1; RUN: opt -passes=instcombine -S %s | FileCheck %s 2 3define dso_local void @_Z1fv() { 4 %1 = alloca i32, align 4 5 call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) 6 call void @llvm.dbg.declare(metadata ptr %1, metadata !16, metadata !DIExpression()), !dbg !19 7; CHECK: %[[A:.*]] = alloca i32, align 4 8; CHECK: #dbg_value(ptr %[[A]], {{.*}}, !DIExpression(DW_OP_deref) 9; CHECK: call void @_Z1gPv 10 call void @_Z1gPv(ptr nonnull %1) 11; CHECK-NOT: #dbg_value 12; CHECK: call void @_Z1gPv 13 call void @_Z1gPv(ptr nonnull %1) 14 call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) 15 ret void, !dbg !21 16} 17 18define dso_local void @_Z2fv() { 19 %1 = alloca i32, align 4 20 call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) 21 call void @llvm.dbg.declare(metadata ptr %1, metadata !16, metadata !DIExpression()), !dbg !19 22; CHECK: %[[A:.*]] = alloca i32, align 4 23; CHECK: #dbg_value(ptr %[[A]], {{.*}}, !DIExpression(DW_OP_deref) 24; CHECK: call void @_Z1gPv 25 call void @_Z1gPv(ptr nonnull %1) 26 br label %block2 27 28block2: 29; CHECK: #dbg_value(ptr %[[A]], {{.*}}, !DIExpression(DW_OP_deref) 30; CHECK: call void @_Z1gPv 31 call void @_Z1gPv(ptr nonnull %1) 32 call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) 33 ret void, !dbg !21 34} 35 36declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) 37declare void @llvm.dbg.declare(metadata, metadata, metadata) 38declare dso_local void @_Z1gPv(ptr) 39declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) 40 41!llvm.dbg.cu = !{!0} 42!llvm.module.flags = !{!8, !9, !10} 43 44!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 10.0.0 (git@github.com:llvm/llvm-project.git cab64b5708f614c71d275ec9d134e68b8c3baedd)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None) 45!1 = !DIFile(filename: "dbg.cc", directory: "/tmp") 46!2 = !{} 47!3 = !{!4, !5} 48!4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64) 49!5 = !DISubprogram(name: "g", linkageName: "_Z1gPv", scope: !1, file: !1, line: 1, type: !6, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2) 50!6 = !DISubroutineType(types: !7) 51!7 = !{null, !4} 52!8 = !{i32 7, !"Dwarf Version", i32 4} 53!9 = !{i32 2, !"Debug Info Version", i32 3} 54!10 = !{i32 1, !"wchar_size", i32 4} 55!12 = distinct !DISubprogram(name: "f", linkageName: "_Z1fv", scope: !1, file: !1, line: 2, type: !13, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !15) 56!13 = !DISubroutineType(types: !14) 57!14 = !{null} 58!15 = !{!16} 59!16 = !DILocalVariable(name: "x", scope: !12, file: !1, line: 3, type: !17) 60!17 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 61!18 = !DILocation(line: 3, column: 3, scope: !12) 62!19 = !DILocation(line: 3, column: 7, scope: !12) 63!20 = !DILocation(line: 4, column: 3, scope: !12) 64!21 = !DILocation(line: 5, column: 1, scope: !12) 65