1; This test checks if debug loc is propagated to load/store created by GVN/Instcombine. 2; RUN: opt < %s -passes=gvn -S | FileCheck %s --check-prefixes=ALL 3; RUN: opt < %s -passes=gvn,instcombine -S | FileCheck %s --check-prefixes=ALL 4 5; struct node { 6; int *v; 7; struct desc *descs; 8; }; 9 10; struct desc { 11; struct node *node; 12; }; 13 14; extern int bar(void *v, void* n); 15 16; int test(struct desc *desc) 17; { 18; void *v, *n; 19; v = !desc ? ((void *)0) : desc->node->v; // Line 15 20; n = &desc->node->descs[0]; // Line 16 21; return bar(v, n); 22; } 23 24; Line 16, Column 13: 25; n = &desc->node->descs[0]; 26; ^ 27 28target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128" 29target triple = "aarch64--linux-gnu" 30 31%struct.desc = type { ptr } 32%struct.node = type { ptr, ptr } 33 34define i32 @test_no_null_opt(ptr readonly %desc) local_unnamed_addr #0 !dbg !4 { 35entry: 36 %tobool = icmp eq ptr %desc, null 37 br i1 %tobool, label %cond.end, label %cond.false, !dbg !9 38; ALL: %.pre = load ptr, ptr %desc, align 8, !dbg [[LOC_16_13:![0-9]+]] 39; ALL: br i1 %tobool, label %cond.end, label %cond.false, !dbg [[LOC_15_6:![0-9]+]] 40; ALL: cond.false: 41 42cond.false: 43 %0 = load ptr, ptr %desc, align 8, !dbg !11 44 %1 = load ptr, ptr %0, align 8 45 br label %cond.end, !dbg !9 46 47cond.end: 48; ALL: phi ptr [ %0, %cond.false ], [ null, %entry ] 49 50 %2 = phi ptr [ %1, %cond.false ], [ null, %entry ], !dbg !9 51 %3 = load ptr, ptr %desc, align 8, !dbg !10 52 %descs = getelementptr inbounds %struct.node, ptr %3, i64 0, i32 1 53 %4 = load ptr, ptr %descs, align 8 54 %call = tail call i32 @bar(ptr %2, ptr %4) 55 ret i32 %call 56} 57attributes #0 = { null_pointer_is_valid } 58 59declare i32 @bar(ptr, ptr) local_unnamed_addr #1 60!llvm.dbg.cu = !{!0} 61!llvm.module.flags = !{!2, !3} 62 63!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, emissionKind: FullDebug) 64!1 = !DIFile(filename: "test.c", directory: ".") 65!2 = !{i32 2, !"Dwarf Version", i32 4} 66!3 = !{i32 2, !"Debug Info Version", i32 3} 67!4 = distinct !DISubprogram(name: "test_no_null_opt", scope: !1, file: !1, line: 12, type: !5, isLocal: false, isDefinition: true, scopeLine: 13, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !8) 68!5 = !DISubroutineType(types: !6) 69!6 = !{!7} 70!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 71!8 = !{} 72!9 = !DILocation(line: 15, column: 6, scope: !4) 73!10 = !DILocation(line: 16, column: 13, scope: !4) 74!11 = !DILocation(line: 15, column: 34, scope: !4) 75 76;ALL: [[SCOPE:![0-9]+]] = distinct !DISubprogram(name: "test_no_null_opt",{{.*}} 77;ALL: [[LOC_16_13]] = !DILocation(line: 16, column: 13, scope: [[SCOPE]]) 78;ALL: [[LOC_15_6]] = !DILocation(line: 15, column: 6, scope: [[SCOPE]]) 79