1; RUN: opt < %s -instcombine -instcombine-lower-dbg-declare=0 -S \ 2; RUN: | FileCheck %s --check-prefix=CHECK --check-prefix=NOLOWER 3; RUN: opt < %s -instcombine -instcombine-lower-dbg-declare=1 -S | FileCheck %s 4 5target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 6target triple = "x86_64--linux" 7 8%struct.TwoRegs = type { i64, i64 } 9 10declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone 11 12declare i64 @llvm.objectsize.i64.p0i8(i8*, i1) nounwind readnone 13 14declare i8* @passthru_callee(i8*, i32, i64, i64) 15 16define i8* @passthru(i8* %a, i32 %b, i64 %c) !dbg !1 { 17entry: 18 %a.addr = alloca i8*, align 8 19 %b.addr = alloca i32, align 4 20 %c.addr = alloca i64, align 8 21 store i8* %a, i8** %a.addr, align 8 22 call void @llvm.dbg.declare(metadata i8** %a.addr, metadata !0, metadata !DIExpression()), !dbg !16 23 store i32 %b, i32* %b.addr, align 4 24 call void @llvm.dbg.declare(metadata i32* %b.addr, metadata !7, metadata !DIExpression()), !dbg !18 25 store i64 %c, i64* %c.addr, align 8 26 call void @llvm.dbg.declare(metadata i64* %c.addr, metadata !9, metadata !DIExpression()), !dbg !20 27 %tmp = load i8*, i8** %a.addr, align 8, !dbg !21 28 %tmp1 = load i32, i32* %b.addr, align 4, !dbg !21 29 %tmp2 = load i64, i64* %c.addr, align 8, !dbg !21 30 %tmp3 = load i8*, i8** %a.addr, align 8, !dbg !21 31 %0 = call i64 @llvm.objectsize.i64.p0i8(i8* %tmp3, i1 false), !dbg !21 32 %call = call i8* @passthru_callee(i8* %tmp, i32 %tmp1, i64 %tmp2, i64 %0), !dbg !21 33 ret i8* %call, !dbg !21 34} 35 36; CHECK-LABEL: define i8* @passthru(i8* %a, i32 %b, i64 %c) 37; CHECK-NOT: alloca 38; CHECK-NOT: store 39; CHECK-NOT: call void @llvm.dbg.declare 40; CHECK: call void @llvm.dbg.value(metadata i8* %a, {{.*}}) 41; CHECK-NOT: store 42; CHECK: call void @llvm.dbg.value(metadata i32 %b, {{.*}}) 43; CHECK-NOT: store 44; CHECK: call void @llvm.dbg.value(metadata i64 %c, {{.*}}) 45; CHECK-NOT: store 46; CHECK: call i8* @passthru_callee(i8* %a, i32 %b, i64 %c, i64 %{{.*}}) 47 48declare void @tworegs_callee(i64, i64) 49 50; Lowering dbg.declare in instcombine doesn't handle this case very well. 51 52define void @tworegs(i64 %o.coerce0, i64 %o.coerce1) !dbg !31 { 53entry: 54 %o = alloca %struct.TwoRegs, align 8 55 %0 = bitcast %struct.TwoRegs* %o to { i64, i64 }* 56 %1 = getelementptr inbounds { i64, i64 }, { i64, i64 }* %0, i32 0, i32 0 57 store i64 %o.coerce0, i64* %1, align 8 58 %2 = getelementptr inbounds { i64, i64 }, { i64, i64 }* %0, i32 0, i32 1 59 store i64 %o.coerce1, i64* %2, align 8 60 call void @llvm.dbg.declare(metadata %struct.TwoRegs* %o, metadata !35, metadata !DIExpression()), !dbg !32 61 %3 = bitcast %struct.TwoRegs* %o to { i64, i64 }*, !dbg !33 62 %4 = getelementptr inbounds { i64, i64 }, { i64, i64 }* %3, i32 0, i32 0, !dbg !33 63 %5 = load i64, i64* %4, align 8, !dbg !33 64 %6 = getelementptr inbounds { i64, i64 }, { i64, i64 }* %3, i32 0, i32 1, !dbg !33 65 %7 = load i64, i64* %6, align 8, !dbg !33 66 call void @tworegs_callee(i64 %5, i64 %7), !dbg !33 67 ret void, !dbg !33 68} 69 70; NOLOWER-LABEL: define void @tworegs(i64 %o.coerce0, i64 %o.coerce1) 71; NOLOWER-NOT: alloca 72; NOLOWER-NOT: store 73; NOLOWER-NOT: call void @llvm.dbg.declare 74; Here we want to find: call void @llvm.dbg.value(metadata i64 %o.coerce0, metadata [[VARIABLE_O]], metadata !DIExpression(DW_OP_LLVM_fragment, 0, 64)) 75; NOLOWER: call void @llvm.dbg.value(metadata i64 undef, {{.*}}) 76; NOLOWER-NOT: store 77; Here we want to find: call void @llvm.dbg.value(metadata i64 %o.coerce1, metadata [[VARIABLE_O]], metadata !DIExpression(DW_OP_LLVM_fragment, 64, 64)) 78; NOLOWER: call void @llvm.dbg.value(metadata i64 undef, {{.*}}) 79; NOLOWER-NOT: store 80; NOLOWER: call void @tworegs_callee(i64 %o.coerce0, i64 %o.coerce1) 81 82 83!llvm.dbg.cu = !{!3} 84!llvm.module.flags = !{!30} 85 86!0 = !DILocalVariable(name: "a", line: 78, arg: 1, scope: !1, file: !2, type: !6) 87!1 = distinct !DISubprogram(name: "passthru", line: 79, isLocal: true, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !3, scopeLine: 79, file: !27, scope: !2, type: !4, retainedNodes: !25) 88!2 = !DIFile(filename: "string.h", directory: "Game") 89!3 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.0 (trunk 127710)", isOptimized: true, emissionKind: FullDebug, file: !28, enums: !29, retainedTypes: !29) 90!4 = !DISubroutineType(types: !5) 91!5 = !{!6} 92!6 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, scope: !3, baseType: null) 93!7 = !DILocalVariable(name: "b", line: 78, arg: 2, scope: !1, file: !2, type: !8) 94!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 95!9 = !DILocalVariable(name: "c", line: 78, arg: 3, scope: !1, file: !2, type: !12) 96!12 = !DIBasicType(tag: DW_TAG_base_type, name: "long unsigned int", size: 64, align: 64, encoding: DW_ATE_unsigned) 97!16 = !DILocation(line: 78, column: 28, scope: !1) 98!18 = !DILocation(line: 78, column: 40, scope: !1) 99!20 = !DILocation(line: 78, column: 54, scope: !1) 100!21 = !DILocation(line: 80, column: 3, scope: !22) 101!22 = distinct !DILexicalBlock(line: 80, column: 3, file: !27, scope: !23) 102!23 = distinct !DILexicalBlock(line: 79, column: 1, file: !27, scope: !1) 103!25 = !{!0, !7, !9} 104!27 = !DIFile(filename: "string.h", directory: "Game") 105!28 = !DIFile(filename: "bits.c", directory: "Game") 106!29 = !{} 107!30 = !{i32 1, !"Debug Info Version", i32 3} 108 109!31 = distinct !DISubprogram(name: "tworegs", scope: !28, file: !28, line: 4, type: !4, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: true, unit: !3, retainedNodes: !34) 110!32 = !DILocation(line: 4, column: 23, scope: !31) 111!33 = !DILocation(line: 5, column: 3, scope: !31) 112!34 = !{!35} 113!35 = !DILocalVariable(name: "o", arg: 1, scope: !31, file: !28, line: 4, type: !36) 114!36 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "TwoRegs", file: !28, line: 1, size: 128, elements: !37) 115!37 = !{!38, !39} 116!38 = !DIDerivedType(tag: DW_TAG_member, name: "x", scope: !36, file: !28, line: 1, baseType: !12, size: 64) 117!39 = !DIDerivedType(tag: DW_TAG_member, name: "y", scope: !36, file: !28, line: 1, baseType: !12, size: 64) 118!40 = !DISubroutineType(types: !41) 119!41 = !{!36} 120