; RUN: opt -disable-basic-aa -enable-new-pm=0 -print-memoryssa -disable-output %s 2>&1 | FileCheck %s ; Note that the test crashes the MemorySSA verification when doing loop-rotate, ; if debuginfo is modelled in MemorySSA, due to the fact that MemorySSA is not ; updated when adding/removing debuginfo intrinsics. target triple = "x86_64-unknown-linux-gnu" ; CHECK-LABEL: @overflow_iter_var ; CHECK-NOT: MemoryDef define void @overflow_iter_var() !dbg !11 { entry: call void @llvm.dbg.value(metadata i16 0, metadata !16, metadata !DIExpression()), !dbg !18 br label %for.cond for.cond: ; preds = %for.body, %entry call void @llvm.dbg.value(metadata i16 0, metadata !16, metadata !DIExpression()), !dbg !18 call void @llvm.dbg.value(metadata i16 undef, metadata !20, metadata !DIExpression()), !dbg !21 br i1 undef, label %for.end, label %for.body for.body: ; preds = %for.cond %0 = load i16, i16* undef, align 1 br label %for.cond for.end: ; preds = %for.cond ret void } ; Function Attrs: nounwind readnone speculatable willreturn declare void @llvm.dbg.value(metadata, metadata, metadata) #1 attributes #1 = { nounwind readnone speculatable willreturn } !llvm.dbg.cu = !{!0} !llvm.module.flags = !{!10} !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !3, nameTableKind: None) !1 = !DIFile(filename: "2_loops.c", directory: "/") !2 = !{} !3 = !{} !6 = !DICompositeType(tag: DW_TAG_array_type, baseType: !7, size: 4096, elements: !8) !7 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_signed) !8 = !{!9} !9 = !DISubrange(count: 256) !10 = !{i32 2, !"Debug Info Version", i32 3} !11 = distinct !DISubprogram(name: "overflow_iter_var", scope: !1, file: !1, line: 20, type: !12, scopeLine: 21, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2) !12 = !DISubroutineType(types: !13) !13 = !{null, !14, !14} !14 = !DIBasicType(name: "unsigned int", size: 16, encoding: DW_ATE_unsigned) !16 = !DILocalVariable(name: "i", scope: !17, file: !1, line: 23, type: !14) !17 = distinct !DILexicalBlock(scope: !11, file: !1, line: 23, column: 3) !18 = !DILocation(line: 0, scope: !17) !20 = !DILocalVariable(name: "stop1", arg: 1, scope: !11, file: !1, line: 20, type: !14) !21 = !DILocation(line: 0, scope: !11)