1; RUN: opt -instcombine-lower-dbg-declare=0 < %s -instcombine -S | FileCheck %s
2; RUN: opt -instcombine-lower-dbg-declare=1 < %s -instcombine -S | FileCheck %s
3
4define i32 @foo(i32 %j) #0 !dbg !7 {
5entry:
6  %j.addr = alloca i32, align 4
7  store i32 %j, i32* %j.addr, align 4
8  call void @llvm.dbg.declare(metadata i32* %j.addr, metadata !11, metadata !12), !dbg !13
9  call void @llvm.dbg.value(metadata i32 10, metadata !16, metadata !12), !dbg !15
10  %0 = load i32, i32* %j.addr, align 4, !dbg !14
11  ret i32 %0, !dbg !15
12}
13
14; Instcombine can remove the alloca and forward the load to store, but it
15; should convert the declare to dbg value.
16; CHECK-LABEL: define i32 @foo(i32 %j)
17; CHECK-NOT: alloca
18; CHECK: call void @llvm.dbg.value(metadata i32 %j, {{.*}})
19; CHECK: call void @llvm.dbg.value(metadata i32 10, {{.*}})
20; CHECK: ret i32 %j
21
22declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
23declare void @llvm.dbg.value(metadata, metadata, metadata) #1
24
25!llvm.dbg.cu = !{!0}
26!llvm.module.flags = !{!3, !4, !5}
27!llvm.ident = !{!6}
28
29!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang 5.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
30!1 = !DIFile(filename: "a.c", directory: "/tmp")
31!2 = !{}
32!3 = !{i32 2, !"Dwarf Version", i32 4}
33!4 = !{i32 2, !"Debug Info Version", i32 3}
34!5 = !{i32 1, !"PIC Level", i32 2}
35!6 = !{!"clang version 5.0.0 (trunk 302918) (llvm/trunk 302925)"}
36!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 2, type: !8, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
37!8 = !DISubroutineType(types: !9)
38!9 = !{!10, !10}
39!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
40!11 = !DILocalVariable(name: "j", arg: 1, scope: !7, file: !1, line: 2, type: !10)
41!12 = !DIExpression()
42!13 = !DILocation(line: 2, column: 13, scope: !7)
43!14 = !DILocation(line: 5, column: 10, scope: !7)
44!15 = !DILocation(line: 5, column: 3, scope: !7)
45!16 = !DILocalVariable(name: "h", scope: !7, file: !1, line: 4, type: !10)
46