Revert "[flang][debug] Support mlir::NoneType." (#113769)
Reverts llvm/llvm-project#113550
It turns out this causes compiler crashes with assumed-type arrays and -g.
See https://github.com/llvm/llvm-project/pull/113769 for a reproducer.
diff --git a/flang/lib/Optimizer/Transforms/DebugTypeGenerator.cpp b/flang/lib/Optimizer/Transforms/DebugTypeGenerator.cpp
index e387e27..1ab6c76 100644
--- a/flang/lib/Optimizer/Transforms/DebugTypeGenerator.cpp
+++ b/flang/lib/Optimizer/Transforms/DebugTypeGenerator.cpp
@@ -581,8 +581,6 @@
/*genAssociated=*/false);
} else if (auto vecTy = mlir::dyn_cast_or_null<fir::VectorType>(Ty)) {
return convertVectorType(vecTy, fileAttr, scope, declOp);
- } else if (mlir::isa<mlir::NoneType>(Ty)) {
- return mlir::LLVM::DINullTypeAttr::get(context);
} else if (auto boxTy = mlir::dyn_cast_or_null<fir::BoxType>(Ty)) {
auto elTy = boxTy.getElementType();
if (auto seqTy = mlir::dyn_cast_or_null<fir::SequenceType>(elTy))
diff --git a/flang/test/Transforms/debug-none-type.fir b/flang/test/Transforms/debug-none-type.fir
deleted file mode 100644
index 5eee6a6..0000000
--- a/flang/test/Transforms/debug-none-type.fir
+++ /dev/null
@@ -1,14 +0,0 @@
-// RUN: fir-opt --add-debug-info --mlir-print-debuginfo %s | FileCheck %s
-
-module attributes {dlti.dl_spec = #dlti.dl_spec<>} {
- func.func private @_FortranAAssign(i8) -> none loc(#loc1)
- func.func private @foo() -> !fir.ref<none> loc(#loc2)
-}
-#loc1 = loc("test.f90":5:1)
-#loc2 = loc("test.f90":15:1)
-
-// CHECK: #[[INT8_TY:.*]] = #llvm.di_basic_type<tag = DW_TAG_base_type, name = "integer", sizeInBits = 8, encoding = DW_ATE_signed>
-// CHECK: #[[NONE_TY:.*]] = #llvm.di_null_type
-// CHECK: #[[REFNONE_TY:.*]] = #llvm.di_derived_type<tag = DW_TAG_pointer_type, name = "", baseType = #di_null_type{{.*}}>
-// CHECK: #llvm.di_subroutine_type<{{.*}}types = #[[NONE_TY]], #[[INT8_TY]]>
-// CHECK: #llvm.di_subroutine_type<{{.*}}types = #[[REFNONE_TY]]>
