| ; RUN: opt -loop-unroll -unroll-runtime -unroll-allow-remainder -unroll-count=4 -unroll-remainder -S %s -o - | FileCheck %s |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| @b = common local_unnamed_addr global i32 0, align 4, !dbg !0 |
| @a = common local_unnamed_addr global i32* null, align 8, !dbg !6 |
| |
| ; Test that loop remainder unrolling doesn't corrupt debuginfo. This example |
| ; used to cause an assert, but also test that the unrolled backwards branches |
| ; have the same DILocation. |
| |
| ; CHECK-LABEL: func_c |
| ; CHECK-LABEL: for.body.lr.ph: |
| ; CHECK: br i1 %[[CMP0:.*]], label %[[PRE:.*]], label %for.body.prol.loopexit, !dbg !24 |
| ; CHECK-LABEL: for.body: |
| ; CHECK: br i1 %[[CMP1:.*]], label %[[CRIT_EDGE:.*]], label %for.body, !dbg !24, !llvm.loop !30 |
| ; CHECK-LABEL: for.cond.for.end_crit_edge: |
| ; CHECK: br label %for.end, !dbg !24 |
| ; CHECK-LABEL: for.body.prol.1: |
| ; CHECK: br i1 %[[CMP2:.*]], label %for.body.prol.2, label %[[EXIT:.*]], !dbg !24 |
| ; CHECK-LABEL: for.body.prol.2: |
| define i32 @func_c() local_unnamed_addr #0 !dbg !14 { |
| entry: |
| %.pr = load i32, i32* @b, align 4, !dbg !17, !tbaa !20 |
| %tobool1 = icmp eq i32 %.pr, 0, !dbg !24 |
| br i1 %tobool1, label %for.end, label %for.body.lr.ph, !dbg !24 |
| |
| for.body.lr.ph: |
| %a.promoted = load i32*, i32** @a, align 8, !dbg !25, !tbaa !26 |
| %0 = sub i32 -2, %.pr, !dbg !24 |
| %1 = and i32 %0, -2, !dbg !24 |
| %2 = add i32 %.pr, %1, !dbg !24 |
| br label %for.body, !dbg !24 |
| |
| for.body: |
| %3 = phi i32* [ %a.promoted, %for.body.lr.ph ], [ %6, %for.body ], !dbg !28 |
| %4 = phi i32 [ %.pr, %for.body.lr.ph ], [ %add, %for.body ] |
| %arrayidx = getelementptr inbounds i32, i32* %3, i64 1, !dbg !28 |
| %5 = load i32, i32* %arrayidx, align 4, !dbg !28, !tbaa !20 |
| %conv = sext i32 %5 to i64, !dbg !28 |
| %6 = inttoptr i64 %conv to i32*, !dbg !28 |
| %add = add nsw i32 %4, 2, !dbg !29 |
| %tobool = icmp eq i32 %add, 0, !dbg !24 |
| br i1 %tobool, label %for.cond.for.end_crit_edge, label %for.body, !dbg !24, !llvm.loop !30 |
| |
| for.cond.for.end_crit_edge: |
| %7 = add i32 %2, 2, !dbg !24 |
| store i32* %6, i32** @a, align 8, !dbg !25, !tbaa !26 |
| store i32 %7, i32* @b, align 4, !dbg !32, !tbaa !20 |
| br label %for.end, !dbg !24 |
| |
| for.end: |
| ret i32 undef, !dbg !33 |
| } |
| |
| ; CHECK-LABEL: func_d |
| define void @func_d() local_unnamed_addr #1 !dbg !34 { |
| entry: |
| ret void, !dbg !37 |
| } |
| |
| attributes #0 = { norecurse nounwind uwtable } |
| attributes #0 = { norecurse nounwind readnone uwtable } |
| |
| !llvm.dbg.cu = !{!2} |
| !llvm.module.flags = !{!10, !11, !12} |
| !llvm.ident = !{!13} |
| |
| !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) |
| !1 = distinct !DIGlobalVariable(name: "b", scope: !2, file: !3, line: 2, type: !9, isLocal: false, isDefinition: true) |
| !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 6.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5) |
| !3 = !DIFile(filename: "loop.c", directory: "/work/projects/src/tests/unroll-debug-info") |
| !4 = !{} |
| !5 = !{!6, !0} |
| !6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression()) |
| !7 = distinct !DIGlobalVariable(name: "a", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true) |
| !8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 64) |
| !9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !10 = !{i32 2, !"Dwarf Version", i32 4} |
| !11 = !{i32 2, !"Debug Info Version", i32 3} |
| !12 = !{i32 1, !"wchar_size", i32 4} |
| !13 = !{!"clang version 6.0.0"} |
| !14 = distinct !DISubprogram(name: "c", scope: !3, file: !3, line: 3, type: !15, isLocal: false, isDefinition: true, scopeLine: 3, isOptimized: true, unit: !2, retainedNodes: !4) |
| !15 = !DISubroutineType(types: !16) |
| !16 = !{!9} |
| !17 = !DILocation(line: 4, column: 12, scope: !18) |
| !18 = distinct !DILexicalBlock(scope: !19, file: !3, line: 4, column: 5) |
| !19 = distinct !DILexicalBlock(scope: !14, file: !3, line: 4, column: 5) |
| !20 = !{!21, !21, i64 0} |
| !21 = !{!"int", !22, i64 0} |
| !22 = !{!"omnipotent char", !23, i64 0} |
| !23 = !{!"Simple C/C++ TBAA"} |
| !24 = !DILocation(line: 4, column: 5, scope: !19) |
| !25 = !DILocation(line: 5, column: 13, scope: !18) |
| !26 = !{!27, !27, i64 0} |
| !27 = !{!"any pointer", !22, i64 0} |
| !28 = !DILocation(line: 5, column: 15, scope: !18) |
| !29 = !DILocation(line: 4, column: 21, scope: !18) |
| !30 = distinct !{!30, !24, !31} |
| !31 = !DILocation(line: 5, column: 18, scope: !19) |
| !32 = !DILocation(line: 4, column: 17, scope: !18) |
| !33 = !DILocation(line: 6, column: 1, scope: !14) |
| !34 = distinct !DISubprogram(name: "d", scope: !3, file: !3, line: 7, type: !35, isLocal: false, isDefinition: true, scopeLine: 7, isOptimized: true, unit: !2, retainedNodes: !4) |
| !35 = !DISubroutineType(types: !36) |
| !36 = !{null} |
| !37 = !DILocation(line: 7, column: 11, scope: !34) |