}>>>>)
+// CHECK-LABEL: foo2
+// CHECK-SAME: !llvm.ptr<struct<(ptr<struct<"_QMs1Ta1", (i32, f32)>>, i{{.*}}, i{{.*}}, i{{.*}}, i{{.*}}, i{{.*}}, i{{.*}}, ptr<i{{.*}}>, array<1 x i{{.*}}>)>>
 
 // -----
 
 // Test pointer types `!fir.ptr`
 
 func private @foo0(%arg0: !fir.ptr<i32>)
 // CHECK-LABEL: foo0
 // CHECK-SAME: !llvm.ptr<i32>

 func private @foo2(%arg0: !fir.box<!fir.ref<i64>>)
 // CHECK-LABEL: foo2
 // CHECK-SAME: !llvm.ptr<struct<(ptr<i64>, i{{.*}}, i{{.*}}, i{{.*}}, i{{.*}}, i{{.*}}, i{{.*}})>>
 
 func private @foo3(%arg0: !fir.box<!fir.type<derived{f:f32}>>)
 // CHECK-LABEL: foo3
 // CHECK-SAME: !llvm.ptr<struct<(ptr<struct<"derived", (f32)>>, i{{.*}}, i{{.*}}, i{{.*}}, i{{.*}}, i{{.*}}, i{{.*}}, ptr<i{{.*}}>, array<1 x i{{.*}}>)>>
 
+func private @foo4(%arg0: !fir.box<!fir.heap<!fir.type<_QMs1Ta1{x:i32,y:f32}>>>)
+// CHECK-LABEL: foo4
+// CHECK-SAME: !llvm.ptr<struct<(ptr<struct<"_QMs1Ta1", (i32, f32)>>, i{{.*}}, i{{.*}}, i{{.*}}, i{{.*}}, i{{.*}}, i{{.*}}, ptr<i{{.*}}>, array<1 x i{{.*}}>)>>
+
 // -----
 
 // Test char types `!fir.char<k, n>`
 
 func private @foo0(%arg0: !fir.char<1, 4>, %arg1: !fir.char<1, ?>)
 // CHECK-LABEL: foo0
 // CHECK-SAME: !llvm.array<4 x i8>
 // CHECK-SAME: i8
 
 func private @foo1(%arg0: !fir.char<2, 12>, %arg1: !fir.char<2, ?>)
 // CHECK-LABEL: foo1
 // CHECK-SAME: !llvm.array<12 x i16>
 // CHECK-SAME: i16
 
 func private @foo2(%arg0: !fir.char<4, 8>, %arg1: !fir.char<4, ?>)
 // CHECK-LABEL: foo2
 // CHECK-SAME: !llvm.array<8 x i32>
 // CHECK-SAME: i32
 
 // -----
 
+// Test `!fir.heap<>` conversion.
+func private @foo0(%arg0: !fir.heap<i32>)
+// CHECK-LABEL: foo0
+// CHECK-SAME: !llvm.ptr<i32>
+
+func private @foo1(%arg0: !fir.heap<!fir.array<4xf32>>)
+// CHECK-LABEL: foo1
+// CHECK-SAME: !llvm.ptr<array<4 x f32>>
+
+func private @foo2(%arg0: !fir.heap<!fir.array<?xf32>>)
+// CHECK-LABEL: foo2
+// CHECK-SAME: !llvm.ptr<f32>
+
+func private @foo3(%arg0: !fir.heap<!fir.char<1,10>>)
+// CHECK-LABEL: foo3
+// CHECK-SAME: !llvm.ptr<array<10 x i8>>
+
+func private @foo4(%arg0: !fir.heap<!fir.char<1,?>>)
+// CHECK-LABEL: foo4
+// CHECK-SAME: !llvm.ptr<i8>
+
+func private @foo5(%arg0: !fir.heap<!fir.array<2xf32>>)
+// CHECK-LABEL: foo5
+// CHECK-SAME: !llvm.ptr<array<2 x f32>>
+
+func private @foo6(%arg0: !fir.heap<!fir.array<?x?xf32>>)
+// CHECK-LABEL: foo6
+// CHECK-SAME: !llvm.ptr<f32>
+
+func private @foo7(%arg0: !fir.heap<!fir.type<ZT>>)
+// CHECK-LABEL: foo7
+// CHECK-SAME: !llvm.ptr<struct<"ZT", ()>>
+
+func private @foo8(%arg0: !fir.heap<!fir.type<_QMalloc_assignTt{i:i32}>>)
+// CHECK-LABEL: foo8
+// CHECK-SAME: !llvm.ptr<struct<"_QMalloc_assignTt", (i32)>>
+
+// -----
+
 // Test `!fir.logical<KIND>` conversion.
 
 func private @foo0(%arg0: !fir.logical<1>)
 // CHECK-LABEL: foo0
 // CHECK-SAME: i8
 
 func private @foo1(%arg0: !fir.logical<2>)
 // CHECK-LABEL: foo1