1; RUN: opt -S -loop-reduce %s | FileCheck %s 2; REQUIRES: x86-registered-target 3 4;; Ensure that SCEV-based salvaging in Loop Strength Reduction can salvage 5;; variadic dbg.value intrinsics. Generated from the following C++: 6 7;; clang -S -emit-llvm -Xclang -disable-llvm-passes -g lsr-variadic.cpp -o 8;; Then running 'opt -O2' up until LSR. 9;; void mul_to_addition(unsigned k, unsigned l, unsigned m, unsigned size, unsigned *data) { 10;; unsigned i = 0; 11;; #pragma clang loop vectorize(disable) 12;; while (i < size) { 13;; unsigned comp = (4 * i) + k; 14;; unsigned comp2 = comp * l; 15;; unsigned comp3 = comp2 << m; 16;; data[i] = comp; 17;; i++; 18;; } 19;; } 20;; This produces variadic dbg.value intrinsics with location op DIArglists 21;; of length two and three. 22;; A fourth dbg.value was added artificially by copying a generated dbg.value 23;; and the modifying the position of the optimised-out value in the location 24;; list. 25 26; CHECK: call void @llvm.dbg.value(metadata !DIArgList(i64 %lsr.iv, i32 %k), metadata ![[comp:[0-9]+]], metadata !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)) 27; CHECK: call void @llvm.dbg.value(metadata !DIArgList(i64 %lsr.iv, i32 %l, i32 %k), metadata ![[comp2:[0-9]+]], metadata !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)) 28; CHECK: call void @llvm.dbg.value(metadata !DIArgList(i64 %lsr.iv, i32 %m, i32 %l, i32 %k), metadata ![[comp3:[0-9]+]], metadata !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)) 29; CHECK: call void @llvm.dbg.value(metadata !DIArgList(i64 %lsr.iv, i32 %m, i32 %l, i32 %k), metadata ![[comp3:[0-9]+]], metadata !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: ![[comp]] = !DILocalVariable(name: "comp" 31; CHECK: ![[comp2]] = !DILocalVariable(name: "comp2" 32; CHECK: ![[comp3]] = !DILocalVariable(name: "comp3" 33 34 35target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 36target triple = "x86_64-unknown-linux-gnu" 37 38define dso_local void @_Z15mul_to_additionjjjjPj(i32 %k, i32 %l, i32 %m, i32 %size, i32* nocapture %data) local_unnamed_addr #0 !dbg !7 { 39entry: 40 call void @llvm.dbg.value(metadata i32 %k, metadata !14, metadata !DIExpression()), !dbg !24 41 call void @llvm.dbg.value(metadata i32 %l, metadata !15, metadata !DIExpression()), !dbg !24 42 call void @llvm.dbg.value(metadata i32 %m, metadata !16, metadata !DIExpression()), !dbg !24 43 call void @llvm.dbg.value(metadata i32 %size, metadata !17, metadata !DIExpression()), !dbg !24 44 call void @llvm.dbg.value(metadata i32* %data, metadata !18, metadata !DIExpression()), !dbg !24 45 call void @llvm.dbg.value(metadata i32 0, metadata !19, metadata !DIExpression()), !dbg !24 46 %cmp9.not = icmp eq i32 %size, 0, !dbg !25 47 br i1 %cmp9.not, label %while.end, label %while.body.preheader, !dbg !26 48 49while.body.preheader: ; preds = %entry 50 %wide.trip.count = zext i32 %size to i64, !dbg !25 51 br label %while.body, !dbg !26 52 53while.body: ; preds = %while.body, %while.body.preheader 54 %indvars.iv = phi i64 [ 0, %while.body.preheader ], [ %indvars.iv.next, %while.body ] 55 call void @llvm.dbg.value(metadata i64 %indvars.iv, metadata !19, metadata !DIExpression()), !dbg !24 56 %0 = trunc i64 %indvars.iv to i32, !dbg !27 57 %mul = shl i32 %0, 2, !dbg !27 58 %add = add i32 %mul, %k, !dbg !28 59 call void @llvm.dbg.value(metadata i32 %add, metadata !20, metadata !DIExpression()), !dbg !29 60 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 61 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 62 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 63 %arrayidx = getelementptr inbounds i32, i32* %data, i64 %indvars.iv, !dbg !30 64 store i32 %add, i32* %arrayidx, align 4, !dbg !31 65 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !32 66 call void @llvm.dbg.value(metadata i64 %indvars.iv.next, metadata !19, metadata !DIExpression()), !dbg !24 67 %exitcond = icmp ne i64 %indvars.iv.next, %wide.trip.count, !dbg !25 68 br i1 %exitcond, label %while.body, label %while.end.loopexit, !dbg !26, !llvm.loop !33 69 70while.end.loopexit: ; preds = %while.body 71 br label %while.end, !dbg !37 72 73while.end: ; preds = %while.end.loopexit, %entry 74 ret void, !dbg !37 75} 76 77; Function Attrs: nofree nosync nounwind readnone speculatable willreturn 78declare void @llvm.dbg.value(metadata, metadata, metadata) 79 80attributes #0 = { "target-cpu"="x86-64" } 81 82 83!llvm.dbg.cu = !{!0} 84!llvm.module.flags = !{!2, !3, !4, !5} 85!llvm.ident = !{!6} 86 87!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) 88!1 = !DIFile(filename: "variadic2.cpp", directory: "/test") 89!2 = !{i32 7, !"Dwarf Version", i32 4} 90!3 = !{i32 2, !"Debug Info Version", i32 3} 91!4 = !{i32 1, !"wchar_size", i32 4} 92!5 = !{i32 7, !"uwtable", i32 1} 93!6 = !{!"clang version 14.0.0"} 94!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) 95!8 = !DIFile(filename: "./variadic2.cpp", directory: "/test") 96!9 = !DISubroutineType(types: !10) 97!10 = !{null, !11, !11, !11, !11, !12} 98!11 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned) 99!12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64) 100!13 = !{!14, !15, !16, !17, !18, !19, !20, !22, !23} 101!14 = !DILocalVariable(name: "k", arg: 1, scope: !7, file: !8, line: 1, type: !11) 102!15 = !DILocalVariable(name: "l", arg: 2, scope: !7, file: !8, line: 1, type: !11) 103!16 = !DILocalVariable(name: "m", arg: 3, scope: !7, file: !8, line: 1, type: !11) 104!17 = !DILocalVariable(name: "size", arg: 4, scope: !7, file: !8, line: 1, type: !11) 105!18 = !DILocalVariable(name: "data", arg: 5, scope: !7, file: !8, line: 1, type: !12) 106!19 = !DILocalVariable(name: "i", scope: !7, file: !8, line: 2, type: !11) 107!20 = !DILocalVariable(name: "comp", scope: !21, file: !8, line: 5, type: !11) 108!21 = distinct !DILexicalBlock(scope: !7, file: !8, line: 4, column: 23) 109!22 = !DILocalVariable(name: "comp2", scope: !21, file: !8, line: 6, type: !11) 110!23 = !DILocalVariable(name: "comp3", scope: !21, file: !8, line: 7, type: !11) 111!24 = !DILocation(line: 0, scope: !7) 112!25 = !DILocation(line: 4, column: 15, scope: !7) 113!26 = !DILocation(line: 4, column: 6, scope: !7) 114!27 = !DILocation(line: 5, column: 29, scope: !21) 115!28 = !DILocation(line: 5, column: 34, scope: !21) 116!29 = !DILocation(line: 0, scope: !21) 117!30 = !DILocation(line: 8, column: 10, scope: !21) 118!31 = !DILocation(line: 8, column: 18, scope: !21) 119!32 = !DILocation(line: 9, column: 11, scope: !21) 120!33 = distinct !{!33, !26, !34, !35, !36} 121!34 = !DILocation(line: 10, column: 6, scope: !7) 122!35 = !{!"llvm.loop.mustprogress"} 123!36 = !{!"llvm.loop.vectorize.width", i32 1} 124!37 = !DILocation(line: 11, column: 2, scope: !7) 125