1 files changed, 75 insertions, 0 deletions
diff --git a/llvm/test/Transforms/LoopDeletion/diundef.ll b/llvm/test/Transforms/LoopDeletion/diundef.ll
new file mode 100644
index 00000000000..c9074dea7a6
--- /dev/null
+++ b/llvm/test/Transforms/LoopDeletion/diundef.ll
@@ -0,0 +1,75 @@
+; RUN: opt %s -loop-deletion -S | FileCheck %s
+
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.14.0"
+
+@a = common local_unnamed_addr global i32 0, align 4, !dbg !0
+
+define i32 @b() local_unnamed_addr !dbg !12 {
+entry:
+  call void @llvm.dbg.value(metadata i32 0, metadata !16, metadata !DIExpression()), !dbg !17
+  br label %for.cond, !dbg !18
+
+for.cond:                                         ; preds = %for.cond, %entry
+  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.cond ], !dbg !20
+  call void @llvm.dbg.value(metadata i32 %i.0, metadata !16, metadata !DIExpression()), !dbg !17
+  %inc = add nuw nsw i32 %i.0, 1, !dbg !21
+  call void @llvm.dbg.value(metadata i32 %inc, metadata !16, metadata !DIExpression()), !dbg !17
+  %exitcond = icmp ne i32 %inc, 3, !dbg !23
+  br i1 %exitcond, label %for.cond, label %for.end, !dbg !24, !llvm.loop !25
+
+; CHECK: call void @llvm.dbg.value(metadata void undef, metadata !16, metadata !DIExpression()), !dbg !17
+; CHECK-NEXT: %call = tail call i32 {{.*}} @patatino()
+for.end:                                          ; preds = %for.cond
+  %call = tail call i32 (...) @patatino() #3, !dbg !27
+  %0 = load i32, i32* @a, align 4, !dbg !28
+  ret i32 %0, !dbg !33
+}
+
+declare i32 @patatino(...) local_unnamed_addr
+
+define i32 @main() local_unnamed_addr !dbg !34 {
+entry:
+  %call = call i32 @b(), !dbg !35
+  ret i32 0, !dbg !36
+}
+
+declare void @llvm.dbg.value(metadata, metadata, metadata)
+
+!llvm.dbg.cu = !{!2}
+!llvm.module.flags = !{!7, !8, !9, !10}
+!llvm.ident = !{!11}
+
+!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
+!1 = distinct !DIGlobalVariable(name: "a", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)
+!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 8.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: GNU)
+!3 = !DIFile(filename: "a.c", directory: "/Users/davide/work/llvm-project-20170507/build-debug/bin")
+!4 = !{}
+!5 = !{!0}
+!6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!7 = !{i32 2, !"Dwarf Version", i32 4}
+!8 = !{i32 2, !"Debug Info Version", i32 3}
+!9 = !{i32 1, !"wchar_size", i32 4}
+!10 = !{i32 7, !"PIC Level", i32 2}
+!11 = !{!"clang version 8.0.0 "}
+!12 = distinct !DISubprogram(name: "b", scope: !3, file: !3, line: 2, type: !13, scopeLine: 2, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !15)
+!13 = !DISubroutineType(types: !14)
+!14 = !{!6}
+!15 = !{!16}
+!16 = !DILocalVariable(name: "i", scope: !12, file: !3, line: 3, type: !6)
+!17 = !DILocation(line: 3, column: 7, scope: !12)
+!18 = !DILocation(line: 4, column: 8, scope: !19)
+!19 = distinct !DILexicalBlock(scope: !12, file: !3, line: 4, column: 3)
+!20 = !DILocation(line: 0, scope: !19)
+!21 = !DILocation(line: 4, column: 23, scope: !22)
+!22 = distinct !DILexicalBlock(scope: !19, file: !3, line: 4, column: 3)
+!23 = !DILocation(line: 4, column: 17, scope: !22)
+!24 = !DILocation(line: 4, column: 3, scope: !19)
+!25 = distinct !{!25, !24, !26}
+!26 = !DILocation(line: 5, column: 5, scope: !19)
+!27 = !DILocation(line: 6, column: 3, scope: !12)
+!28 = !DILocation(line: 7, column: 10, scope: !12)
+!33 = !DILocation(line: 7, column: 3, scope: !12)
+!34 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 9, type: !13, scopeLine: 9, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !4)
+!35 = !DILocation(line: 9, column: 14, scope: !34)
+!36 = !DILocation(line: 9, column: 19, scope: !34)