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| ; RUN: llc -mtriple=x86_64-linux-gnu -filetype=obj -o - %s | llvm-dwarfdump -debug-loc - | FileCheck %s
|
| ; The test inlines the function F four times, with each inlined variable for
| ; "i4" sharing the same virtual register. This means the live interval of the
| ; register spans all of the inlined callsites, extending beyond the lexical
| ; scope of each. Later during register allocation the live interval is split
| ; into multiple intervals. Check that this does not generate multiple entries
| ; within the debug location (see PR33730).
| ;
| ; Generated from:
| ;
| ; extern int foobar(int, int, int, int, int);
| ;
| ; int F(int i1, int i2, int i3, int i4, int i5) {
| ; return foobar(i1, i2, i3, i4, i5);
| ; }
| ;
| ; int foo(int a, int b, int c, int d, int e) {
| ; return F(a,b,c,d,e) +
| ; F(a,b,c,d,e) +
| ; F(a,b,c,d,e) +
| ; F(a,b,c,d,e);
| ; }
|
| ; CHECK: .debug_loc contents:
| ; CHECK-NEXT: 0x00000000:
| ; We currently emit an entry for the function prologue, too, which could be optimized away.
| ; CHECK: [0x000000000000001f, 0x000000000000003c): DW_OP_reg3 RBX
| ; We should only have one entry inside the function.
| ; CHECK-NOT: :
|
| declare i32 @foobar(i32, i32, i32, i32, i32)
|
| define i32 @foo(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) !dbg !25 {
| entry:
| tail call void @llvm.dbg.value(metadata i32 %d, i64 0, metadata !15, metadata !17) #3, !dbg !41
| %call.i = tail call i32 @foobar(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) #3, !dbg !43
| %call.i21 = tail call i32 @foobar(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) #3, !dbg !50
| %add = add nsw i32 %call.i21, %call.i, !dbg !51
| %call.i22 = tail call i32 @foobar(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) #3, !dbg !58
| %add3 = add nsw i32 %add, %call.i22, !dbg !59
| %call.i23 = tail call i32 @foobar(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) #3, !dbg !66
| %add5 = add nsw i32 %add3, %call.i23, !dbg !67
| ret i32 %add5, !dbg !68
| }
|
| declare void @llvm.dbg.value(metadata, i64, metadata, metadata)
|
| !llvm.dbg.cu = !{!0}
| !llvm.module.flags = !{!3, !4, !5}
| !llvm.ident = !{!6}
|
| !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)
| !1 = !DIFile(filename: "foo.c", directory: "")
| !2 = !{}
| !3 = !{i32 2, !"Dwarf Version", i32 4}
| !4 = !{i32 2, !"Debug Info Version", i32 3}
| !5 = !{i32 1, !"wchar_size", i32 4}
| !6 = !{!"clang version 6.0.0 (trunk 308976)"}
| !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)
| !8 = !DISubroutineType(types: !9)
| !9 = !{!10, !10, !10, !10, !10, !10}
| !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
| !11 = !{!15}
| !15 = !DILocalVariable(name: "i4", arg: 4, scope: !7, file: !1, line: 3, type: !10)
| !17 = !DIExpression()
| !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)
| !26 = !{}
| !38 = distinct !DILocation(line: 8, column: 10, scope: !25)
| !41 = !DILocation(line: 3, column: 35, scope: !7, inlinedAt: !38)
| !43 = !DILocation(line: 4, column: 10, scope: !7, inlinedAt: !38)
| !45 = distinct !DILocation(line: 9, column: 10, scope: !25)
| !50 = !DILocation(line: 4, column: 10, scope: !7, inlinedAt: !45)
| !51 = !DILocation(line: 8, column: 23, scope: !25)
| !53 = distinct !DILocation(line: 10, column: 10, scope: !25)
| !58 = !DILocation(line: 4, column: 10, scope: !7, inlinedAt: !53)
| !59 = !DILocation(line: 9, column: 23, scope: !25)
| !61 = distinct !DILocation(line: 11, column: 10, scope: !25)
| !66 = !DILocation(line: 4, column: 10, scope: !7, inlinedAt: !61)
| !67 = !DILocation(line: 10, column: 23, scope: !25)
| !68 = !DILocation(line: 8, column: 3, scope: !25)
|
|