1# After adding new debug instruction for labels, it is possible to have 2# debug instructions before DBG_VALUE. When querying DBG_VALUE's slot 3# index using previous instruction and the previous instruction is debug 4# instruction, it will trigger an assertion as using debug instruction 5# to get slot index. This test is to emulate the case when DBG_VALUE's 6# previous instruction is DBG_LABEL in LiveDebugVariables pass. 7# 8# RUN: llc -run-pass=livedebugvars -run-pass=virtregrewriter -o - %s | FileCheck %s 9 10--- | 11 target triple = "x86_64-unknown-linux-gnu" 12 13 define i32 @foo(i32 %a, i32 %b) !dbg !4 { 14 entry: 15 ret i32 0, !dbg !12 16 } 17 18 !llvm.dbg.cu = !{!0} 19 !llvm.module.flags = !{!3} 20 21 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) 22 !1 = !DIFile(filename: "debug-var-slot.c", directory: "./") 23 !2 = !{} 24 !3 = !{i32 2, !"Debug Info Version", i32 3} 25 !4 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !5, isLocal: false, isDefinition: true, scopeLine: 2, isOptimized: true, unit: !0, retainedNodes: !2) 26 !5 = !DISubroutineType(types: !6) 27 !6 = !{!7, !7, !7} 28 !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 29 !8 = !DILabel(scope: !4, name: "top", file: !1, line: 4) 30 !9 = !DILocation(line: 4, column: 1, scope: !4) 31 !10 = !DILocalVariable(name: "local_var", scope: !4, file: !1, line: 7, type: !7) 32 !11 = !DILocation(line: 7, column: 1, scope: !4) 33 !12 = !DILocation(line: 8, column: 3, scope: !4) 34 !13 = !DILocalVariable(name: "local_var2", scope: !4, file: !1, line: 7, type: !7) 35 36... 37--- 38name: foo 39tracksRegLiveness: true 40body: | 41 bb.0: 42 43 DBG_VALUE $esi, $noreg, !13, !DIExpression(), debug-location !11 44 DBG_LABEL !8, debug-location !9 45 DBG_VALUE $edi, $noreg, !10, !DIExpression(), debug-location !11 46 RET 0, undef $eax, debug-location !12 47... 48 49# CHECK-LABEL: name: foo 50# CHECK: bb.0: 51# CHECK-DAG: DBG_LABEL 52# CHECK-DAG: DBG_VALUE $esi 53# CHECK-DAG: DBG_VALUE $edi 54