1 ; RUN: opt -S -loop-reduce %s -o - | FileCheck %s
2 ; RUN: opt --try-experimental-debuginfo-iterators -S -loop-reduce %s -o - | FileCheck %s
3 ; REQUIRES: x86-registered-target
5 ;; Ensure that we retain debuginfo for the induction variable and dependant
6 ;; variables when loop strength reduction is applied to the loop.
7 ;; This IR produced from:
9 ;; clang -S -emit-llvm -Xclang -disable-llvm-passes -g lsr-basic.cpp -o
10 ;; Then executing opt -O2 up to the the loopFullUnroll pass.
11 ;; void mul_to_addition(unsigned k, unsigned size, unsigned *data) {
13 ;; #pragma clang loop vectorize(disable)
15 ;; int comp = (4 * i) + k;
20 ; CHECK: #dbg_value(i64 %lsr.iv, ![[i:[0-9]+]], !DIExpression(),
21 ; CHECK: #dbg_value(!DIArgList(i64 %lsr.iv, i32 %k), ![[comp:[0-9]+]], !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_consts, 4, DW_OP_mul, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_stack_value),
22 ; CHECK: #dbg_value(i64 %lsr.iv, ![[i]], !DIExpression(DW_OP_consts, 1, DW_OP_plus, DW_OP_stack_value),
23 ; CHECK: ![[i]] = !DILocalVariable(name: "i"
24 ; CHECK: ![[comp]] = !DILocalVariable(name: "comp"
26 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
27 target triple = "x86_64-unknown-linux-gnu"
29 define dso_local void @_Z15mul_to_additionjjPj(i32 %k, i32 %size, ptr nocapture %data) local_unnamed_addr !dbg !7 {
31 call void @llvm.dbg.value(metadata i32 %k, metadata !13, metadata !DIExpression()), !dbg !14
32 call void @llvm.dbg.value(metadata i32 %size, metadata !15, metadata !DIExpression()), !dbg !14
33 call void @llvm.dbg.value(metadata ptr %data, metadata !16, metadata !DIExpression()), !dbg !14
34 call void @llvm.dbg.value(metadata i32 0, metadata !17, metadata !DIExpression()), !dbg !14
35 br label %while.cond, !dbg !14
37 while.cond: ; preds = %while.body, %entry
38 %i.0 = phi i32 [ 0, %entry ], [ %add1, %while.body ], !dbg !14
39 call void @llvm.dbg.value(metadata i32 %i.0, metadata !17, metadata !DIExpression()), !dbg !14
40 %cmp = icmp ult i32 %i.0, %size, !dbg !14
41 br i1 %cmp, label %while.body, label %while.end, !dbg !14
43 while.body: ; preds = %while.cond
44 %mul = mul nsw i32 %i.0, 4, !dbg !19
45 %add = add i32 %mul, %k, !dbg !19
46 call void @llvm.dbg.value(metadata i32 %add, metadata !21, metadata !DIExpression()), !dbg !19
47 %idxprom = zext i32 %i.0 to i64, !dbg !19
48 %arrayidx = getelementptr inbounds i32, ptr %data, i64 %idxprom, !dbg !19
49 store i32 %add, ptr %arrayidx, align 4, !dbg !19
50 %add1 = add nuw nsw i32 %i.0, 1, !dbg !19
51 call void @llvm.dbg.value(metadata i32 %add1, metadata !17, metadata !DIExpression()), !dbg !14
52 br label %while.cond, !dbg !14, !llvm.loop !22
54 while.end: ; preds = %while.cond
58 ; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
59 declare void @llvm.dbg.value(metadata, metadata, metadata)
62 !llvm.module.flags = !{!3, !4, !5}
65 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 12.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
66 !1 = !DIFile(filename: "basic.cpp", directory: "/test")
68 !3 = !{i32 7, !"Dwarf Version", i32 4}
69 !4 = !{i32 2, !"Debug Info Version", i32 3}
70 !5 = !{i32 1, !"wchar_size", i32 4}
71 !6 = !{!"clang version 12.0.0"}
72 !7 = distinct !DISubprogram(name: "mul_to_addition", linkageName: "_Z15mul_to_additionjjPj", scope: !8, file: !8, line: 64, type: !9, scopeLine: 64, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
73 !8 = !DIFile(filename: "./basic.cpp", directory: "/test")
74 !9 = !DISubroutineType(types: !10)
75 !10 = !{null, !11, !11, !12}
76 !11 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
77 !12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64)
78 !13 = !DILocalVariable(name: "k", arg: 1, scope: !7, file: !8, line: 64, type: !11)
79 !14 = !DILocation(line: 0, scope: !7)
80 !15 = !DILocalVariable(name: "size", arg: 2, scope: !7, file: !8, line: 64, type: !11)
81 !16 = !DILocalVariable(name: "data", arg: 3, scope: !7, file: !8, line: 64, type: !12)
82 !17 = !DILocalVariable(name: "i", scope: !7, file: !8, line: 65, type: !18)
83 !18 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
84 !19 = !DILocation(line: 68, column: 23, scope: !20)
85 !20 = distinct !DILexicalBlock(scope: !7, file: !8, line: 67, column: 22)
86 !21 = !DILocalVariable(name: "comp", scope: !20, file: !8, line: 68, type: !18)
87 !22 = distinct !{!22, !23, !24, !25, !26}
88 !23 = !DILocation(line: 67, column: 5, scope: !7)
89 !24 = !DILocation(line: 71, column: 5, scope: !7)
90 !25 = !{!"llvm.loop.mustprogress"}
91 !26 = !{!"llvm.loop.vectorize.width", i32 1}