1 ; RUN: opt < %s -loop-reduce -S | FileCheck %s
3 ; Test that LSR preserves debug-info for induction variables.
5 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
7 define dso_local void @foo(i8* nocapture %p) local_unnamed_addr !dbg !7 {
10 call void @llvm.dbg.value(metadata i8* %p, metadata !13, metadata !DIExpression()), !dbg !16
11 call void @llvm.dbg.value(metadata i8 0, metadata !14, metadata !DIExpression()), !dbg !17
12 br label %for.body, !dbg !18
14 for.cond.cleanup: ; preds = %for.body
17 for.body: ; preds = %entry, %for.body
18 ; CHECK-LABEL: for.body:
19 %i.06 = phi i8 [ 0, %entry ], [ %inc, %for.body ]
20 %p.addr.05 = phi i8* [ %p, %entry ], [ %add.ptr, %for.body ]
21 call void @llvm.dbg.value(metadata i8 %i.06, metadata !14, metadata !DIExpression()), !dbg !17
22 call void @llvm.dbg.value(metadata i8* %p.addr.05, metadata !13, metadata !DIExpression()), !dbg !16
23 ; CHECK-NOT: call void @llvm.dbg.value(metadata i8* undef
24 ; CHECK: call void @llvm.dbg.value(metadata !DIArgList(i8* %lsr.iv, i8* %p), metadata ![[MID_p:[0-9]+]], metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_consts, 3, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_minus, DW_OP_consts, 3, DW_OP_div, DW_OP_consts, 3, DW_OP_mul, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_stack_value))
25 %add.ptr = getelementptr inbounds i8, i8* %p.addr.05, i64 3, !dbg !20
26 call void @llvm.dbg.value(metadata i8* %add.ptr, metadata !13, metadata !DIExpression()), !dbg !16
27 ; CHECK-NOT: call void @llvm.dbg.value(metadata i8* undef
28 ; CHECK: call void @llvm.dbg.value(metadata !DIArgList(i8* %lsr.iv, i8* %p), metadata ![[MID_p]], metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_consts, 3, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_minus, DW_OP_consts, 3, DW_OP_div, DW_OP_consts, 3, DW_OP_mul, DW_OP_consts, 3, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_plus, DW_OP_stack_value))
29 store i8 %i.06, i8* %add.ptr, align 1, !dbg !23, !tbaa !24
30 %inc = add nuw nsw i8 %i.06, 1, !dbg !27
31 call void @llvm.dbg.value(metadata i8 %inc, metadata !14, metadata !DIExpression()), !dbg !17
32 %exitcond.not = icmp eq i8 %inc, 32, !dbg !28
33 br i1 %exitcond.not, label %for.cond.cleanup, label %for.body, !dbg !18, !llvm.loop !29
36 declare void @llvm.dbg.value(metadata, metadata, metadata)
39 !llvm.module.flags = !{!3, !4, !5}
42 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 12.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
43 !1 = !DIFile(filename: "lsrdbg.c", directory: "/")
45 !3 = !{i32 7, !"Dwarf Version", i32 4}
46 !4 = !{i32 2, !"Debug Info Version", i32 3}
47 !5 = !{i32 1, !"wchar_size", i32 4}
48 !6 = !{!"clang version 12.0.0"}
49 !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !12)
50 !8 = !DISubroutineType(types: !9)
52 !10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64)
53 !11 = !DIBasicType(name: "unsigned char", size: 8, encoding: DW_ATE_unsigned_char)
55 !13 = !DILocalVariable(name: "p", arg: 1, scope: !7, file: !1, line: 2, type: !10)
56 ; CHECK: ![[MID_p]] = !DILocalVariable(name: "p", arg: 1, scope: !7, file: !1, line: 2, type: !10)
57 !14 = !DILocalVariable(name: "i", scope: !15, file: !1, line: 4, type: !11)
58 !15 = distinct !DILexicalBlock(scope: !7, file: !1, line: 4, column: 3)
59 !16 = !DILocation(line: 0, scope: !7)
60 !17 = !DILocation(line: 0, scope: !15)
61 !18 = !DILocation(line: 4, column: 3, scope: !15)
62 !19 = !DILocation(line: 8, column: 1, scope: !7)
63 !20 = !DILocation(line: 5, column: 7, scope: !21)
64 !21 = distinct !DILexicalBlock(scope: !22, file: !1, line: 4, column: 42)
65 !22 = distinct !DILexicalBlock(scope: !15, file: !1, line: 4, column: 3)
66 !23 = !DILocation(line: 6, column: 8, scope: !21)
67 !24 = !{!25, !25, i64 0}
68 !25 = !{!"omnipotent char", !26, i64 0}
69 !26 = !{!"Simple C/C++ TBAA"}
70 !27 = !DILocation(line: 4, column: 38, scope: !22)
71 !28 = !DILocation(line: 4, column: 31, scope: !22)
72 !29 = distinct !{!29, !18, !30, !31}
73 !30 = !DILocation(line: 7, column: 3, scope: !15)
74 !31 = !{!"llvm.loop.unroll.disable"}