Add testcase.

Author: abidh

llvm/test/DebugInfo/subrange-missing-upperBound.ll

@@ -0,0 +1,40 @@
+; RUN: %llc_dwarf %s -filetype=obj -o - | llvm-dwarfdump - | FileCheck %s
+
+; ModuleID = 'test.ll'
+source_filename = "test.f90"
+
+!llvm.module.flags = !{!1}
+!llvm.dbg.cu = !{!2}
+
+!1 = !{i32 2, !"Debug Info Version", i32 3}
+!2 = distinct !DICompileUnit(language: DW_LANG_Fortran90, file: !3, emissionKind: FullDebug, retainedTypes: !5)
+!3 = !DIFile(filename: "test.f90", directory: "dir")
+!5 = !{!6, !10, !13}
+!6 = !DICompositeType(tag: DW_TAG_array_type, baseType: !7, elements: !8)
+!7 = !DIBasicType(name: "integer", size: 32, align: 32, encoding: DW_ATE_signed)
+!8 = !{!9}
+!9 = !DISubrange(lowerBound: 2, stride: 16)
+!10 = !DICompositeType(tag: DW_TAG_array_type, baseType: !7, elements: !11)
+!11 = !{!12}
+!12 = !DISubrange()
+!13 = !DICompositeType(tag: DW_TAG_array_type, baseType: !7, elements: !14)
+!14 = !{!15}
+!15 = !DIGenericSubrange(lowerBound: !16, stride: !17)
+!16 = !DIExpression(DW_OP_push_object_address, DW_OP_plus_uconst, 48, DW_OP_deref)
+!17 = !DIExpression(DW_OP_push_object_address, DW_OP_plus_uconst, 56, DW_OP_deref)
+
+; Test that debug info is generated correctly in the absence of 'count' and
+; 'upperBound' in DISubrange/DIGenericSubrange.
+
+; CHECK-LABEL: DW_TAG_subrange_type
+; CHECK-NEXT:   DW_AT_type
+; CHECK-NEXT:   DW_AT_lower_bound     (2)
+; CHECK-NEXT:   DW_AT_byte_stride     (16)
+
+; CHECK-LABEL: DW_TAG_subrange_type
+; CHECK-NEXT:   DW_AT_type
+
+; CHECK-LABEL: DW_TAG_generic_subrange
+; CHECK-NEXT:   DW_AT_type
+; CHECK-NEXT:   DW_AT_lower_bound     (DW_OP_push_object_address, DW_OP_plus_uconst 0x30, DW_OP_deref)
+; CHECK-NEXT:   DW_AT_byte_stride     (DW_OP_push_object_address, DW_OP_plus_uconst 0x38, DW_OP_deref)