xref: /llvm-project/llvm/test/DebugInfo/X86/live-debug-variables.ll (revision 189900eb149bb55ae3787346f57c1ccbdc50fb3c) 
1; RUN: llc -mtriple=x86_64-linux-gnu -filetype=obj -o - %s -experimental-debug-variable-locations=false | llvm-dwarfdump -name i4 - \
2; RUN:     | FileCheck %s
3
4; The test inlines the function F four times, with each inlined variable for
5; "i4" sharing the same virtual register. This means the live interval of the
6; register spans all of the inlined callsites, extending beyond the lexical
7; scope of each. Later during register allocation the live interval is split
8; into multiple intervals. Check that this does not generate multiple entries
9; within the debug location (see PR33730).
10;
11; Generated from:
12;
13; extern int foobar(int, int, int, int, int);
14;
15; int F(int i1, int i2, int i3, int i4, int i5) {
16;   return foobar(i1, i2, i3, i4, i5);
17; }
18;
19; int foo(int a, int b, int c, int d, int e) {
20;   return F(a,b,c,d,e) +
21;          F(a,b,c,d,e) +
22;          F(a,b,c,d,e) +
23;          F(a,b,c,d,e);
24; }
25
26; Ignore the abstract entry.
27; CHECK: DW_TAG_formal_parameter
28; Check concrete entry has a single location.
29; CHECK:      DW_TAG_formal_parameter
30; CHECK-NEXT:   DW_AT_location (DW_OP_reg6 RBP)
31; CHECK-NEXT:   DW_AT_abstract_origin
32; CHECK-NOT:  DW_TAG_formal_parameter
33
34declare i32 @foobar(i32, i32, i32, i32, i32)
35
36define i32 @foo(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) !dbg !25 {
37entry:
38  tail call void @llvm.dbg.value(metadata i32 %d, i64 0, metadata !15, metadata !17) #3, !dbg !41
39  %call.i = tail call i32 @foobar(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) #3, !dbg !43
40  %call.i21 = tail call i32 @foobar(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) #3, !dbg !50
41  %add = add nsw i32 %call.i21, %call.i, !dbg !51
42  %call.i22 = tail call i32 @foobar(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) #3, !dbg !58
43  %add3 = add nsw i32 %add, %call.i22, !dbg !59
44  %call.i23 = tail call i32 @foobar(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) #3, !dbg !66
45  %add5 = add nsw i32 %add3, %call.i23, !dbg !67
46  ret i32 %add5, !dbg !68
47}
48
49declare void @llvm.dbg.value(metadata, i64, metadata, metadata)
50
51!llvm.dbg.cu = !{!0}
52!llvm.module.flags = !{!3, !4, !5}
53!llvm.ident = !{!6}
54
55!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0 (trunk 308976)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
56!1 = !DIFile(filename: "foo.c", directory: "")
57!2 = !{}
58!3 = !{i32 2, !"Dwarf Version", i32 4}
59!4 = !{i32 2, !"Debug Info Version", i32 3}
60!5 = !{i32 1, !"wchar_size", i32 4}
61!6 = !{!"clang version 6.0.0 (trunk 308976)"}
62!7 = distinct !DISubprogram(name: "F", scope: !1, file: !1, line: 3, type: !8, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11)
63!8 = !DISubroutineType(types: !9)
64!9 = !{!10, !10, !10, !10, !10, !10}
65!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
66!11 = !{!15}
67!15 = !DILocalVariable(name: "i4", arg: 4, scope: !7, file: !1, line: 3, type: !10)
68!17 = !DIExpression()
69!25 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 7, type: !8, isLocal: false, isDefinition: true, scopeLine: 7, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !26)
70!26 = !{}
71!38 = distinct !DILocation(line: 8, column: 10, scope: !25)
72!41 = !DILocation(line: 3, column: 35, scope: !7, inlinedAt: !38)
73!43 = !DILocation(line: 4, column: 10, scope: !7, inlinedAt: !38)
74!45 = distinct !DILocation(line: 9, column: 10, scope: !25)
75!50 = !DILocation(line: 4, column: 10, scope: !7, inlinedAt: !45)
76!51 = !DILocation(line: 8, column: 23, scope: !25)
77!53 = distinct !DILocation(line: 10, column: 10, scope: !25)
78!58 = !DILocation(line: 4, column: 10, scope: !7, inlinedAt: !53)
79!59 = !DILocation(line: 9, column: 23, scope: !25)
80!61 = distinct !DILocation(line: 11, column: 10, scope: !25)
81!66 = !DILocation(line: 4, column: 10, scope: !7, inlinedAt: !61)
82!67 = !DILocation(line: 10, column: 23, scope: !25)
83!68 = !DILocation(line: 8, column: 3, scope: !25)
84