1 ; RUN: llc -stop-after=machine-sink < %s | FileCheck %s 2 ; 3 ; test code: 4 ; 1 extern int bar(int x); 5 ; 2 6 ; 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 a 20 ; debug location of line 6 (branches in entry and for.body block). Make sure that 21 ; these debug locations are propaged correctly to lowered instructions. 22 ; 23 ; CHECK: [[DLOC:![0-9]+]] = !DILocation(line: 6 24 ; CHECK-DAG: [[VREG1:%[^ ]+]]:gr64 = COPY $rsi 25 ; CHECK-DAG: [[VREG2:%[^ ]+]]:gr64 = COPY $rdi 26 ; CHECK: SUB64rr [[VREG2]], [[VREG1]] 27 ; CHECK-NEXT: JNE_1 {{.*}}, debug-location [[DLOC]]{{$}} 28 ; CHECK: [[VREG3:%[^ ]+]]:gr64 = PHI [[VREG2]] 29 ; CHECK: [[VREG4:%[^ ]+]]:gr64 = ADD64ri8 [[VREG3]], 4 30 ; CHECK: SUB64rr [[VREG1]], [[VREG4]] 31 ; CHECK-NEXT: JNE_1 {{.*}}, debug-location [[DLOC]]{{$}} 32 ; CHECK-NEXT: JMP_1 {{.*}}, debug-location [[DLOC]]{{$}} 33 34 target triple = "x86_64-unknown-linux-gnu" 35 36 define i32 @foo(i32* readonly %begin, i32* readnone %end) !dbg !4 { 37 entry: 38 %cmp6 = icmp eq i32* %begin, %end, !dbg !9 39 br i1 %cmp6, label %for.end, label %for.body.preheader, !dbg !12 40 41 for.body.preheader: ; preds = %entry 42 br label %for.body, !dbg !13 43 44 for.body: ; preds = %for.body.preheader, %for.body 45 %ret.08 = phi i32 [ %add, %for.body ], [ 0, %for.body.preheader ] 46 %i.07 = phi i32* [ %incdec.ptr, %for.body ], [ %begin, %for.body.preheader ] 47 %0 = load i32, i32* %i.07, align 4, !dbg !13, !tbaa !15 48 %call = tail call i32 @bar(i32 %0), !dbg !19 49 %add = add nsw i32 %call, %ret.08, !dbg !20 50 %incdec.ptr = getelementptr inbounds i32, i32* %i.07, i64 1, !dbg !21 51 %cmp = icmp eq i32* %incdec.ptr, %end, !dbg !9 52 br i1 %cmp, label %for.end.loopexit, label %for.body, !dbg !12, !llvm.loop !22 53 54 for.end.loopexit: ; preds = %for.body 55 br label %for.end, !dbg !24 56 57 for.end: ; preds = %for.end.loopexit, %entry 58 %ret.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.end.loopexit ] 59 ret i32 %ret.0.lcssa, !dbg !24 60 } 61 62 declare 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
