1; RUN: llc -start-after=codegenprepare -stop-before finalize-isel -o - %s \ 2; RUN: -experimental-debug-variable-locations=false \ 3; RUN: | FileCheck %s --check-prefixes=CHECK,DBGVALUE 4; RUN: llc -start-after=codegenprepare -stop-before finalize-isel -o - %s \ 5; RUN: -experimental-debug-variable-locations=true \ 6; RUN: | FileCheck %s --check-prefixes=CHECK,INSTRREF 7 8; RUN: llc -start-after=codegenprepare -stop-before finalize-isel -o - %s \ 9; RUN: -experimental-debug-variable-locations=false --try-experimental-debuginfo-iterators \ 10; RUN: | FileCheck %s --check-prefixes=CHECK,DBGVALUE 11 12; Test that dbg.values of an SSA variable that's not used in a basic block, 13; is converted to a DBG_VALUE in that same basic block. We know that %1 is 14; live from the entry bb to the exit bb, is allocated a vreg because it's 15; used across basic blocks. We should be able to produce a DBG_VALUE that 16; refers to it in the nextbb block. 17 18source_filename = "debug.c" 19target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 20target triple = "x86_64-unknown-linux-gnu" 21 22; Function Attrs: nounwind uwtable 23define dso_local i32 @main(i32 %arg0, i32 %arg1) local_unnamed_addr !dbg !11 { 24entry: 25; CHECK-LABEL: bb.0.entry: 26; INSTRREF: ADD32ri {{.*}} debug-instr-number 1 27 %0 = add i32 %arg0, 42, !dbg !26 28 %1 = add i32 %arg1, 101, !dbg !26 29 %cmp = icmp eq i32 %1, 0 30 br i1 %cmp, label %nextbb, label %exit, !dbg !26 31 32nextbb: 33; CHECK-LABEL: bb.{{.*}}.nextbb 34 %2 = mul i32 %0, %arg1, !dbg !26 35; CHECK: IMUL32rr 36 call void @llvm.dbg.value(metadata i32 %1, metadata !16, metadata !DIExpression()), !dbg !27 37; INSTRREF-NEXT: DBG_INSTR_REF {{.+}}, dbg-instr-ref(1, 0) 38; DBGVALUE-NEXT: DBG_VALUE 39 br label %exit, !dbg !26 40 41; CHECK-LABEL: bb.{{.*}}.exit 42exit: 43 %3 = phi i32 [ 12, %entry ], [ %2, %nextbb ], !dbg !26 44 %4 = add i32 %1, %3, !dbg !26 45 ret i32 %4, !dbg !26 46} 47 48declare void @llvm.dbg.value(metadata, metadata, metadata) 49 50!llvm.dbg.cu = !{!2} 51!llvm.module.flags = !{!7, !8, !9} 52!llvm.ident = !{!10} 53 54!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 7.0.0 (x)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4) 55!3 = !DIFile(filename: "debug.c", directory: "") 56!4 = !{} 57!6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 58!7 = !{i32 2, !"Dwarf Version", i32 4} 59!8 = !{i32 2, !"Debug Info Version", i32 3} 60!9 = !{i32 1, !"wchar_size", i32 4} 61!10 = !{!"clang version 7.0.0 (x)"} 62!11 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 3, type: !12, isLocal: false, isDefinition: true, scopeLine: 3, isOptimized: true, unit: !2, retainedNodes: !14) 63!12 = !DISubroutineType(types: !13) 64!13 = !{!6} 65!14 = !{!16} 66!16 = !DILocalVariable(name: "y", scope: !11, file: !3, line: 5, type: !6) 67!26 = !DILocation(line: 4, column: 7, scope: !11) 68!27 = !DILocation(line: 5, column: 7, scope: !11) 69!31 = !{!32, !32, i64 0} 70!32 = !{!"int", !33, i64 0} 71!33 = !{!"omnipotent char", !34, i64 0} 72!34 = !{!"Simple C/C++ TBAA"} 73