1 ;RUN: opt < %s -loop-reroll -S | FileCheck %s 2 ;void foo(float * restrict a, float * restrict b, int n) { 3 ; for(int i = 0; i < n; i+=4) { 4 ; a[i] = b[i]; 5 ; a[i+1] = b[i+1]; 6 ; a[i+2] = b[i+2]; 7 ; a[i+3] = b[i+3]; 8 ; } 9 ;} 10 target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64" 11 target triple = "armv4t--linux-gnueabi" 12 13 ; Function Attrs: nounwind 14 define void @foo(float* noalias nocapture %a, float* noalias nocapture readonly %b, i32 %n) #0 !dbg !4 { 15 entry: 16 ;CHECK-LABEL: @foo 17 18 tail call void @llvm.dbg.value(metadata float* %a, i64 0, metadata !12, metadata !22), !dbg !23 19 tail call void @llvm.dbg.value(metadata float* %b, i64 0, metadata !13, metadata !22), !dbg !24 20 tail call void @llvm.dbg.value(metadata i32 %n, i64 0, metadata !14, metadata !22), !dbg !25 21 tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !15, metadata !22), !dbg !26 22 %cmp.30 = icmp sgt i32 %n, 0, !dbg !27 23 br i1 %cmp.30, label %for.body.preheader, label %for.cond.cleanup, !dbg !29 24 25 for.body.preheader: ; preds = %entry 26 br label %for.body, !dbg !30 27 28 for.cond.cleanup.loopexit: ; preds = %for.body 29 br label %for.cond.cleanup, !dbg !32 30 31 for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry 32 ret void, !dbg !32 33 34 for.body: ; preds = %for.body.preheader, %for.body 35 ;CHECK: for.body: 36 ;CHECK: %indvar = phi i32 [ %indvar.next, %for.body ], [ 0, {{.*}} ] 37 ;CHECK: load 38 ;CHECK: store 39 ;CHECK-NOT: load 40 ;CHECK-NOT: store 41 ;CHECK: call void @llvm.dbg.value 42 ;CHECK: %indvar.next = add i32 %indvar, 1 43 ;CHECK: icmp eq i32 %indvar 44 %i.031 = phi i32 [ %add13, %for.body ], [ 0, %for.body.preheader ] 45 %arrayidx = getelementptr inbounds float, float* %b, i32 %i.031, !dbg !30 46 %0 = bitcast float* %arrayidx to i32*, !dbg !30 47 %1 = load i32, i32* %0, align 4, !dbg !30, !tbaa !33 48 %arrayidx1 = getelementptr inbounds float, float* %a, i32 %i.031, !dbg !37 49 %2 = bitcast float* %arrayidx1 to i32*, !dbg !38 50 store i32 %1, i32* %2, align 4, !dbg !38, !tbaa !33 51 %add = or i32 %i.031, 1, !dbg !39 52 %arrayidx2 = getelementptr inbounds float, float* %b, i32 %add, !dbg !40 53 %3 = bitcast float* %arrayidx2 to i32*, !dbg !40 54 %4 = load i32, i32* %3, align 4, !dbg !40, !tbaa !33 55 %arrayidx4 = getelementptr inbounds float, float* %a, i32 %add, !dbg !41 56 %5 = bitcast float* %arrayidx4 to i32*, !dbg !42 57 store i32 %4, i32* %5, align 4, !dbg !42, !tbaa !33 58 %add5 = or i32 %i.031, 2, !dbg !43 59 %arrayidx6 = getelementptr inbounds float, float* %b, i32 %add5, !dbg !44 60 %6 = bitcast float* %arrayidx6 to i32*, !dbg !44 61 %7 = load i32, i32* %6, align 4, !dbg !44, !tbaa !33 62 %arrayidx8 = getelementptr inbounds float, float* %a, i32 %add5, !dbg !45 63 %8 = bitcast float* %arrayidx8 to i32*, !dbg !46 64 store i32 %7, i32* %8, align 4, !dbg !46, !tbaa !33 65 %add9 = or i32 %i.031, 3, !dbg !47 66 %arrayidx10 = getelementptr inbounds float, float* %b, i32 %add9, !dbg !48 67 %9 = bitcast float* %arrayidx10 to i32*, !dbg !48 68 %10 = load i32, i32* %9, align 4, !dbg !48, !tbaa !33 69 %arrayidx12 = getelementptr inbounds float, float* %a, i32 %add9, !dbg !49 70 %11 = bitcast float* %arrayidx12 to i32*, !dbg !50 71 store i32 %10, i32* %11, align 4, !dbg !50, !tbaa !33 72 %add13 = add nuw nsw i32 %i.031, 4, !dbg !51 73 tail call void @llvm.dbg.value(metadata i32 %add13, i64 0, metadata !15, metadata !22), !dbg !26 74 %cmp = icmp slt i32 %add13, %n, !dbg !27 75 br i1 %cmp, label %for.body, label %for.cond.cleanup.loopexit, !dbg !29 76 } 77 78 ; Function Attrs: nounwind readnone 79 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1 80 81 attributes #0 = { nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="arm7tdmi" "target-features"="+strict-align" "unsafe-fp-math"="false" "use-soft-float"="false" } 82 attributes #1 = { nounwind readnone } 83 84 !llvm.dbg.cu = !{!0} 85 !llvm.module.flags = !{!17, !18, !19, !20} 86 !llvm.ident = !{!21} 87 88 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.8.0 (http://llvm.org/git/clang.git b1fbc23058e7fa1cdd954ab97ba84f1c549c9879) (http://llvm.org/git/llvm.git 054da58c5398a721d4dab7af63d7de8d7a1e1a1c)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) 89 !1 = !DIFile(filename: "test.c", directory: "/home/weimingz/llvm-build/release/community-tip") 90 !2 = !{} 91 !4 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !5, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !11) 92 !5 = !DISubroutineType(types: !6) 93 !6 = !{null, !7, !7, !10} 94 !7 = !DIDerivedType(tag: DW_TAG_restrict_type, baseType: !8) 95 !8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 32, align: 32) 96 !9 = !DIBasicType(name: "float", size: 32, align: 32, encoding: DW_ATE_float) 97 !10 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 98 !11 = !{!12, !13, !14, !15} 99 !12 = !DILocalVariable(name: "a", arg: 1, scope: !4, file: !1, line: 1, type: !7) 100 !13 = !DILocalVariable(name: "b", arg: 2, scope: !4, file: !1, line: 1, type: !7) 101 !14 = !DILocalVariable(name: "n", arg: 3, scope: !4, file: !1, line: 1, type: !10) 102 !15 = !DILocalVariable(name: "i", scope: !16, file: !1, line: 2, type: !10) 103 !16 = distinct !DILexicalBlock(scope: !4, file: !1, line: 2, column: 3) 104 !17 = !{i32 2, !"Dwarf Version", i32 4} 105 !18 = !{i32 2, !"Debug Info Version", i32 3} 106 !19 = !{i32 1, !"wchar_size", i32 4} 107 !20 = !{i32 1, !"min_enum_size", i32 4} 108 !21 = !{!"clang version 3.8.0 (http://llvm.org/git/clang.git b1fbc23058e7fa1cdd954ab97ba84f1c549c9879) (http://llvm.org/git/llvm.git 054da58c5398a721d4dab7af63d7de8d7a1e1a1c)"} 109 !22 = !DIExpression() 110 !23 = !DILocation(line: 1, column: 27, scope: !4) 111 !24 = !DILocation(line: 1, column: 47, scope: !4) 112 !25 = !DILocation(line: 1, column: 54, scope: !4) 113 !26 = !DILocation(line: 2, column: 11, scope: !16) 114 !27 = !DILocation(line: 2, column: 20, scope: !28) 115 !28 = distinct !DILexicalBlock(scope: !16, file: !1, line: 2, column: 3) 116 !29 = !DILocation(line: 2, column: 3, scope: !16) 117 !30 = !DILocation(line: 3, column: 12, scope: !31) 118 !31 = distinct !DILexicalBlock(scope: !28, file: !1, line: 2, column: 31) 119 !32 = !DILocation(line: 8, column: 1, scope: !4) 120 !33 = !{!34, !34, i64 0} 121 !34 = !{!"float", !35, i64 0} 122 !35 = !{!"omnipotent char", !36, i64 0} 123 !36 = !{!"Simple C/C++ TBAA"} 124 !37 = !DILocation(line: 3, column: 5, scope: !31) 125 !38 = !DILocation(line: 3, column: 10, scope: !31) 126 !39 = !DILocation(line: 4, column: 17, scope: !31) 127 !40 = !DILocation(line: 4, column: 14, scope: !31) 128 !41 = !DILocation(line: 4, column: 5, scope: !31) 129 !42 = !DILocation(line: 4, column: 12, scope: !31) 130 !43 = !DILocation(line: 5, column: 17, scope: !31) 131 !44 = !DILocation(line: 5, column: 14, scope: !31) 132 !45 = !DILocation(line: 5, column: 5, scope: !31) 133 !46 = !DILocation(line: 5, column: 12, scope: !31) 134 !47 = !DILocation(line: 6, column: 17, scope: !31) 135 !48 = !DILocation(line: 6, column: 14, scope: !31) 136 !49 = !DILocation(line: 6, column: 5, scope: !31) 137 !50 = !DILocation(line: 6, column: 12, scope: !31) 138 !51 = !DILocation(line: 2, column: 26, scope: !28) 139
