; RUN: opt -passes=licm %s -S | FileCheck %s ; RUN: opt --try-experimental-debuginfo-iterators -passes=licm %s -S | FileCheck %s ;; Ensure that we correctly merge the DIAssignID's from the sunk stores, add it ;; to the new new store instruction, and update the dbg.assign intrinsics using ;; them to use it instead. ;; Generated from the following, with some changes to the IR by hand: ;; $ cat test.c ;; void b(int c) { ;; esc(&c); ;; for (; c; c++) // NOTE: I've added another store to c in the loop by hand. ;; ; ;; } ;; $ clang -O2 -Xclang -disable-llvm-passes -g -emit-llvm -S -o a.ll ;; $ opt -passes=declare-to-assign,sroa,instcombine,simplifycfg,loop-simplify,lcssa,loop-rotate a.ll ; CHECK-LABEL: for.inc: ;; Check that the stores have actually been removed from this block, otherwise ;; this test is useless. ; CHECK-NOT: store i32 %inc, ptr %c.addr ;; Check that the two dbg.assigns now have the same (merged) !DIAssingID ID. ; CHECK: call void @llvm.dbg.assign(metadata i32 %inc, metadata ![[VAR_C:[0-9]+]], metadata !DIExpression(), metadata ![[ID:[0-9]+]], metadata ptr %c.addr, metadata !DIExpression()), !dbg ; CHECK-NOT: store i32 %inc, ptr %c.addr ; CHECK: call void @llvm.dbg.assign(metadata i32 %inc, metadata ![[VAR_C]], metadata !DIExpression(), metadata ![[ID]], metadata ptr %c.addr, metadata !DIExpression()), !dbg ; CHECK-LABEL: for.cond.for.end_crit_edge: ; CHECK-NEXT: %[[PHI:.*]] = phi i32 [ %inc, %for.inc ] ; CHECK-NEXT: store i32 %[[PHI]], ptr %c.addr{{.*}}, !DIAssignID ![[ID]] ; CHECK-NOT: {{.*}}llvm.dbg{{.*}} ; CHECK-NEXT: br label %for.end ; CHECK: ![[VAR_C]] = !DILocalVariable(name: "c", define dso_local void @b(i32 %c) !dbg !7 { entry: %c.addr = alloca i32, align 4 store i32 %c, ptr %c.addr, align 4, !DIAssignID !36 call void @llvm.dbg.assign(metadata i32 %c, metadata !12, metadata !DIExpression(), metadata !36, metadata ptr %c.addr, metadata !DIExpression()), !dbg !13 call void @esc(ptr nonnull %c.addr), !dbg !18 %0 = load i32, ptr %c.addr, align 4, !dbg !19 %tobool.not1 = icmp eq i32 %0, 0, !dbg !22 br i1 %tobool.not1, label %for.end, label %for.inc.lr.ph, !dbg !22 for.inc.lr.ph: ; preds = %entry br label %for.inc, !dbg !22 for.inc: ; preds = %for.inc.lr.ph, %for.inc %1 = load i32, ptr %c.addr, align 4, !dbg !23 %inc = add nsw i32 %1, 1, !dbg !23 store i32 %inc, ptr %c.addr, align 4, !dbg !23, !DIAssignID !38 call void @llvm.dbg.assign(metadata i32 %inc, metadata !12, metadata !DIExpression(), metadata !38, metadata ptr %c.addr, metadata !DIExpression()), !dbg !13 ;; The following store and dbg.assign intrinsics are copies of those above, ;; with a new DIAssignID. store i32 %inc, ptr %c.addr, align 4, !dbg !23, !DIAssignID !37 call void @llvm.dbg.assign(metadata i32 %inc, metadata !12, metadata !DIExpression(), metadata !37, metadata ptr %c.addr, metadata !DIExpression()), !dbg !13 %2 = load i32, ptr %c.addr, align 4, !dbg !19 %tobool.not = icmp eq i32 %2, 0, !dbg !22 br i1 %tobool.not, label %for.cond.for.end_crit_edge, label %for.inc, !dbg !22, !llvm.loop !24 for.cond.for.end_crit_edge: ; preds = %for.inc br label %for.end, !dbg !22 for.end: ; preds = %for.cond.for.end_crit_edge, %entry ret void, !dbg !27 } declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata) declare !dbg !28 dso_local void @esc(ptr) !llvm.dbg.cu = !{!0} !llvm.module.flags = !{!3, !4, !5, !1000} !llvm.ident = !{!6} !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) !1 = !DIFile(filename: "test.c", directory: "/") !2 = !{} !3 = !{i32 7, !"Dwarf Version", i32 4} !4 = !{i32 2, !"Debug Info Version", i32 3} !5 = !{i32 1, !"wchar_size", i32 4} !6 = !{!"clang version 12.0.0"} !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) !8 = !DISubroutineType(types: !9) !9 = !{null, !10} !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) !11 = !{!12} !12 = !DILocalVariable(name: "c", arg: 1, scope: !7, file: !1, line: 2, type: !10) !13 = !DILocation(line: 0, scope: !7) !18 = !DILocation(line: 3, column: 3, scope: !7) !19 = !DILocation(line: 4, column: 10, scope: !20) !20 = distinct !DILexicalBlock(scope: !21, file: !1, line: 4, column: 3) !21 = distinct !DILexicalBlock(scope: !7, file: !1, line: 4, column: 3) !22 = !DILocation(line: 4, column: 3, scope: !21) !23 = !DILocation(line: 4, column: 15, scope: !20) !24 = distinct !{!24, !22, !25, !26} !25 = !DILocation(line: 5, column: 3, scope: !21) !26 = !{!"llvm.loop.mustprogress"} !27 = !DILocation(line: 6, column: 1, scope: !7) !28 = !DISubprogram(name: "esc", scope: !1, file: !1, line: 1, type: !29, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2) !29 = !DISubroutineType(types: !30) !30 = !{null, !31} !31 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64) !36 = distinct !DIAssignID() !37 = distinct !DIAssignID() !38 = distinct !DIAssignID() !1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true}