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1; RUN: opt -inline -S < %s | FileCheck %s
2; RUN: opt -passes='cgscc(inline)' -S < %s | FileCheck %s
3
4; Make sure the inliner doesn't crash when a metadata-bridged SSA operand is an
5; undominated use.
6;
7; If we ever add a verifier check to prevent the scenario in this file, it's
8; fine to delete this testcase.  However, we would need a bitcode upgrade since
9; such historical IR exists in practice.
10
11define i32 @foo(i32 %i) !dbg !4 {
12entry:
13  tail call void @llvm.dbg.value(metadata i32 %add, metadata !8, metadata !10), !dbg !11
14  %add = add nsw i32 1, %i, !dbg !12
15  ret i32 %add, !dbg !13
16}
17
18; CHECK-LABEL: define i32 @caller(
19define i32 @caller(i32 %i) {
20; CHECK-NEXT: entry:
21entry:
22; Although the inliner shouldn't crash, it can't be expected to get the
23; "correct" SSA value since its assumptions have been violated.
24; CHECK-NEXT:   tail call void @llvm.dbg.value(metadata ![[EMPTY:[0-9]+]],
25; CHECK-NEXT:   %{{.*}} = add nsw
26  %call = tail call i32 @foo(i32 %i)
27  ret i32 %call
28}
29
30declare void @llvm.dbg.value(metadata, metadata, metadata)
31
32!llvm.dbg.cu = !{!0}
33!llvm.module.flags = !{!9}
34
35!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0 (trunk 265634) (llvm/trunk 265637)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
36!1 = !DIFile(filename: "t.c", directory: "/path/to/tests")
37
38; CHECK: ![[EMPTY]] = !{}
39!2 = !{}
40!4 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 2, type: !5, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !0)
41!5 = !DISubroutineType(types: !6)
42!6 = !{!7, !7}
43!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
44!8 = !DILocalVariable(name: "add", arg: 1, scope: !4, file: !1, line: 2, type: !7)
45!9 = !{i32 2, !"Debug Info Version", i32 3}
46!10 = !DIExpression()
47!11 = !DILocation(line: 2, column: 13, scope: !4)
48!12 = !DILocation(line: 2, column: 27, scope: !4)
49!13 = !DILocation(line: 2, column: 18, scope: !4)
50