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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_pow_of_2_to_shift_var_inc(unsigned size, unsigned *data, unsigned multiplicand) {11;; unsigned i = 0;12;; #pragma clang loop vectorize(disable)13;; while (i < size) {14;; unsigned comp = i * multiplicand;15;; data[i] = comp; 16;; i++;17;; }18;; }19; CHECK: #dbg_value(i64 %lsr.iv, ![[i:[0-9]+]], !DIExpression(),20; CHECK: #dbg_value(!DIArgList(i64 %lsr.iv, i32 %multiplicand), ![[comp:[0-9]+]], !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_mul, 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 28@__const.main.data = private unnamed_addr constant [16 x i32] [i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15], align 1629 30define dso_local void @_Z21mul_pow_of_2_to_shiftjPjj(i32 %size, ptr nocapture %data, i32 %multiplicand) local_unnamed_addr !dbg !7 {31entry:32 call void @llvm.dbg.value(metadata i32 %size, metadata !12, metadata !DIExpression()), !dbg !1333 call void @llvm.dbg.value(metadata ptr %data, metadata !14, metadata !DIExpression()), !dbg !1334 call void @llvm.dbg.value(metadata i32 %multiplicand, metadata !15, metadata !DIExpression()), !dbg !1335 call void @llvm.dbg.value(metadata i32 0, metadata !16, metadata !DIExpression()), !dbg !1336 br label %while.cond, !dbg !1337 38while.cond: ; preds = %while.body, %entry39 %i.0 = phi i32 [ 0, %entry ], [ %inc, %while.body ], !dbg !1340 call void @llvm.dbg.value(metadata i32 %i.0, metadata !16, metadata !DIExpression()), !dbg !1341 %cmp = icmp ult i32 %i.0, %size, !dbg !1342 br i1 %cmp, label %while.body, label %while.end, !dbg !1343 44while.body: ; preds = %while.cond45 %mul = mul i32 %i.0, %multiplicand, !dbg !1746 call void @llvm.dbg.value(metadata i32 %mul, metadata !19, metadata !DIExpression()), !dbg !1747 %idxprom = zext i32 %i.0 to i64, !dbg !1748 %arrayidx = getelementptr inbounds i32, ptr %data, i64 %idxprom, !dbg !1749 store i32 %mul, ptr %arrayidx, align 4, !dbg !1750 %inc = add nuw i32 %i.0, 1, !dbg !1751 call void @llvm.dbg.value(metadata i32 %inc, metadata !16, metadata !DIExpression()), !dbg !1352 br label %while.cond, !dbg !13, !llvm.loop !2053 54while.end: ; preds = %while.cond55 ret void, !dbg !1356}57 58declare 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 13.0.0", 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 13.0.0"}71!7 = distinct !DISubprogram(name: "mul_pow_of_2_to_shift", linkageName: "_Z21mul_pow_of_2_to_shiftjPjj", scope: !1, file: !1, line: 17, type: !8, scopeLine: 17, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)72!8 = !DISubroutineType(types: !9)73!9 = !{null, !10, !11, !10}74!10 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)75!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64)76!12 = !DILocalVariable(name: "size", arg: 1, scope: !7, file: !1, line: 17, type: !10)77!13 = !DILocation(line: 0, scope: !7)78!14 = !DILocalVariable(name: "data", arg: 2, scope: !7, file: !1, line: 17, type: !11)79!15 = !DILocalVariable(name: "multiplicand", arg: 3, scope: !7, file: !1, line: 17, type: !10)80!16 = !DILocalVariable(name: "i", scope: !7, file: !1, line: 18, type: !10)81!17 = !DILocation(line: 21, column: 27, scope: !18)82!18 = distinct !DILexicalBlock(scope: !7, file: !1, line: 20, column: 22)83!19 = !DILocalVariable(name: "comp", scope: !18, file: !1, line: 21, type: !10)84!20 = distinct !{!20, !21, !22, !23, !24}85!21 = !DILocation(line: 20, column: 5, scope: !7)86!22 = !DILocation(line: 24, column: 5, scope: !7)87!23 = !{!"llvm.loop.mustprogress"}88!24 = !{!"llvm.loop.vectorize.width", i32 1}89