1 ; RUN: opt -indvars -S < %s | FileCheck %s 2 ; 3 ; When the induction variable is widened by indvars, check that the debug loc 4 ; associated with the loop increment is correctly propagated. 5 ; Also, when the exit condition of a loop is rewritten to be a canonical != 6 ; comparison, check that the debug loc of the orginal comparison is reused. 7 ; 8 ; Test case obtained from the following source code: 9 ; 10 ; //// 11 ; extern int foo(int); // line 1 12 ; 13 ; int bar(int X, int *A) { 14 ; for (int i = 0; i < X; ++i) // line 4 15 ; A[i] = foo(i); 16 ; 17 ; return A[0]; 18 ; } 19 ; /// 20 ; 21 ; Check that the debug location for the loop increment still refers to 22 ; line 4, column 26, discriminator 2. 23 ; 24 ; Check that the canonicalized compare instruction for the loop exit 25 ; condition still refers to line 4, column 21, discriminator 1. 26 ; 27 ; CHECK-LABEL: for.body: 28 ; CHECK: [[PHI:%[0-9a-zA-Z.]+]] = phi i64 [ 29 ; CHECK-LABEL: for.inc: 30 ; CHECK: add nuw nsw i64 [[PHI]], 1, !dbg ![[INDVARMD:[0-9]+]] 31 ; CHECK: icmp ne i64 %{{.+}}, %{{.+}}, !dbg ![[ICMPMD:[0-9]+]] 32 ; CHECK-DAG: ![[ICMPMD]] = !DILocation(line: 4, column: 21, scope: ![[ICMPSCOPEMD:[0-9]+]] 33 ; CHECK-DAG: ![[ICMPSCOPEMD]] = !DILexicalBlockFile(scope: !{{[0-9]+}}, file: !{{[0-9]+}}, discriminator: 1) 34 ; CHECK-DAG: ![[INDVARMD]] = !DILocation(line: 4, column: 26, scope: ![[INDVARSCOPEMD:[0-9]+]]) 35 ; CHECK-DAG: ![[INDVARSCOPEMD]] = !DILexicalBlockFile(scope: !{{[0-9]+}}, file: !{{[0-9]+}}, discriminator: 2) 36 37 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 38 39 define i32 @bar(i32 %X, i32* %A) !dbg !5 { 40 entry: 41 %cmp5 = icmp sgt i32 %X, 0, !dbg !7 42 br i1 %cmp5, label %for.body.lr.ph, label %for.end, !dbg !9 43 44 for.body.lr.ph: 45 br label %for.body, !dbg !9 46 47 for.body: 48 %i.06 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.inc ] 49 %call = call i32 @foo(i32 %i.06), !dbg !10 50 %idxprom = sext i32 %i.06 to i64, !dbg !11 51 %arrayidx = getelementptr inbounds i32, i32* %A, i64 %idxprom, !dbg !11 52 store i32 %call, i32* %arrayidx, align 4, !dbg !12 53 br label %for.inc, !dbg !11 54 55 for.inc: 56 %inc = add nsw i32 %i.06, 1, !dbg !13 57 %cmp = icmp slt i32 %inc, %X, !dbg !7 58 br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge, !dbg !9, !llvm.loop !15 59 60 for.cond.for.end_crit_edge: 61 br label %for.end, !dbg !9 62 63 for.end: 64 %0 = load i32, i32* %A, align 4, !dbg !17 65 ret i32 %0, !dbg !18 66 } 67 68 declare i32 @foo(i32) 69 70 !llvm.dbg.cu = !{!0} 71 !llvm.module.flags = !{!3, !4} 72 73 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "", isOptimized: false, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2) 74 !1 = !DIFile(filename: "test.c", directory: "") 75 !2 = !{} 76 !3 = !{i32 2, !"Dwarf Version", i32 4} 77 !4 = !{i32 2, !"Debug Info Version", i32 3} 78 !5 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 3, type: !6, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) 79 !6 = !DISubroutineType(types: !2) 80 !7 = !DILocation(line: 4, column: 21, scope: !8) 81 !8 = !DILexicalBlockFile(scope: !5, file: !1, discriminator: 1) 82 !9 = !DILocation(line: 4, column: 3, scope: !8) 83 !10 = !DILocation(line: 5, column: 12, scope: !5) 84 !11 = !DILocation(line: 5, column: 5, scope: !5) 85 !12 = !DILocation(line: 5, column: 10, scope: !5) 86 !13 = !DILocation(line: 4, column: 26, scope: !14) 87 !14 = !DILexicalBlockFile(scope: !5, file: !1, discriminator: 2) 88 !15 = distinct !{!15, !16} 89 !16 = !DILocation(line: 4, column: 3, scope: !5) 90 !17 = !DILocation(line: 7, column: 10, scope: !5) 91 !18 = !DILocation(line: 7, column: 3, scope: !5) 92
