; RUN: llc %s -stop-after=finalize-isel -o - \ ; RUN: | FileCheck %s --implicit-check-not=DBG_VALUE ; RUN: llc --try-experimental-debuginfo-iterators %s -stop-after=finalize-isel -o - \ ; RUN: | FileCheck %s --implicit-check-not=DBG_VALUE ;; Check that sandwiching instructions between a linked store and dbg.assign ;; results in a dbg.value(prev_value) being inserted at the store, and a ;; dbg.value(deref) at the dbg.assign. ; CHECK: bb.0.entry: ; CHECK-NEXT: DBG_VALUE %stack.0.c, $noreg, ![[var:[0-9]+]], !DIExpression(DW_OP_deref), debug-location ; CHECK: MOV8mi %stack.0.c, 1, $noreg, 0, $noreg, 0 ;; No DBG_VALUE required because the stack location is still valid. ; CHECK: MOV8mi %stack.0.c, 1, $noreg, 0, $noreg, 1 ; CHECK-NEXT: DBG_VALUE 0, $noreg, ![[var]], !DIExpression(), debug-location ; CHECK: CALL64pcrel32 @d ; CHECK-NEXT: ADJCALLSTACKUP64 ; CHECK-NEXT: DBG_VALUE %stack.0.c, $noreg, ![[var]], !DIExpression(DW_OP_deref), debug-location target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" target triple = "x86_64-unknown-linux-gnu" ; Function Attrs: nounwind uwtable define dso_local void @b() local_unnamed_addr #0 !dbg !7 { entry: %c = alloca i8, align 1, !DIAssignID !13 call void @llvm.dbg.assign(metadata i1 undef, metadata !11, metadata !DIExpression(), metadata !13, metadata ptr %c, metadata !DIExpression()), !dbg !14 call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %c) #4, !dbg !15 store i8 0, ptr %c, align 1, !dbg !16, !DIAssignID !20 call void @llvm.dbg.assign(metadata i8 0, metadata !11, metadata !DIExpression(), metadata !20, metadata ptr %c, metadata !DIExpression()), !dbg !14 tail call void (...) @d() #4, !dbg !21 ; --- VV Hand written VV --- ; store i8 1, ptr %c, align 1, !dbg !16, !DIAssignID !31 ; Check that a dbg.value(0) is inserted here. tail call void (...) @d() #4, !dbg !21 call void @llvm.dbg.assign(metadata i8 1, metadata !11, metadata !DIExpression(), metadata !31, metadata ptr %c, metadata !DIExpression()), !dbg !14 ; --- AA Hand written AA --- ; call void @a(ptr nonnull %c) #4, !dbg !22 call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %c) #4, !dbg !23 ret void, !dbg !23 } declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1 declare !dbg !24 dso_local void @d(...) local_unnamed_addr #2 declare !dbg !27 dso_local void @a(ptr) local_unnamed_addr #2 declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1 declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata) #3 !llvm.dbg.cu = !{!0} !llvm.module.flags = !{!3, !4, !5, !1000} !llvm.ident = !{!6} !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 12.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None) !1 = !DIFile(filename: "reduce.c", directory: "/") !2 = !{} !3 = !{i32 7, !"Dwarf Version", i32 4} !4 = !{i32 2, !"Debug Info Version", i32 3} !5 = !{i32 1, !"wchar_size", i32 4} !6 = !{!"clang version 12.0.0"} !7 = distinct !DISubprogram(name: "b", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !10) !8 = !DISubroutineType(types: !9) !9 = !{null} !10 = !{!11} !11 = !DILocalVariable(name: "c", scope: !7, file: !1, line: 4, type: !12) !12 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char) !13 = distinct !DIAssignID() !14 = !DILocation(line: 0, scope: !7) !15 = !DILocation(line: 4, column: 3, scope: !7) !16 = !DILocation(line: 4, column: 8, scope: !7) !20 = distinct !DIAssignID() !21 = !DILocation(line: 5, column: 3, scope: !7) !22 = !DILocation(line: 6, column: 3, scope: !7) !23 = !DILocation(line: 7, column: 1, scope: !7) !24 = !DISubprogram(name: "d", scope: !1, file: !1, line: 2, type: !25, spFlags: DISPFlagOptimized, retainedNodes: !2) !25 = !DISubroutineType(types: !26) !26 = !{null, null} !27 = !DISubprogram(name: "a", scope: !1, file: !1, line: 1, type: !28, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2) !28 = !DISubroutineType(types: !29) !29 = !{null, !30} !30 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64) !31 = distinct !DIAssignID() !1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true}