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, 0, ![[X]], 15 ; CHECK: DBG_VALUE debug-use %rdi, debug-use _, ![[X]] 16 ; CHECK: bb.1.if.then: 17 ; CHECK: DBG_VALUE 43, 0, ![[X]], 18 ; CHECK: bb.2.if.end: 19 ; CHECK-NOT: DBG_VALUE 23, 0, ![[X]], 20 ; CHECK: RETQ %eax 21 22 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 23 target triple = "x86_64-apple-macosx10.11.0" 24 25 ; Function Attrs: nounwind ssp uwtable 26 define i32 @f() #0 !dbg !4 { 27 entry: 28 %x = alloca i32, align 4 29 %0 = bitcast i32* %x to i8*, !dbg !14 30 call void @llvm.lifetime.start(i64 4, i8* %0) #4, !dbg !14 31 tail call void @llvm.dbg.value(metadata i32 23, i64 0, metadata !9, metadata !15), !dbg !16 32 store i32 23, i32* %x, align 4, !dbg !16, !tbaa !17 33 tail call void @llvm.dbg.value(metadata i32* %x, i64 0, metadata !9, metadata !DIExpression(DW_OP_deref)), !dbg !16 34 call void @g(i32* nonnull %x) #4, !dbg !21 35 call void @llvm.dbg.value(metadata i32* %x, i64 0, metadata !9, metadata !DIExpression(DW_OP_deref)), !dbg !16 36 %1 = load i32, i32* %x, align 4, !dbg !22, !tbaa !17 37 %cmp = icmp eq i32 %1, 42, !dbg !24 38 br i1 %cmp, label %if.then, label %if.end, !dbg !25 39 40 if.then: ; preds = %entry 41 call void @llvm.dbg.value(metadata i32 43, i64 0, metadata !9, metadata !15), !dbg !16 42 store i32 43, i32* %x, align 4, !dbg !26, !tbaa !17 43 br label %if.end, !dbg !26 44 45 if.end: ; preds = %if.then, %entry 46 %2 = phi i32 [ 43, %if.then ], [ %1, %entry ], !dbg !27 47 call void @llvm.dbg.value(metadata i32* %x, i64 0, metadata !9, metadata !DIExpression(DW_OP_deref)), !dbg !16 48 call void @llvm.lifetime.end(i64 4, i8* %0) #4, !dbg !28 49 ret i32 %2, !dbg !29 50 } 51 52 ; Function Attrs: argmemonly nounwind 53 declare void @llvm.lifetime.start(i64, i8* nocapture) #1 54 55 declare void @g(i32*) #4 56 57 ; Function Attrs: argmemonly nounwind 58 declare void @llvm.lifetime.end(i64, i8* nocapture) #1 59 60 ; Function Attrs: nounwind readnone 61 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #3 62 63 attributes #0 = { nounwind ssp uwtable } 64 attributes #1 = { argmemonly nounwind } 65 attributes #3 = { nounwind readnone } 66 attributes #4 = { nounwind } 67 68 !llvm.dbg.cu = !{!0} 69 !llvm.module.flags = !{!10, !11, !12} 70 !llvm.ident = !{!13} 71 72 !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) 73 !1 = !DIFile(filename: "constant.c", directory: "") 74 !2 = !{} 75 !4 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 2, type: !5, isLocal: false, isDefinition: true, scopeLine: 2, isOptimized: true, unit: !0, variables: !8) 76 !5 = !DISubroutineType(types: !6) 77 !6 = !{!7} 78 !7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 79 !8 = !{!9} 80 !9 = !DILocalVariable(name: "x", scope: !4, file: !1, line: 3, type: !7) 81 !10 = !{i32 2, !"Dwarf Version", i32 2} 82 !11 = !{i32 2, !"Debug Info Version", i32 3} 83 !12 = !{i32 1, !"PIC Level", i32 2} 84 !13 = !{!"clang version 3.8.0 (trunk 255890) (llvm/trunk 255919)"} 85 !14 = !DILocation(line: 3, column: 3, scope: !4) 86 !15 = !DIExpression() 87 !16 = !DILocation(line: 3, column: 7, scope: !4) 88 !17 = !{!18, !18, i64 0} 89 !18 = !{!"int", !19, i64 0} 90 !19 = !{!"omnipotent char", !20, i64 0} 91 !20 = !{!"Simple C/C++ TBAA"} 92 !21 = !DILocation(line: 4, column: 3, scope: !4) 93 !22 = !DILocation(line: 5, column: 7, scope: !23) 94 !23 = distinct !DILexicalBlock(scope: !4, file: !1, line: 5, column: 7) 95 !24 = !DILocation(line: 5, column: 9, scope: !23) 96 !25 = !DILocation(line: 5, column: 7, scope: !4) 97 !26 = !DILocation(line: 6, column: 5, scope: !23) 98 !27 = !DILocation(line: 7, column: 10, scope: !4) 99 !28 = !DILocation(line: 8, column: 1, scope: !4) 100 !29 = !DILocation(line: 7, column: 3, scope: !4) 101
