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1; RUN: opt -S -loop-reduce %s -o - | FileCheck %s2; REQUIRES: x86-registered-target3 4;; Ensure that we retain debuginfo for the induction variable and dependant5;; variables when loop strength reduction is applied to the loop.6;; This IR produced from:7;;8;; clang -S -emit-llvm -Xclang -disable-llvm-passes -g lsr-basic.cpp -o9;; Then executing opt -O2 up to the the loopFullUnroll pass.10;; void mul_to_addition(unsigned k, unsigned size, unsigned *data) {11;; int i = 0;12;; #pragma clang loop vectorize(disable)13;; while (i < size) {14;; int comp = (4 * i) + k;15;; data[i] = comp;16;; i += 1;17;; }18;; }19; CHECK: #dbg_value(i64 %lsr.iv, ![[i:[0-9]+]], !DIExpression(),20; 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),21; CHECK: #dbg_value(i64 %lsr.iv, ![[i]], !DIExpression(DW_OP_consts, 1, DW_OP_plus, DW_OP_stack_value),22; CHECK: ![[i]] = !DILocalVariable(name: "i"23; CHECK: ![[comp]] = !DILocalVariable(name: "comp"24 25target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"26target triple = "x86_64-unknown-linux-gnu"27 28define dso_local void @_Z15mul_to_additionjjPj(i32 %k, i32 %size, ptr nocapture %data) local_unnamed_addr !dbg !7 {29entry:30 call void @llvm.dbg.value(metadata i32 %k, metadata !13, metadata !DIExpression()), !dbg !1431 call void @llvm.dbg.value(metadata i32 %size, metadata !15, metadata !DIExpression()), !dbg !1432 call void @llvm.dbg.value(metadata ptr %data, metadata !16, metadata !DIExpression()), !dbg !1433 call void @llvm.dbg.value(metadata i32 0, metadata !17, metadata !DIExpression()), !dbg !1434 br label %while.cond, !dbg !1435 36while.cond: ; preds = %while.body, %entry37 %i.0 = phi i32 [ 0, %entry ], [ %add1, %while.body ], !dbg !1438 call void @llvm.dbg.value(metadata i32 %i.0, metadata !17, metadata !DIExpression()), !dbg !1439 %cmp = icmp ult i32 %i.0, %size, !dbg !1440 br i1 %cmp, label %while.body, label %while.end, !dbg !1441 42while.body: ; preds = %while.cond43 %mul = mul nsw i32 %i.0, 4, !dbg !1944 %add = add i32 %mul, %k, !dbg !1945 call void @llvm.dbg.value(metadata i32 %add, metadata !21, metadata !DIExpression()), !dbg !1946 %idxprom = zext i32 %i.0 to i64, !dbg !1947 %arrayidx = getelementptr inbounds i32, ptr %data, i64 %idxprom, !dbg !1948 store i32 %add, ptr %arrayidx, align 4, !dbg !1949 %add1 = add nuw nsw i32 %i.0, 1, !dbg !1950 call void @llvm.dbg.value(metadata i32 %add1, metadata !17, metadata !DIExpression()), !dbg !1451 br label %while.cond, !dbg !14, !llvm.loop !2252 53while.end: ; preds = %while.cond54 ret void, !dbg !1455}56 57; Function Attrs: nofree nosync nounwind readnone speculatable willreturn58declare void @llvm.dbg.value(metadata, metadata, metadata)59 60!llvm.dbg.cu = !{!0}61!llvm.module.flags = !{!3, !4, !5}62!llvm.ident = !{!6}63 64!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)65!1 = !DIFile(filename: "basic.cpp", directory: "/test")66!2 = !{}67!3 = !{i32 7, !"Dwarf Version", i32 4}68!4 = !{i32 2, !"Debug Info Version", i32 3}69!5 = !{i32 1, !"wchar_size", i32 4}70!6 = !{!"clang version 12.0.0"}71!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)72!8 = !DIFile(filename: "./basic.cpp", directory: "/test")73!9 = !DISubroutineType(types: !10)74!10 = !{null, !11, !11, !12}75!11 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)76!12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64)77!13 = !DILocalVariable(name: "k", arg: 1, scope: !7, file: !8, line: 64, type: !11)78!14 = !DILocation(line: 0, scope: !7)79!15 = !DILocalVariable(name: "size", arg: 2, scope: !7, file: !8, line: 64, type: !11)80!16 = !DILocalVariable(name: "data", arg: 3, scope: !7, file: !8, line: 64, type: !12)81!17 = !DILocalVariable(name: "i", scope: !7, file: !8, line: 65, type: !18)82!18 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)83!19 = !DILocation(line: 68, column: 23, scope: !20)84!20 = distinct !DILexicalBlock(scope: !7, file: !8, line: 67, column: 22)85!21 = !DILocalVariable(name: "comp", scope: !20, file: !8, line: 68, type: !18)86!22 = distinct !{!22, !23, !24, !25, !26}87!23 = !DILocation(line: 67, column: 5, scope: !7)88!24 = !DILocation(line: 71, column: 5, scope: !7)89!25 = !{!"llvm.loop.mustprogress"}90!26 = !{!"llvm.loop.vectorize.width", i32 1}91