1 ; RUN: opt -S -loop-reduce %s | FileCheck %s
2 ; RUN: opt --try-experimental-debuginfo-iterators -S -loop-reduce %s | FileCheck %s
3 ; REQUIRES: x86-registered-target
5 ;; Ensure that SCEV-based salvaging in Loop Strength Reduction can salvage
6 ;; variadic dbg.value intrinsics. Generated from the following C++:
8 ;; clang -S -emit-llvm -Xclang -disable-llvm-passes -g lsr-variadic.cpp -o
9 ;; Then running 'opt -O2' up until LSR.
10 ;; void mul_to_addition(unsigned k, unsigned l, unsigned m, unsigned size, unsigned *data) {
12 ;; #pragma clang loop vectorize(disable)
14 ;; unsigned comp = (4 * i) + k;
15 ;; unsigned comp2 = comp * l;
16 ;; unsigned comp3 = comp2 << m;
21 ;; This produces variadic dbg.value intrinsics with location op DIArglists
22 ;; of length two and three.
23 ;; A fourth dbg.value was added artificially by copying a generated dbg.value
24 ;; and the modifying the position of the optimised-out value in the location
27 ; CHECK: #dbg_value(!DIArgList(i64 %lsr.iv, i32 %k), ![[comp:[0-9]+]], !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_consts, 4, DW_OP_div, DW_OP_consts, 4, DW_OP_mul, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_stack_value),
28 ; CHECK: #dbg_value(!DIArgList(i64 %lsr.iv, i32 %l, i32 %k), ![[comp2:[0-9]+]], !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_consts, 4, DW_OP_div, DW_OP_consts, 4, DW_OP_mul, DW_OP_LLVM_arg, 2, DW_OP_plus, DW_OP_LLVM_arg, 1, DW_OP_mul, DW_OP_stack_value),
29 ; CHECK: #dbg_value(!DIArgList(i64 %lsr.iv, i32 %m, i32 %l, i32 %k), ![[comp3:[0-9]+]], !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_consts, 4, DW_OP_div, DW_OP_consts, 4, DW_OP_mul, DW_OP_LLVM_arg, 3, DW_OP_plus, DW_OP_LLVM_arg, 2, DW_OP_mul, DW_OP_LLVM_arg, 1, DW_OP_shl, DW_OP_stack_value),
30 ; CHECK: #dbg_value(!DIArgList(i64 %lsr.iv, i32 %m, i32 %l, i32 %k), ![[comp3:[0-9]+]], !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_consts, 4, DW_OP_div, DW_OP_consts, 4, DW_OP_mul, DW_OP_LLVM_arg, 3, DW_OP_plus, DW_OP_LLVM_arg, 2, DW_OP_mul, DW_OP_LLVM_arg, 1, DW_OP_shl, DW_OP_stack_value),
31 ; CHECK: ![[comp]] = !DILocalVariable(name: "comp"
32 ; CHECK: ![[comp2]] = !DILocalVariable(name: "comp2"
33 ; CHECK: ![[comp3]] = !DILocalVariable(name: "comp3"
36 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
37 target triple = "x86_64-unknown-linux-gnu"
39 define dso_local void @_Z15mul_to_additionjjjjPj(i32 %k, i32 %l, i32 %m, i32 %size, ptr nocapture %data) local_unnamed_addr #0 !dbg !7 {
41 call void @llvm.dbg.value(metadata i32 %k, metadata !14, metadata !DIExpression()), !dbg !24
42 call void @llvm.dbg.value(metadata i32 %l, metadata !15, metadata !DIExpression()), !dbg !24
43 call void @llvm.dbg.value(metadata i32 %m, metadata !16, metadata !DIExpression()), !dbg !24
44 call void @llvm.dbg.value(metadata i32 %size, metadata !17, metadata !DIExpression()), !dbg !24
45 call void @llvm.dbg.value(metadata ptr %data, metadata !18, metadata !DIExpression()), !dbg !24
46 call void @llvm.dbg.value(metadata i32 0, metadata !19, metadata !DIExpression()), !dbg !24
47 %cmp9.not = icmp eq i32 %size, 0, !dbg !25
48 br i1 %cmp9.not, label %while.end, label %while.body.preheader, !dbg !26
50 while.body.preheader: ; preds = %entry
51 %wide.trip.count = zext i32 %size to i64, !dbg !25
52 br label %while.body, !dbg !26
54 while.body: ; preds = %while.body, %while.body.preheader
55 %indvars.iv = phi i64 [ 0, %while.body.preheader ], [ %indvars.iv.next, %while.body ]
56 call void @llvm.dbg.value(metadata i64 %indvars.iv, metadata !19, metadata !DIExpression()), !dbg !24
57 %0 = trunc i64 %indvars.iv to i32, !dbg !27
58 %mul = shl i32 %0, 2, !dbg !27
59 %add = add i32 %mul, %k, !dbg !28
60 call void @llvm.dbg.value(metadata i32 %add, metadata !20, metadata !DIExpression()), !dbg !29
61 call void @llvm.dbg.value(metadata !DIArgList(i32 %add, i32 %l), metadata !22, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_mul, DW_OP_stack_value)), !dbg !29
62 call void @llvm.dbg.value(metadata !DIArgList(i32 %add, i32 %m, i32 %l), metadata !23, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 2, DW_OP_mul, DW_OP_LLVM_arg, 1, DW_OP_shl, DW_OP_stack_value)), !dbg !29
63 call void @llvm.dbg.value(metadata !DIArgList(i32 %m, i32 %add, i32 %l), metadata !23, metadata !DIExpression(DW_OP_LLVM_arg, 1, DW_OP_LLVM_arg, 2, DW_OP_mul, DW_OP_LLVM_arg, 0, DW_OP_shl, DW_OP_stack_value)), !dbg !29
64 %arrayidx = getelementptr inbounds i32, ptr %data, i64 %indvars.iv, !dbg !30
65 store i32 %add, ptr %arrayidx, align 4, !dbg !31
66 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !32
67 call void @llvm.dbg.value(metadata i64 %indvars.iv.next, metadata !19, metadata !DIExpression()), !dbg !24
68 %exitcond = icmp ne i64 %indvars.iv.next, %wide.trip.count, !dbg !25
69 br i1 %exitcond, label %while.body, label %while.end.loopexit, !dbg !26, !llvm.loop !33
71 while.end.loopexit: ; preds = %while.body
72 br label %while.end, !dbg !37
74 while.end: ; preds = %while.end.loopexit, %entry
78 ; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
79 declare void @llvm.dbg.value(metadata, metadata, metadata)
81 attributes #0 = { "target-cpu"="x86-64" }
85 !llvm.module.flags = !{!2, !3, !4, !5}
88 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 14.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
89 !1 = !DIFile(filename: "variadic2.cpp", directory: "/test")
90 !2 = !{i32 7, !"Dwarf Version", i32 4}
91 !3 = !{i32 2, !"Debug Info Version", i32 3}
92 !4 = !{i32 1, !"wchar_size", i32 4}
93 !5 = !{i32 7, !"uwtable", i32 1}
94 !6 = !{!"clang version 14.0.0"}
95 !7 = distinct !DISubprogram(name: "mul_to_addition", linkageName: "_Z15mul_to_additionjjjjPj", scope: !8, file: !8, line: 1, type: !9, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !13)
96 !8 = !DIFile(filename: "./variadic2.cpp", directory: "/test")
97 !9 = !DISubroutineType(types: !10)
98 !10 = !{null, !11, !11, !11, !11, !12}
99 !11 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
100 !12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64)
101 !13 = !{!14, !15, !16, !17, !18, !19, !20, !22, !23}
102 !14 = !DILocalVariable(name: "k", arg: 1, scope: !7, file: !8, line: 1, type: !11)
103 !15 = !DILocalVariable(name: "l", arg: 2, scope: !7, file: !8, line: 1, type: !11)
104 !16 = !DILocalVariable(name: "m", arg: 3, scope: !7, file: !8, line: 1, type: !11)
105 !17 = !DILocalVariable(name: "size", arg: 4, scope: !7, file: !8, line: 1, type: !11)
106 !18 = !DILocalVariable(name: "data", arg: 5, scope: !7, file: !8, line: 1, type: !12)
107 !19 = !DILocalVariable(name: "i", scope: !7, file: !8, line: 2, type: !11)
108 !20 = !DILocalVariable(name: "comp", scope: !21, file: !8, line: 5, type: !11)
109 !21 = distinct !DILexicalBlock(scope: !7, file: !8, line: 4, column: 23)
110 !22 = !DILocalVariable(name: "comp2", scope: !21, file: !8, line: 6, type: !11)
111 !23 = !DILocalVariable(name: "comp3", scope: !21, file: !8, line: 7, type: !11)
112 !24 = !DILocation(line: 0, scope: !7)
113 !25 = !DILocation(line: 4, column: 15, scope: !7)
114 !26 = !DILocation(line: 4, column: 6, scope: !7)
115 !27 = !DILocation(line: 5, column: 29, scope: !21)
116 !28 = !DILocation(line: 5, column: 34, scope: !21)
117 !29 = !DILocation(line: 0, scope: !21)
118 !30 = !DILocation(line: 8, column: 10, scope: !21)
119 !31 = !DILocation(line: 8, column: 18, scope: !21)
120 !32 = !DILocation(line: 9, column: 11, scope: !21)
121 !33 = distinct !{!33, !26, !34, !35, !36}
122 !34 = !DILocation(line: 10, column: 6, scope: !7)
123 !35 = !{!"llvm.loop.mustprogress"}
124 !36 = !{!"llvm.loop.vectorize.width", i32 1}
125 !37 = !DILocation(line: 11, column: 2, scope: !7)