[DWARF] Ignore DW_ATE_lo_user to hi_user in DebugHandlerBase assertion (#161695)

Fixes #140362

Author: OCHyams

llvm/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp

@@ -240,6 +240,8 @@ bool DebugHandlerBase::isUnsignedDIType(const DIType *Ty) {
           Encoding == dwarf::DW_ATE_complex_float ||
           Encoding == dwarf::DW_ATE_signed_fixed ||
           Encoding == dwarf::DW_ATE_unsigned_fixed ||
+          (Encoding >= dwarf::DW_ATE_lo_user &&
+           Encoding <= dwarf::DW_ATE_hi_user) ||
           (Ty->getTag() == dwarf::DW_TAG_unspecified_type &&
            Ty->getName() == "decltype(nullptr)")) &&
          "Unsupported encoding");

llvm/test/DebugInfo/dwarf-complex-int.ll

@@ -0,0 +1,59 @@
+; REQUIRES: object-emission
+; RUN: %llc_dwarf %s -filetype=obj -o - | llvm-dwarfdump - | FileCheck %s
+
+;; https://github.com/llvm/llvm-project/issues/140362
+;; Don't assert when emitting a complex integer type in DWARF.
+
+;; C source:
+;; int g;
+;;
+;; void foo(_Complex short c) { __builtin_memmove(&g, (char *)&c, 2); }
+;;
+;; void bar() { foo(0); }
+
+; CHECK: DW_AT_type ([[complex:0x[0-9a-f]+]] "complex")
+
+; CHECK: [[complex]]: DW_TAG_base_type
+; CHECK-NEXT: DW_AT_name        ("complex")
+; CHECK-NEXT: DW_AT_encoding    (0x80)
+; CHECK-NEXT: DW_AT_byte_size   (0x04)
+
+@g = dso_local local_unnamed_addr global i32 0, align 4, !dbg !0
+
+define dso_local void @bar() local_unnamed_addr !dbg !18 {
+entry:
+    #dbg_value(i32 0, !21, !DIExpression(), !27)
+  store i16 0, ptr @g, align 4, !dbg !29
+  ret void, !dbg !30
+}
+
+!llvm.dbg.cu = !{!2}
+!llvm.module.flags = !{!10, !11}
+!llvm.ident = !{!17}
+
+!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
+!1 = distinct !DIGlobalVariable(name: "g", scope: !2, file: !8, line: 1, type: !9, isLocal: false, isDefinition: true)
+!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !3, producer: "clang version 22.0.0git", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, retainedTypes: !4, globals: !7, splitDebugInlining: false, nameTableKind: None)
+!3 = !DIFile(filename: "/app/example.cpp", directory: "/app")
+!4 = !{!5}
+!5 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !6, size: 64)
+!6 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
+!7 = !{!0}
+!8 = !DIFile(filename: "example.cpp", directory: "/app")
+!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!10 = !{i32 7, !"Dwarf Version", i32 5}
+!11 = !{i32 2, !"Debug Info Version", i32 3}
+!17 = !{!"clang version 22.0.0git"}
+!18 = distinct !DISubprogram(name: "bar", linkageName: "bar()", scope: !8, file: !8, line: 5, type: !19, scopeLine: 5, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, keyInstructions: true)
+!19 = !DISubroutineType(types: !20)
+!20 = !{null}
+!21 = !DILocalVariable(name: "c", arg: 1, scope: !22, file: !8, line: 3, type: !25)
+!22 = distinct !DISubprogram(name: "foo", linkageName: "_ZL3fooCs", scope: !8, file: !8, line: 3, type: !23, scopeLine: 3, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !26, keyInstructions: true)
+!23 = !DISubroutineType(types: !24)
+!24 = !{null, !25}
+!25 = !DIBasicType(name: "complex", size: 32, encoding: 128)
+!26 = !{!21}
+!27 = !DILocation(line: 0, scope: !22, inlinedAt: !28)
+!28 = distinct !DILocation(line: 5, column: 14, scope: !18)
+!29 = !DILocation(line: 3, column: 37, scope: !22, inlinedAt: !28, atomGroup: 1, atomRank: 1)
+!30 = !DILocation(line: 5, column: 22, scope: !18, atomGroup: 1, atomRank: 1)