forked from OSchip/llvm-project
93 lines
5.0 KiB
LLVM
93 lines
5.0 KiB
LLVM
; RUN: opt -S -loop-reduce %s -o - | FileCheck %s
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; REQUIRES: x86-registered-target
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;; Ensure that we retain debuginfo for the induction variable and dependant
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;; variables when loop strength reduction is applied to the loop.
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;; This IR produced from:
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;;
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;; clang -S -emit-llvm -Xclang -disable-llvm-passes -g lsr-basic.cpp -o
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;; Then executing opt -O2 up to the the loopFullUnroll pass.
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;; void mul_pow_of_2_to_shift(unsigned size, unsigned *data) {
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;; unsigned i = 0;
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;; #pragma clang loop vectorize(disable)
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;; while (i < size) {
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;; unsigned comp = i * 8;
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;; data[i] = comp;
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;; i++; // DexLabel('mul_pow_of_2_induction_increment')
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;; }
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;; }
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; CHECK: call void @llvm.dbg.value(metadata i64 %lsr.iv, metadata ![[i:[0-9]+]], metadata !DIExpression(DW_OP_consts, 8, DW_OP_div, DW_OP_stack_value))
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; CHECK: call void @llvm.dbg.value(metadata i64 %lsr.iv, metadata ![[comp:[0-9]+]], metadata !DIExpression(DW_OP_consts, 8, DW_OP_div, DW_OP_consts, 8, DW_OP_mul, DW_OP_stack_value))
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; CHECK: call void @llvm.dbg.value(metadata i64 %lsr.iv, metadata ![[i]], metadata !DIExpression(DW_OP_consts, 8, DW_OP_div, DW_OP_consts, 1, DW_OP_plus, DW_OP_stack_value))
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; CHECK: ![[i]] = !DILocalVariable(name: "i"
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; CHECK: ![[comp]] = !DILocalVariable(name: "comp"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define dso_local void @_Z21mul_pow_of_2_to_shiftjPj(i32 %size, i32* nocapture %data) local_unnamed_addr !dbg !7 {
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entry:
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call void @llvm.dbg.value(metadata i32 %size, metadata !12, metadata !DIExpression()), !dbg !13
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call void @llvm.dbg.value(metadata i32* %data, metadata !14, metadata !DIExpression()), !dbg !13
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call void @llvm.dbg.value(metadata i32 0, metadata !15, metadata !DIExpression()), !dbg !13
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%cmp4.not = icmp eq i32 %size, 0, !dbg !13
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br i1 %cmp4.not, label %while.end, label %while.body.preheader, !dbg !13
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while.body.preheader: ; preds = %entry
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%wide.trip.count = zext i32 %size to i64, !dbg !13
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br label %while.body, !dbg !13
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while.body: ; preds = %while.body, %while.body.preheader
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%indvars.iv = phi i64 [ 0, %while.body.preheader ], [ %indvars.iv.next, %while.body ]
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call void @llvm.dbg.value(metadata i64 %indvars.iv, metadata !15, metadata !DIExpression()), !dbg !13
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%0 = trunc i64 %indvars.iv to i32, !dbg !16
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%mul = shl i32 %0, 3, !dbg !16
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call void @llvm.dbg.value(metadata i32 %mul, metadata !18, metadata !DIExpression()), !dbg !16
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%arrayidx = getelementptr inbounds i32, i32* %data, i64 %indvars.iv, !dbg !16
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store i32 %mul, i32* %arrayidx, align 4, !dbg !16
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !16
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call void @llvm.dbg.value(metadata i64 %indvars.iv.next, metadata !15, metadata !DIExpression()), !dbg !13
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%exitcond = icmp ne i64 %indvars.iv.next, %wide.trip.count, !dbg !13
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br i1 %exitcond, label %while.body, label %while.end.loopexit, !dbg !13, !llvm.loop !19
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while.end.loopexit: ; preds = %while.body
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br label %while.end, !dbg !13
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while.end: ; preds = %while.end.loopexit, %entry
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ret void, !dbg !13
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}
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; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata) #0
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attributes #0 = { nofree nosync nounwind readnone speculatable willreturn }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!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)
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!1 = !DIFile(filename: "lsr-basic.cpp", directory: "/tmp")
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!2 = !{}
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!3 = !{i32 7, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!"clang version 13.0.0"}
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!7 = distinct !DISubprogram(name: "mul_pow_of_2_to_shift", linkageName: "_Z21mul_pow_of_2_to_shiftjPj", scope: !1, file: !1, line: 18, type: !8, scopeLine: 18, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
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!8 = !DISubroutineType(types: !9)
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!9 = !{null, !10, !11}
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!10 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
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!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64)
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!12 = !DILocalVariable(name: "size", arg: 1, scope: !7, file: !1, line: 18, type: !10)
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!13 = !DILocation(line: 0, scope: !7)
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!14 = !DILocalVariable(name: "data", arg: 2, scope: !7, file: !1, line: 18, type: !11)
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!15 = !DILocalVariable(name: "i", scope: !7, file: !1, line: 19, type: !10)
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!16 = !DILocation(line: 22, column: 27, scope: !17)
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!17 = distinct !DILexicalBlock(scope: !7, file: !1, line: 21, column: 22)
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!18 = !DILocalVariable(name: "comp", scope: !17, file: !1, line: 22, type: !10)
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!19 = distinct !{!19, !20, !21, !22, !23}
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!20 = !DILocation(line: 21, column: 5, scope: !7)
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!21 = !DILocation(line: 25, column: 5, scope: !7)
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!22 = !{!"llvm.loop.mustprogress"}
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!23 = !{!"llvm.loop.vectorize.width", i32 1}
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