1; RUN: opt < %s -S -inline | FileCheck %s
2; RUN: opt < %s -S -strip-debug -inline | FileCheck %s
3
4; https://bugs.llvm.org/show_bug.cgi?id=43291
5; The purpose of this test is to check if there is use_empty in the inner loop when scanning
6; blocks of allocas, if the alloca is use_empty, skip it when allocas inlining.
7
8define void @foo(i16 %k) !dbg !6 {
9  call void @llvm.dbg.value(metadata i16 %k, metadata !14, metadata !DIExpression()), !dbg !15
10  %alloca_a = alloca i32
11  call void @llvm.dbg.value(metadata i16 %k, metadata !14, metadata !DIExpression()), !dbg !15
12  %alloca_b = alloca [3 x i32]
13  call void @llvm.dbg.value(metadata i16 %k, metadata !14, metadata !DIExpression()), !dbg !15
14  %alloca_c = alloca i32
15  call void @llvm.dbg.value(metadata i16 %k, metadata !14, metadata !DIExpression()), !dbg !15
16  %alloca_a..1 = bitcast i32* %alloca_a to i8**, !dbg !16
17  %alloca_c..1 = bitcast i32* %alloca_c to i8**, !dbg !16
18  %_tmp23 = icmp ne i16 %k, 0
19  br i1 %_tmp23, label %bb1, label %bb2
20
21bb1:                                              ; preds = %0
22  %_tmp28 = getelementptr [3 x i32], [3 x i32]* %alloca_b, i16 0, i64 0
23  store i32 0, i32* %_tmp28
24  br label %bb2
25
26bb2:                                              ; preds = %bb1, %0
27  ret void
28}
29
30define i16 @bar() !dbg !17 {
31  ; CHECK-LABEL: bar
32  ; CHECK: %alloca_a.i = alloca i32
33  ; CHECK-NOT: %alloca_b.i = alloca [3 x i32]
34  ; CHECK: %alloca_c.i = alloca i32
35  call void @foo(i16 0), !dbg !20
36  br label %bb1
37
38bb1:                                              ; preds = %0
39  ret i16 0
40}
41
42; Function Attrs: nounwind readnone speculatable willreturn
43declare void @llvm.dbg.value(metadata, metadata, metadata) #0
44
45attributes #0 = { nounwind readnone speculatable willreturn }
46
47!llvm.dbg.cu = !{!0}
48!llvm.module.flags = !{!3, !4}
49!llvm.ident = !{!5}
50
51!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "Foo", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2, globals: !2)
52!1 = !DIFile(filename: "foo2.c", directory: "/tmp")
53!2 = !{}
54!3 = !{i32 2, !"Dwarf Version", i32 4}
55!4 = !{i32 2, !"Debug Info Version", i32 3}
56!5 = !{!"Foo"}
57!6 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 17, type: !7, scopeLine: 17, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
58!7 = !DISubroutineType(types: !8)
59!8 = !{!9, !13}
60!9 = !DIDerivedType(tag: DW_TAG_typedef, name: "int64_t", file: !10, line: 76, baseType: !11)
61!10 = !DIFile(filename: "stdint.h", directory: "/tmp")
62!11 = !DIDerivedType(tag: DW_TAG_typedef, name: "__i64_t", file: !1, baseType: !12)
63!12 = !DIBasicType(name: "signed long long", size: 64, encoding: DW_ATE_signed)
64!13 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_signed)
65!14 = !DILocalVariable(name: "k", arg: 1, scope: !6, file: !1, line: 17, type: !13)
66!15 = !DILocation(line: 0, scope: !6)
67!16 = !DILocation(line: 19, column: 3, scope: !6)
68!17 = distinct !DISubprogram(name: "g", scope: !1, file: !1, line: 8, type: !18, scopeLine: 8, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
69!18 = !DISubroutineType(types: !19)
70!19 = !{!13}
71!20 = !DILocation(line: 8, column: 7, scope: !17)
72