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1; RUN: llc -stop-after=machine-sink < %s | FileCheck %s2;3; test code:4; 1 extern int bar(int x);5; 26; 3 int foo(int *begin, int *end) {7; 4 int *i;8; 5 int ret = 0;9; 6 for (10; 7 i = begin ;11; 8 i != end ;12; 9 i++)13; 10 {14; 11 ret += bar(*i);15; 12 }16; 13 return ret;17; 14 }18;19; With the test code, LLVM-IR below shows that loop-control branches have a20; debug location of line 6 (branches in entry and for.body block). Make sure that21; these debug locations are propaged correctly to lowered instructions.22;23; CHECK: [[DLOC:![0-9]+]] = !DILocation(line: 624; CHECK-DAG: [[VREG1:%[^ ]+]]:gr64 = COPY $rsi25; CHECK-DAG: [[VREG2:%[^ ]+]]:gr64 = COPY $rdi26; CHECK: SUB64rr [[VREG2]], [[VREG1]]27; CHECK-NEXT: JCC_1 {{.*}}, debug-location [[DLOC]]{{$}}28; CHECK: [[VREG3:%[^ ]+]]:gr64 = PHI [[VREG2]]29; CHECK: [[VREG4:%[^ ]+]]:gr64 = nuw ADD64ri32 [[VREG3]], 430; CHECK: SUB64rr [[VREG4]], [[VREG1]]31; CHECK-NEXT: JCC_1 {{.*}}, debug-location [[DLOC]]{{$}}32; CHECK-NEXT: JMP_1 {{.*}}, debug-location [[DLOC]]{{$}}33 34target triple = "x86_64-unknown-linux-gnu"35 36define i32 @foo(ptr readonly %begin, ptr readnone %end) !dbg !4 {37entry:38 %cmp6 = icmp eq ptr %begin, %end, !dbg !939 br i1 %cmp6, label %for.end, label %for.body.preheader, !dbg !1240 41for.body.preheader: ; preds = %entry42 br label %for.body, !dbg !1343 44for.body: ; preds = %for.body.preheader, %for.body45 %ret.08 = phi i32 [ %add, %for.body ], [ 0, %for.body.preheader ]46 %i.07 = phi ptr [ %incdec.ptr, %for.body ], [ %begin, %for.body.preheader ]47 %0 = load i32, ptr %i.07, align 4, !dbg !13, !tbaa !1548 %call = tail call i32 @bar(i32 %0), !dbg !1949 %add = add nsw i32 %call, %ret.08, !dbg !2050 %incdec.ptr = getelementptr inbounds i32, ptr %i.07, i64 1, !dbg !2151 %cmp = icmp eq ptr %incdec.ptr, %end, !dbg !952 br i1 %cmp, label %for.end.loopexit, label %for.body, !dbg !12, !llvm.loop !2253 54for.end.loopexit: ; preds = %for.body55 br label %for.end, !dbg !2456 57for.end: ; preds = %for.end.loopexit, %entry58 %ret.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.end.loopexit ]59 ret i32 %ret.0.lcssa, !dbg !2460}61 62declare i32 @bar(i32)63 64!llvm.dbg.cu = !{!0}65!llvm.module.flags = !{!2, !3}66 67!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1)68!1 = !DIFile(filename: "foo.c", directory: "b/")69!2 = !{i32 2, !"Dwarf Version", i32 4}70!3 = !{i32 2, !"Debug Info Version", i32 3}71!4 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !5, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0)72!5 = !DISubroutineType(types: !6)73!6 = !{!7, !8, !8}74!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)75!8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64)76!9 = !DILocation(line: 8, column: 9, scope: !10)77!10 = distinct !DILexicalBlock(scope: !11, file: !1, line: 6, column: 3)78!11 = distinct !DILexicalBlock(scope: !4, file: !1, line: 6, column: 3)79!12 = !DILocation(line: 6, column: 3, scope: !11)80!13 = !DILocation(line: 11, column: 18, scope: !14)81!14 = distinct !DILexicalBlock(scope: !10, file: !1, line: 10, column: 3)82!15 = !{!16, !16, i64 0}83!16 = !{!"int", !17, i64 0}84!17 = !{!"omnipotent char", !18, i64 0}85!18 = !{!"Simple C/C++ TBAA"}86!19 = !DILocation(line: 11, column: 14, scope: !14)87!20 = !DILocation(line: 11, column: 11, scope: !14)88!21 = !DILocation(line: 9, column: 8, scope: !10)89!22 = distinct !{!22, !12, !23}90!23 = !DILocation(line: 12, column: 3, scope: !11)91!24 = !DILocation(line: 13, column: 3, scope: !4)92