1; RUN: llc -mtriple=x86_64-apple-macosx10.9.0 %s -stop-after=livedebugvars \ 2; RUN: -o - | FileCheck %s 3; Generated from: 4; void g(int *); 5; int f() { 6; int x = 23; 7; g(&x); 8; if (x == 42) 9; ++x; 10; return x; // check that x is not a constant here. 11; } 12; CHECK: ![[X:.*]] = !DILocalVariable(name: "x", 13; CHECK: bb.0.entry: 14; CHECK: DBG_VALUE 23, $noreg, ![[X]], 15; CHECK: DBG_VALUE $rsp, $noreg, ![[X]], !DIExpression(DW_OP_plus_uconst, 4, DW_OP_deref), 16; CHECK: bb.1.if.then: 17; CHECK: DBG_VALUE 43, $noreg, ![[X]], 18; CHECK: bb.2.if.end: 19; CHECK-NOT: DBG_VALUE 23, $noreg, ![[X]], 20; CHECK: RET64 $eax 21 22target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 23target triple = "x86_64-apple-macosx10.11.0" 24 25; Function Attrs: nounwind ssp uwtable 26define i32 @f() #0 !dbg !4 { 27entry: 28 %x = alloca i32, align 4 29 call void @llvm.lifetime.start(i64 4, ptr %x) #4, !dbg !14 30 tail call void @llvm.dbg.value(metadata i32 23, metadata !9, metadata !15), !dbg !16 31 store i32 23, ptr %x, align 4, !dbg !16, !tbaa !17 32 tail call void @llvm.dbg.value(metadata ptr %x, metadata !9, metadata !DIExpression(DW_OP_deref)), !dbg !16 33 call void @g(ptr nonnull %x) #4, !dbg !21 34 call void @llvm.dbg.value(metadata ptr %x, metadata !9, metadata !DIExpression(DW_OP_deref)), !dbg !16 35 %0 = load i32, ptr %x, align 4, !dbg !22, !tbaa !17 36 %cmp = icmp eq i32 %0, 42, !dbg !24 37 br i1 %cmp, label %if.then, label %if.end, !dbg !25 38 39if.then: ; preds = %entry 40 call void @llvm.dbg.value(metadata i32 43, metadata !9, metadata !15), !dbg !16 41 store i32 43, ptr %x, align 4, !dbg !26, !tbaa !17 42 br label %if.end, !dbg !26 43 44if.end: ; preds = %if.then, %entry 45 %1 = phi i32 [ 43, %if.then ], [ %0, %entry ], !dbg !27 46 call void @llvm.dbg.value(metadata ptr %x, metadata !9, metadata !DIExpression(DW_OP_deref)), !dbg !16 47 call void @llvm.lifetime.end(i64 4, ptr %x) #4, !dbg !28 48 ret i32 %1, !dbg !29 49} 50 51; Function Attrs: argmemonly nounwind 52declare void @llvm.lifetime.start(i64, ptr nocapture) #1 53 54declare void @g(ptr) #4 55 56; Function Attrs: argmemonly nounwind 57declare void @llvm.lifetime.end(i64, ptr nocapture) #1 58 59; Function Attrs: nounwind readnone 60declare void @llvm.dbg.value(metadata, metadata, metadata) #3 61 62attributes #0 = { nounwind ssp uwtable } 63attributes #1 = { argmemonly nounwind } 64attributes #3 = { nounwind readnone } 65attributes #4 = { nounwind } 66 67!llvm.dbg.cu = !{!0} 68!llvm.module.flags = !{!10, !11, !12} 69!llvm.ident = !{!13} 70 71!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.8.0 (trunk 255890) (llvm/trunk 255919)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) 72!1 = !DIFile(filename: "constant.c", directory: "") 73!2 = !{} 74!4 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 2, type: !5, isLocal: false, isDefinition: true, scopeLine: 2, isOptimized: true, unit: !0, retainedNodes: !8) 75!5 = !DISubroutineType(types: !6) 76!6 = !{!7} 77!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 78!8 = !{!9} 79!9 = !DILocalVariable(name: "x", scope: !4, file: !1, line: 3, type: !7) 80!10 = !{i32 2, !"Dwarf Version", i32 2} 81!11 = !{i32 2, !"Debug Info Version", i32 3} 82!12 = !{i32 1, !"PIC Level", i32 2} 83!13 = !{!"clang version 3.8.0 (trunk 255890) (llvm/trunk 255919)"} 84!14 = !DILocation(line: 3, column: 3, scope: !4) 85!15 = !DIExpression() 86!16 = !DILocation(line: 3, column: 7, scope: !4) 87!17 = !{!18, !18, i64 0} 88!18 = !{!"int", !19, i64 0} 89!19 = !{!"omnipotent char", !20, i64 0} 90!20 = !{!"Simple C/C++ TBAA"} 91!21 = !DILocation(line: 4, column: 3, scope: !4) 92!22 = !DILocation(line: 5, column: 7, scope: !23) 93!23 = distinct !DILexicalBlock(scope: !4, file: !1, line: 5, column: 7) 94!24 = !DILocation(line: 5, column: 9, scope: !23) 95!25 = !DILocation(line: 5, column: 7, scope: !4) 96!26 = !DILocation(line: 6, column: 5, scope: !23) 97!27 = !DILocation(line: 7, column: 10, scope: !4) 98!28 = !DILocation(line: 8, column: 1, scope: !4) 99!29 = !DILocation(line: 7, column: 3, scope: !4) 100