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Authored by void on Dec 5 2012, 4:54 PM.
Index: test/DebugInfo/X86/nondefault-subrange-array.ll
===================================================================
--- test/DebugInfo/X86/nondefault-subrange-array.ll (revision 0)
+++ test/DebugInfo/X86/nondefault-subrange-array.ll (revision 0)
@@ -0,0 +1,45 @@
+; RUN: llc -mtriple=x86_64-apple-darwin -O0 -filetype=obj -o %t < %s
+; RUN: llvm-dwarfdump %t | FileCheck %s
+
+%class.A = type { [42 x i32] }
+
+@a = global %class.A zeroinitializer, align 4
+
+; CHECK: 0x0000002d: DW_TAG_base_type [3]
+; CHECK-NEXT: 0x0000002e: DW_AT_byte_size [DW_FORM_data1] (0x04)
+; CHECK-NEXT: 0x0000002f: DW_AT_encoding [DW_FORM_data1] (0x05)
+
+; CHECK: 0x00000030: DW_TAG_array_type [4] *
+; CHECK-NEXT: 0x00000031: DW_AT_type [DW_FORM_ref4] (cu + 0x0026 => {0x00000026})
+
+; CHECK: 0x00000035: DW_TAG_subrange_type [5]
+; CHECK-NEXT: 0x00000036: DW_AT_type [DW_FORM_ref4] (cu + 0x002d => {0x0000002d})
+; CHECK-NEXT: 0x0000003a: DW_AT_lower_bound [DW_FORM_data8] (0xfffffffffffffffd)
+; CHECK-NEXT: 0x00000042: DW_AT_upper_bound [DW_FORM_data1] (0x26)
+
+; CHECK: 0x00000051: DW_TAG_member [8]
+; CHECK-NEXT: 0x00000052: DW_AT_name [DW_FORM_strp] ( .debug_str[0x0000003f] = "x")
+; CHECK-NEXT: 0x00000056: DW_AT_type [DW_FORM_ref4] (cu + 0x0030 => {0x00000030})
+
+!llvm.dbg.cu = !{!0}
+
+!0 = metadata !{i32 786449, i32 0, i32 4, metadata !"t.cpp", metadata !"/Volumes/Sandbox/llvm", metadata !"clang version 3.3 (trunk 169136)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !1, metadata !3} ; [ DW_TAG_compile_unit ] [/Volumes/Sandbox/llvm/t.cpp] [DW_LANG_C_plus_plus]
+!1 = metadata !{metadata !2}
+!2 = metadata !{i32 0}
+!3 = metadata !{metadata !4}
+!4 = metadata !{metadata !5}
+!5 = metadata !{i32 786484, i32 0, null, metadata !"a", metadata !"a", metadata !"", metadata !6, i32 1, metadata !7, i32 0, i32 1, %class.A* @a} ; [ DW_TAG_variable ] [a] [line 1] [def]
+!6 = metadata !{i32 786473, metadata !"t.cpp", metadata !"/Volumes/Sandbox/llvm", null} ; [ DW_TAG_file_type ]
+!7 = metadata !{i32 786434, null, metadata !"A", metadata !6, i32 1, i64 0, i64 32, i32 0, i32 0, null, metadata !8, i32 0, null, null} ; [ DW_TAG_class_type ] [A] [line 1, size 0, align 32, offset 0] [from ]
+!8 = metadata !{metadata !9, metadata !14}
+!9 = metadata !{i32 786445, metadata !7, metadata !"x", metadata !6, i32 1, i64 0, i64 0, i64 0, i32 1, metadata !10} ; [ DW_TAG_member ] [x] [line 1, size 0, align 0, offset 0] [private] [from ]
+!10 = metadata !{i32 786433, null, metadata !"", null, i32 0, i64 0, i64 32, i32 0, i32 0, metadata !11, metadata !12, i32 0, i32 0} ; [ DW_TAG_array_type ] [line 0, size 0, align 32, offset 0] [from int]
+!11 = metadata !{i32 786468, null, metadata !"int", null, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
+!12 = metadata !{metadata !13}
+!13 = metadata !{i32 786465, i64 -3, i64 42} ; [ DW_TAG_subrange_type ] [-3, 39]
+!14 = metadata !{i32 786478, i32 0, metadata !7, metadata !"A", metadata !"A", metadata !"", metadata !6, i32 1, metadata !15, i1 false, i1 false, i32 0, i32 0, null, i32 320, i1 false, null, null, i32 0, metadata !18, i32 1} ; [ DW_TAG_subprogram ] [line 1] [A]
+!15 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !16, i32 0, i32 0} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!16 = metadata !{null, metadata !17}
+!17 = metadata !{i32 786447, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !7} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from A]
+!18 = metadata !{metadata !19}
+!19 = metadata !{i32 786468} ; [ DW_TAG_base_type ] [line 0, size 0, align 0, offset 0]
Index: include/llvm/DebugInfo.h
===================================================================
--- include/llvm/DebugInfo.h (revision 169405)
+++ include/llvm/DebugInfo.h (working copy)
@@ -142,7 +142,7 @@
public:
explicit DISubrange(const MDNode *N = 0) : DIDescriptor(N) {}
- uint64_t getLo() const { return getUInt64Field(1); }
+ int64_t getLo() const { return getInt64Field(1); }
int64_t getCount() const { return getInt64Field(2); }
};
Index: lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
===================================================================
--- lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp (revision 169405)
+++ lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp (working copy)
@@ -51,6 +51,41 @@
return Value;
}
+/// getLowerBoundDefault - Return the default lower bound for an array.
+int64_t CompileUnit::getLowerBoundDefault() const {
+ switch (Language) {
+ default:
+ break;
+
+ case dwarf::DW_LANG_C89:
+ case dwarf::DW_LANG_C99:
+ case dwarf::DW_LANG_C:
+ case dwarf::DW_LANG_C_plus_plus:
+ case dwarf::DW_LANG_ObjC:
+ case dwarf::DW_LANG_ObjC_plus_plus:
+ case dwarf::DW_LANG_Java:
+ case dwarf::DW_LANG_D:
+ case dwarf::DW_LANG_Python:
+ case dwarf::DW_LANG_UPC:
+ return 0;
+
+ case dwarf::DW_LANG_Ada83:
+ case dwarf::DW_LANG_Ada95:
+ case dwarf::DW_LANG_Fortran77:
+ case dwarf::DW_LANG_Fortran90:
+ case dwarf::DW_LANG_Fortran95:
+ case dwarf::DW_LANG_Cobol74:
+ case dwarf::DW_LANG_Cobol85:
+ case dwarf::DW_LANG_Modula2:
+ case dwarf::DW_LANG_Pascal83:
+ case dwarf::DW_LANG_PLI:
+ return 1;
+ }
+
+ llvm_unreachable("unknown lower bound for language");
+ return -1;
+}
+
/// addFlag - Add a flag that is true.
void CompileUnit::addFlag(DIE *Die, unsigned Attribute) {
if (!DD->useDarwinGDBCompat())
@@ -1256,19 +1291,17 @@
// then the array is unbounded and we do not emit DW_AT_lower_bound and
// DW_AT_upper_bound attributes. If L == 0 and Count == 0, then the array has
// zero elements in which case we do not emit an upper bound.
- uint64_t L = SR.getLo();
+ int64_t L = SR.getLo();
int64_t Count = SR.getCount();
- if (Count != -1) {
+ if (L != getLowerBoundDefault())
+ addUInt(DW_Subrange, dwarf::DW_AT_lower_bound, 0, L);
+
+ if (Count != -1 && Count != 0)
// FIXME: An unbounded array should reference the expression that defines
// the array.
- if (L)
- addUInt(DW_Subrange, dwarf::DW_AT_lower_bound, 0, L);
+ addUInt(DW_Subrange, dwarf::DW_AT_upper_bound, 0, L + Count - 1);
- if (Count != 0)
- addUInt(DW_Subrange, dwarf::DW_AT_upper_bound, 0, Count - 1);
- }
-
Buffer.addChild(DW_Subrange);
}
Index: lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
===================================================================
--- lib/CodeGen/AsmPrinter/DwarfCompileUnit.h (revision 169405)
+++ lib/CodeGen/AsmPrinter/DwarfCompileUnit.h (working copy)
@@ -79,6 +79,8 @@
/// corresponds to the MDNode mapped with the subprogram DIE.
DenseMap<DIE *, const MDNode *> ContainingTypeMap;
+ int64_t getLowerBoundDefault() const;
+
public:
CompileUnit(unsigned UID, unsigned L, DIE *D, AsmPrinter *A, DwarfDebug *DW);
~CompileUnit();
@@ -174,7 +176,6 @@
void setIndexTyDie(DIE *D) {
IndexTyDie = D;
}
-public:
/// addFlag - Add a flag that is true to the DIE.
void addFlag(DIE *Die, unsigned Attribute);

Event Timeline

void edited the content of this paste. (Show Details)Dec 5 2012, 4:54 PM