1; RUN: opt -passes=licm %s -S | FileCheck %s 2; RUN: opt --try-experimental-debuginfo-iterators -passes=licm %s -S | FileCheck %s 3 4;; Ensure that we correctly merge the DIAssignID's from the sunk stores, add it 5;; to the new new store instruction, and update the dbg.assign intrinsics using 6;; them to use it instead. 7 8;; Generated from the following, with some changes to the IR by hand: 9;; $ cat test.c 10;; void b(int c) { 11;; esc(&c); 12;; for (; c; c++) // NOTE: I've added another store to c in the loop by hand. 13;; ; 14;; } 15;; $ clang -O2 -Xclang -disable-llvm-passes -g -emit-llvm -S -o a.ll 16;; $ opt -passes=declare-to-assign,sroa,instcombine,simplifycfg,loop-simplify,lcssa,loop-rotate a.ll 17 18; CHECK-LABEL: for.inc: 19;; Check that the stores have actually been removed from this block, otherwise 20;; this test is useless. 21; CHECK-NOT: store i32 %inc, ptr %c.addr 22;; Check that the two dbg.assigns now have the same (merged) !DIAssingID ID. 23; CHECK: #dbg_assign(i32 %inc, ![[VAR_C:[0-9]+]], !DIExpression(), ![[ID:[0-9]+]], ptr %c.addr, !DIExpression(), 24; CHECK-NOT: store i32 %inc, ptr %c.addr 25; CHECK: #dbg_assign(i32 %inc, ![[VAR_C]], !DIExpression(), ![[ID]], ptr %c.addr, !DIExpression(), 26 27; CHECK-LABEL: for.cond.for.end_crit_edge: 28; CHECK-NEXT: %[[PHI:.*]] = phi i32 [ %inc, %for.inc ] 29; CHECK-NEXT: store i32 %[[PHI]], ptr %c.addr{{.*}}, !DIAssignID ![[ID]] 30; CHECK-NOT: {{.*}}llvm.dbg{{.*}} 31; CHECK-NEXT: br label %for.end 32 33; CHECK: ![[VAR_C]] = !DILocalVariable(name: "c", 34 35define dso_local void @b(i32 %c) !dbg !7 { 36entry: 37 %c.addr = alloca i32, align 4 38 store i32 %c, ptr %c.addr, align 4, !DIAssignID !36 39 call void @llvm.dbg.assign(metadata i32 %c, metadata !12, metadata !DIExpression(), metadata !36, metadata ptr %c.addr, metadata !DIExpression()), !dbg !13 40 call void @esc(ptr nonnull %c.addr), !dbg !18 41 %0 = load i32, ptr %c.addr, align 4, !dbg !19 42 %tobool.not1 = icmp eq i32 %0, 0, !dbg !22 43 br i1 %tobool.not1, label %for.end, label %for.inc.lr.ph, !dbg !22 44 45for.inc.lr.ph: ; preds = %entry 46 br label %for.inc, !dbg !22 47 48for.inc: ; preds = %for.inc.lr.ph, %for.inc 49 %1 = load i32, ptr %c.addr, align 4, !dbg !23 50 %inc = add nsw i32 %1, 1, !dbg !23 51 store i32 %inc, ptr %c.addr, align 4, !dbg !23, !DIAssignID !38 52 call void @llvm.dbg.assign(metadata i32 %inc, metadata !12, metadata !DIExpression(), metadata !38, metadata ptr %c.addr, metadata !DIExpression()), !dbg !13 53 ;; The following store and dbg.assign intrinsics are copies of those above, 54 ;; with a new DIAssignID. 55 store i32 %inc, ptr %c.addr, align 4, !dbg !23, !DIAssignID !37 56 call void @llvm.dbg.assign(metadata i32 %inc, metadata !12, metadata !DIExpression(), metadata !37, metadata ptr %c.addr, metadata !DIExpression()), !dbg !13 57 %2 = load i32, ptr %c.addr, align 4, !dbg !19 58 %tobool.not = icmp eq i32 %2, 0, !dbg !22 59 br i1 %tobool.not, label %for.cond.for.end_crit_edge, label %for.inc, !dbg !22, !llvm.loop !24 60 61for.cond.for.end_crit_edge: ; preds = %for.inc 62 br label %for.end, !dbg !22 63 64for.end: ; preds = %for.cond.for.end_crit_edge, %entry 65 ret void, !dbg !27 66} 67 68 69declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata) 70declare !dbg !28 dso_local void @esc(ptr) 71 72!llvm.dbg.cu = !{!0} 73!llvm.module.flags = !{!3, !4, !5, !1000} 74!llvm.ident = !{!6} 75 76!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 12.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None) 77!1 = !DIFile(filename: "test.c", directory: "/") 78!2 = !{} 79!3 = !{i32 7, !"Dwarf Version", i32 4} 80!4 = !{i32 2, !"Debug Info Version", i32 3} 81!5 = !{i32 1, !"wchar_size", i32 4} 82!6 = !{!"clang version 12.0.0"} 83!7 = distinct !DISubprogram(name: "b", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11) 84!8 = !DISubroutineType(types: !9) 85!9 = !{null, !10} 86!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 87!11 = !{!12} 88!12 = !DILocalVariable(name: "c", arg: 1, scope: !7, file: !1, line: 2, type: !10) 89!13 = !DILocation(line: 0, scope: !7) 90!18 = !DILocation(line: 3, column: 3, scope: !7) 91!19 = !DILocation(line: 4, column: 10, scope: !20) 92!20 = distinct !DILexicalBlock(scope: !21, file: !1, line: 4, column: 3) 93!21 = distinct !DILexicalBlock(scope: !7, file: !1, line: 4, column: 3) 94!22 = !DILocation(line: 4, column: 3, scope: !21) 95!23 = !DILocation(line: 4, column: 15, scope: !20) 96!24 = distinct !{!24, !22, !25, !26} 97!25 = !DILocation(line: 5, column: 3, scope: !21) 98!26 = !{!"llvm.loop.mustprogress"} 99!27 = !DILocation(line: 6, column: 1, scope: !7) 100!28 = !DISubprogram(name: "esc", scope: !1, file: !1, line: 1, type: !29, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2) 101!29 = !DISubroutineType(types: !30) 102!30 = !{null, !31} 103!31 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64) 104!36 = distinct !DIAssignID() 105!37 = distinct !DIAssignID() 106!38 = distinct !DIAssignID() 107!1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true} 108