1 files changed, 54 insertions, 0 deletions
diff --git a/llvm/test/Analysis/MemorySSA/debugvalue2.ll b/llvm/test/Analysis/MemorySSA/debugvalue2.ll
new file mode 100644
index 00000000000..63144523f4f
--- /dev/null
+++ b/llvm/test/Analysis/MemorySSA/debugvalue2.ll
@@ -0,0 +1,54 @@
+; RUN: opt -disable-basicaa -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)