1; REQUIRES: object-emission 2 3; Make sure the fake use of 'b' at the end of 'foo' causes location information for 'b' 4; to extend all the way to the end of the function. 5 6; RUN: %llc_dwarf -O2 -filetype=obj -mtriple=x86_64-unknown-linux -dwarf-linkage-names=Abstract < %s | llvm-dwarfdump --debug-info --debug-line -v - -o %t 7; RUN: %python %p/../Inputs/check-fake-use.py %t 8; RUN: sed -e 's,call void (...) @llvm.fake.use,;,' %s | %llc_dwarf - -O2 -filetype=obj -mtriple=x86_64-unknown-linux -dwarf-linkage-names=Abstract | llvm-dwarfdump --debug-info --debug-line -v - -o %t 9; RUN: not %python %p/../Inputs/check-fake-use.py %t 10 11; Generated with: 12; clang -O2 -g -S -emit-llvm -fextend-variable-liveness=this fake-use.c 13; 14; int glob[10]; 15; extern void bar(); 16; 17; int foo(int b, int i) 18; { 19; int loc = glob[i] * 2; 20; if (b) { 21; glob[2] = loc; 22; bar(); 23; } 24; return loc; 25; } 26; 27; ModuleID = 't2.c' 28source_filename = "t2.c" 29 30@glob = common local_unnamed_addr global [10 x i32] zeroinitializer, align 16, !dbg !0 31 32; Function Attrs: nounwind sspstrong uwtable 33define i32 @foo(i32 %b, i32 %i) local_unnamed_addr optdebug !dbg !13 { 34entry: 35 #dbg_value(i32 %b, !17, !20, !21) 36 %c = add i32 %b, 42 37 %tobool = icmp sgt i32 %c, 2, !dbg !27 38 tail call void asm sideeffect "", "~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"() 39 tail call void (...) @bar() #2, !dbg !32 40 %idxprom = sext i32 %i to i64, !dbg !22 41 %arrayidx = getelementptr inbounds [10 x i32], [10 x i32]* @glob, i64 0, i64 %idxprom, !dbg !22 42 %0 = load i32, i32* %arrayidx, align 4, !dbg !22, !tbaa !23 43 %mul = shl nsw i32 %0, 1, !dbg !22 44 br i1 %tobool, label %if.end, label %if.then, !dbg !29 45 46if.then: ; preds = %entry 47 store i32 %mul, i32* getelementptr inbounds ([10 x i32], [10 x i32]* @glob, i64 0, i64 2), align 8, !dbg !30, !tbaa !23 48 tail call void (...) @bar() #2, !dbg !32 49 br label %if.end, !dbg !33 50 51if.end: ; preds = %entry, %if.then 52 call void (...) @llvm.fake.use(i32 %b), !dbg !34 53 ret i32 %mul, !dbg !35 54} 55 56declare void @bar(...) local_unnamed_addr 57 58!llvm.dbg.cu = !{!1} 59!llvm.module.flags = !{!9, !10, !11} 60!llvm.ident = !{!12} 61 62!0 = distinct !DIGlobalVariableExpression(var: !DIGlobalVariable(name: "glob", scope: !1, file: !2, line: 1, type: !5, isLocal: false, isDefinition: true), expr: !DIExpression()) 63!1 = distinct !DICompileUnit(language: DW_LANG_C99, file: !2, producer: "clang version 4.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !3, globals: !4) 64!2 = !DIFile(filename: "t2.c", directory: "/") 65!3 = !{} 66!4 = !{!0} 67!5 = !DICompositeType(tag: DW_TAG_array_type, baseType: !6, size: 320, align: 32, elements: !7) 68!6 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 69!7 = !{!8} 70!8 = !DISubrange(count: 10) 71!9 = !{i32 2, !"Dwarf Version", i32 4} 72!10 = !{i32 2, !"Debug Info Version", i32 3} 73!11 = !{i32 1, !"PIC Level", i32 2} 74!12 = !{!"clang version 4.0.0"} 75!13 = distinct !DISubprogram(name: "foo", scope: !2, file: !2, line: 4, type: !14, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !1, retainedNodes: !16) 76!14 = !DISubroutineType(types: !15) 77!15 = !{!6, !6, !6} 78!16 = !{!17, !19} 79!17 = !DILocalVariable(name: "b", arg: 1, scope: !13, file: !2, line: 4, type: !6) 80!19 = !DILocalVariable(name: "loc", scope: !13, file: !2, line: 6, type: !6) 81!20 = !DIExpression() 82!21 = !DILocation(line: 4, scope: !13) 83!22 = !DILocation(line: 6, scope: !13) 84!23 = !{!24, !24, i64 0} 85!24 = !{!"int", !25, i64 0} 86!25 = !{!"omnipotent char", !26, i64 0} 87!26 = !{!"Simple C/C++ TBAA"} 88!27 = !DILocation(line: 7, scope: !28) 89!28 = distinct !DILexicalBlock(scope: !13, file: !2, line: 7) 90!29 = !DILocation(line: 7, scope: !13) 91!30 = !DILocation(line: 8, scope: !31) 92!31 = distinct !DILexicalBlock(scope: !28, file: !2, line: 7) 93!32 = !DILocation(line: 9, scope: !31) 94!33 = !DILocation(line: 10, scope: !31) 95!34 = !DILocation(line: 12, scope: !13) 96!35 = !DILocation(line: 11, scope: !13) 97