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,COMMON 2; 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,COMMON 3 4; Test case was generated from the following C code, 5; using: clang -g -O1 -S -emit-llvm s.c -o s.ll 6; 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: f 28; COMMON-NOT: DBG_VALUE 29; INSTRREF-DAG: DBG_PHI $rcx, 2 30; INSTRREF-DAG: DBG_PHI $rdx, 1 31; 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_VALUE 39; CHECK-DAG: %[[R1:.*]]:gr64 = COPY $rcx 40; CHECK-DAG: DBG_VALUE %[[R1]], $noreg, ![[S2]], !DIExpression(DW_OP_LLVM_fragment, 64, 64) 41; CHECK-DAG: %[[R2:.*]]:gr64 = COPY $rdx 42; CHECK-DAG: DBG_VALUE %[[R2]], $noreg, ![[S2]], !DIExpression(DW_OP_LLVM_fragment, 0, 64) 43; CHECK-DAG: %[[R3:.*]]:gr64 = COPY $rsi 44; CHECK-DAG: DBG_VALUE %[[R3]], $noreg, ![[S1]], !DIExpression(DW_OP_LLVM_fragment, 64, 64) 45; CHECK-DAG: %[[R4:.*]]:gr64 = COPY $rdi 46; CHECK-DAG: DBG_VALUE %[[R4]], $noreg, ![[S1]], !DIExpression(DW_OP_LLVM_fragment, 0, 64) 47; CHECK-NOT: DBG_VALUE 48 49; We have the call to bar. 50; COMMON: ADJCALLSTACKDOWN 51; COMMON: CALL64pcrel32 @bar 52 53; After the call we expect to find new DBG_VALUE instructions for "s1". 54; CHECK: ADJCALLSTACKUP 55; CHECK-NOT: DBG_VALUE 56; 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 number 60;; of the earlier DBG_PHIs. 61; INSTRREF: ADJCALLSTACKUP 62; 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: ADD32rr 69 70entry: 71 %tmp.sroa.0 = alloca i64, align 8 72 %tmp.sroa.4 = alloca i64, align 8 73 call void @llvm.dbg.declare(metadata ptr %tmp.sroa.0, metadata !19, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 64)), !dbg !21 74 call void @llvm.dbg.declare(metadata ptr %tmp.sroa.4, metadata !19, metadata !DIExpression(DW_OP_LLVM_fragment, 64, 64)), !dbg !21 75 call void @llvm.dbg.value(metadata i64 %s1.coerce0, metadata !17, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 64)), !dbg !22 76 call void @llvm.dbg.value(metadata i64 %s1.coerce1, metadata !17, metadata !DIExpression(DW_OP_LLVM_fragment, 64, 64)), !dbg !22 77 call void @llvm.dbg.value(metadata i64 %s2.coerce0, metadata !18, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 64)), !dbg !23 78 call void @llvm.dbg.value(metadata i64 %s2.coerce1, metadata !18, metadata !DIExpression(DW_OP_LLVM_fragment, 64, 64)), !dbg !23 79 call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %tmp.sroa.0), !dbg !24 80 call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %tmp.sroa.4), !dbg !24 81 store volatile i64 0, ptr %tmp.sroa.0, align 8, !dbg !21 82 store volatile i64 0, ptr %tmp.sroa.4, align 8, !dbg !21 83 tail call void @bar(i64 %s1.coerce0, i64 %s1.coerce1, i64 %s2.coerce0, i64 %s2.coerce1, i64 0, i64 0) #4, !dbg !25 84 call void @llvm.dbg.value(metadata i64 %s2.coerce0, metadata !17, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 64)), !dbg !22 85 call void @llvm.dbg.value(metadata i64 %s2.coerce1, metadata !17, metadata !DIExpression(DW_OP_LLVM_fragment, 64, 64)), !dbg !22 86 %s2.coerce1.tr = trunc i64 %s2.coerce1 to i32, !dbg !26 87 %conv = shl i32 %s2.coerce1.tr, 1, !dbg !26 88 call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %tmp.sroa.0), !dbg !27 89 call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %tmp.sroa.4), !dbg !27 90 ret i32 %conv, !dbg !28 91} 92 93declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 94declare void @llvm.dbg.value(metadata, metadata, metadata) #1 95declare void @llvm.lifetime.start.p0(i64, ptr nocapture) #2 96declare void @llvm.lifetime.end.p0(i64, ptr nocapture) #2 97 98declare dso_local void @bar(i64, i64, i64, i64, i64, i64) local_unnamed_addr 99 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