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1; RUN: llc -mtriple=x86_64-unknown-linux-gnu -start-after=codegenprepare -stop-before=finalize-isel -o - %s -experimental-debug-variable-locations=false | FileCheck %s --check-prefixes=CHECK,COMMON2; RUN: llc -mtriple=x86_64-unknown-linux-gnu -start-after=codegenprepare -stop-before=finalize-isel -o - %s -experimental-debug-variable-locations=true | FileCheck %s --check-prefixes=INSTRREF,COMMON3 4; Test case was generated from the following C code,5; using: clang -g -O1 -S -emit-llvm s.c -o s.ll6;7; struct s { long long int i, j; };8;9; extern void bar(struct s, struct s, struct s);10;11; int f(struct s s1, struct s s2) {12; volatile struct s tmp = {0};13; bar(s1, s2, tmp);14; s1.i = s2.i;15; s1.j = s2.j;16; return s1.j + s1.j;17; }18 19; Catch metadata references for involved variables.20;21; COMMON-DAG: ![[S1:.*]] = !DILocalVariable(name: "s1"22; COMMON-DAG: ![[S2:.*]] = !DILocalVariable(name: "s2"23 24define dso_local i32 @f(i64 %s1.coerce0, i64 %s1.coerce1, i64 %s2.coerce0, i64 %s2.coerce1) local_unnamed_addr #0 !dbg !7 {25; We expect DBG_VALUE instructions for the arguments at the entry.26; In instr-ref mode, there'll be some DBG_PHIs in there too.27; COMMON-LABEL: name: f28; COMMON-NOT: DBG_VALUE29; INSTRREF-DAG: DBG_PHI $rcx, 230; INSTRREF-DAG: DBG_PHI $rdx, 131; COMMON-DAG: DBG_VALUE $rdi, $noreg, ![[S1]], !DIExpression(DW_OP_LLVM_fragment, 0, 64)32; COMMON-DAG: DBG_VALUE $rsi, $noreg, ![[S1]], !DIExpression(DW_OP_LLVM_fragment, 64, 64)33; COMMON-DAG: DBG_VALUE $rdx, $noreg, ![[S2]], !DIExpression(DW_OP_LLVM_fragment, 0, 64)34; COMMON-DAG: DBG_VALUE $rcx, $noreg, ![[S2]], !DIExpression(DW_OP_LLVM_fragment, 64, 64)35; COMMON-NOT: DBG_36 37; Then arguments are copied to virtual registers.38; CHECK-NOT: DBG_VALUE39; CHECK-DAG: %[[R1:.*]]:gr64 = COPY $rcx40; CHECK-DAG: DBG_VALUE %[[R1]], $noreg, ![[S2]], !DIExpression(DW_OP_LLVM_fragment, 64, 64)41; CHECK-DAG: %[[R2:.*]]:gr64 = COPY $rdx42; CHECK-DAG: DBG_VALUE %[[R2]], $noreg, ![[S2]], !DIExpression(DW_OP_LLVM_fragment, 0, 64)43; CHECK-DAG: %[[R3:.*]]:gr64 = COPY $rsi44; CHECK-DAG: DBG_VALUE %[[R3]], $noreg, ![[S1]], !DIExpression(DW_OP_LLVM_fragment, 64, 64)45; CHECK-DAG: %[[R4:.*]]:gr64 = COPY $rdi46; CHECK-DAG: DBG_VALUE %[[R4]], $noreg, ![[S1]], !DIExpression(DW_OP_LLVM_fragment, 0, 64)47; CHECK-NOT: DBG_VALUE48 49; We have the call to bar.50; COMMON: ADJCALLSTACKDOWN51; COMMON: CALL64pcrel32 @bar52 53; After the call we expect to find new DBG_VALUE instructions for "s1".54; CHECK: ADJCALLSTACKUP55; CHECK-NOT: DBG_VALUE56; CHECK-DAG: DBG_VALUE %[[R2]], $noreg, ![[S1]], !DIExpression(DW_OP_LLVM_fragment, 0, 64)57; CHECK-DAG: DBG_VALUE %[[R1]], $noreg, ![[S1]], !DIExpression(DW_OP_LLVM_fragment, 64, 64)58 59;; In instruction referencing mode, we should refer to the instruction number60;; of the earlier DBG_PHIs.61; INSTRREF: ADJCALLSTACKUP62; INSTRREF-NOT: DBG_63; INSTRREF-DAG: DBG_INSTR_REF ![[S1]], !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_fragment, 0, 64), dbg-instr-ref(1, 0)64; INSTRREF-DAG: DBG_INSTR_REF ![[S1]], !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_fragment, 64, 64), dbg-instr-ref(2, 0)65 66; And then no more DBG_ instructions before the add.67; COMMON-NOT: DBG_68; COMMON: ADD32rr69 70entry:71 %tmp.sroa.0 = alloca i64, align 872 %tmp.sroa.4 = alloca i64, align 873 call void @llvm.dbg.declare(metadata ptr %tmp.sroa.0, metadata !19, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 64)), !dbg !2174 call void @llvm.dbg.declare(metadata ptr %tmp.sroa.4, metadata !19, metadata !DIExpression(DW_OP_LLVM_fragment, 64, 64)), !dbg !2175 call void @llvm.dbg.value(metadata i64 %s1.coerce0, metadata !17, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 64)), !dbg !2276 call void @llvm.dbg.value(metadata i64 %s1.coerce1, metadata !17, metadata !DIExpression(DW_OP_LLVM_fragment, 64, 64)), !dbg !2277 call void @llvm.dbg.value(metadata i64 %s2.coerce0, metadata !18, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 64)), !dbg !2378 call void @llvm.dbg.value(metadata i64 %s2.coerce1, metadata !18, metadata !DIExpression(DW_OP_LLVM_fragment, 64, 64)), !dbg !2379 call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %tmp.sroa.0), !dbg !2480 call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %tmp.sroa.4), !dbg !2481 store volatile i64 0, ptr %tmp.sroa.0, align 8, !dbg !2182 store volatile i64 0, ptr %tmp.sroa.4, align 8, !dbg !2183 tail call void @bar(i64 %s1.coerce0, i64 %s1.coerce1, i64 %s2.coerce0, i64 %s2.coerce1, i64 0, i64 0) #4, !dbg !2584 call void @llvm.dbg.value(metadata i64 %s2.coerce0, metadata !17, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 64)), !dbg !2285 call void @llvm.dbg.value(metadata i64 %s2.coerce1, metadata !17, metadata !DIExpression(DW_OP_LLVM_fragment, 64, 64)), !dbg !2286 %s2.coerce1.tr = trunc i64 %s2.coerce1 to i32, !dbg !2687 %conv = shl i32 %s2.coerce1.tr, 1, !dbg !2688 call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %tmp.sroa.0), !dbg !2789 call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %tmp.sroa.4), !dbg !2790 ret i32 %conv, !dbg !2891}92 93declare void @llvm.dbg.declare(metadata, metadata, metadata) #194declare void @llvm.dbg.value(metadata, metadata, metadata) #195declare void @llvm.lifetime.start.p0(i64, ptr nocapture) #296declare void @llvm.lifetime.end.p0(i64, ptr nocapture) #297 98declare dso_local void @bar(i64, i64, i64, i64, i64, i64) local_unnamed_addr99 100attributes #0 = { nounwind uwtable }101attributes #1 = { nounwind readnone speculatable }102attributes #2 = { argmemonly nounwind }103attributes #4 = { nounwind }104 105!llvm.dbg.cu = !{!0}106!llvm.module.flags = !{!3, !4, !5}107!llvm.ident = !{!6}108 109!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "llvm-svn @ 353529", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)110!1 = !DIFile(filename: "s.c", directory: "")111!2 = !{}112!3 = !{i32 2, !"Dwarf Version", i32 4}113!4 = !{i32 2, !"Debug Info Version", i32 3}114!5 = !{i32 1, !"wchar_size", i32 4}115!6 = !{!"llvm-svn @ 353529"}116!7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 5, type: !8, scopeLine: 5, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !16)117!8 = !DISubroutineType(types: !9)118!9 = !{!10, !11, !11}119!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)120!11 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "s", file: !1, line: 1, size: 128, elements: !12)121!12 = !{!13, !15}122!13 = !DIDerivedType(tag: DW_TAG_member, name: "i", scope: !11, file: !1, line: 1, baseType: !14, size: 64)123!14 = !DIBasicType(name: "long long int", size: 64, encoding: DW_ATE_signed)124!15 = !DIDerivedType(tag: DW_TAG_member, name: "j", scope: !11, file: !1, line: 1, baseType: !14, size: 64, offset: 64)125!16 = !{!17, !18, !19}126!17 = !DILocalVariable(name: "s1", arg: 1, scope: !7, file: !1, line: 5, type: !11)127!18 = !DILocalVariable(name: "s2", arg: 2, scope: !7, file: !1, line: 5, type: !11)128!19 = !DILocalVariable(name: "tmp", scope: !7, file: !1, line: 6, type: !20)129!20 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !11)130!21 = !DILocation(line: 6, column: 21, scope: !7)131!22 = !DILocation(line: 5, column: 16, scope: !7)132!23 = !DILocation(line: 5, column: 29, scope: !7)133!24 = !DILocation(line: 6, column: 3, scope: !7)134!25 = !DILocation(line: 7, column: 3, scope: !7)135!26 = !DILocation(line: 10, column: 10, scope: !7)136!27 = !DILocation(line: 11, column: 1, scope: !7)137!28 = !DILocation(line: 10, column: 3, scope: !7)138