| ;RUN: opt < %s -passes=loop-reroll -S | FileCheck %s |
| ;void foo(ptr restrict a, ptr restrict b, int n) { |
| ; for(int i = 0; i < n; i+=4) { |
| ; a[i] = b[i]; |
| ; a[i+1] = b[i+1]; |
| ; a[i+2] = b[i+2]; |
| ; a[i+3] = b[i+3]; |
| ; } |
| ;} |
| target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64" |
| target triple = "armv4t--linux-gnueabi" |
| |
| ; Function Attrs: nounwind |
| define void @foo(ptr noalias nocapture %a, ptr noalias nocapture readonly %b, i32 %n) #0 !dbg !4 { |
| entry: |
| ;CHECK-LABEL: @foo |
| |
| tail call void @llvm.dbg.value(metadata ptr %a, metadata !12, metadata !22), !dbg !23 |
| tail call void @llvm.dbg.value(metadata ptr %b, metadata !13, metadata !22), !dbg !24 |
| tail call void @llvm.dbg.value(metadata i32 %n, metadata !14, metadata !22), !dbg !25 |
| tail call void @llvm.dbg.value(metadata i32 0, metadata !15, metadata !22), !dbg !26 |
| %cmp.30 = icmp sgt i32 %n, 0, !dbg !27 |
| br i1 %cmp.30, label %for.body.preheader, label %for.cond.cleanup, !dbg !29 |
| |
| for.body.preheader: ; preds = %entry |
| br label %for.body, !dbg !30 |
| |
| for.cond.cleanup.loopexit: ; preds = %for.body |
| br label %for.cond.cleanup, !dbg !32 |
| |
| for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry |
| ret void, !dbg !32 |
| |
| for.body: ; preds = %for.body.preheader, %for.body |
| ;CHECK: for.body: |
| ;CHECK: %indvar = phi i32 [ %indvar.next, %for.body ], [ 0, {{.*}} ] |
| ;CHECK: load |
| ;CHECK: store |
| ;CHECK-NOT: load |
| ;CHECK-NOT: store |
| ;CHECK: call void @llvm.dbg.value |
| ;CHECK: %indvar.next = add i32 %indvar, 1 |
| ;CHECK: icmp eq i32 %indvar |
| %i.031 = phi i32 [ %add13, %for.body ], [ 0, %for.body.preheader ] |
| %arrayidx = getelementptr inbounds float, ptr %b, i32 %i.031, !dbg !30 |
| %0 = load i32, ptr %arrayidx, align 4, !dbg !30, !tbaa !33 |
| %arrayidx1 = getelementptr inbounds float, ptr %a, i32 %i.031, !dbg !37 |
| store i32 %0, ptr %arrayidx1, align 4, !dbg !38, !tbaa !33 |
| %add = or i32 %i.031, 1, !dbg !39 |
| %arrayidx2 = getelementptr inbounds float, ptr %b, i32 %add, !dbg !40 |
| %1 = load i32, ptr %arrayidx2, align 4, !dbg !40, !tbaa !33 |
| %arrayidx4 = getelementptr inbounds float, ptr %a, i32 %add, !dbg !41 |
| store i32 %1, ptr %arrayidx4, align 4, !dbg !42, !tbaa !33 |
| %add5 = or i32 %i.031, 2, !dbg !43 |
| %arrayidx6 = getelementptr inbounds float, ptr %b, i32 %add5, !dbg !44 |
| %2 = load i32, ptr %arrayidx6, align 4, !dbg !44, !tbaa !33 |
| %arrayidx8 = getelementptr inbounds float, ptr %a, i32 %add5, !dbg !45 |
| store i32 %2, ptr %arrayidx8, align 4, !dbg !46, !tbaa !33 |
| %add9 = or i32 %i.031, 3, !dbg !47 |
| %arrayidx10 = getelementptr inbounds float, ptr %b, i32 %add9, !dbg !48 |
| %3 = load i32, ptr %arrayidx10, align 4, !dbg !48, !tbaa !33 |
| %arrayidx12 = getelementptr inbounds float, ptr %a, i32 %add9, !dbg !49 |
| store i32 %3, ptr %arrayidx12, align 4, !dbg !50, !tbaa !33 |
| %add13 = add nuw nsw i32 %i.031, 4, !dbg !51 |
| tail call void @llvm.dbg.value(metadata i32 %add13, metadata !15, metadata !22), !dbg !26 |
| %cmp = icmp slt i32 %add13, %n, !dbg !27 |
| br i1 %cmp, label %for.body, label %for.cond.cleanup.loopexit, !dbg !29 |
| } |
| |
| ; Function Attrs: nounwind readnone |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #1 |
| |
| attributes #0 = { nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "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" } |
| attributes #1 = { nounwind readnone } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!17, !18, !19, !20} |
| !llvm.ident = !{!21} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.8.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) |
| !1 = !DIFile(filename: "test.c", directory: "/home/weimingz/llvm-build/release/community-tip") |
| !2 = !{} |
| !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, retainedNodes: !11) |
| !5 = !DISubroutineType(types: !6) |
| !6 = !{null, !7, !7, !10} |
| !7 = !DIDerivedType(tag: DW_TAG_restrict_type, baseType: !8) |
| !8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 32, align: 32) |
| !9 = !DIBasicType(name: "float", size: 32, align: 32, encoding: DW_ATE_float) |
| !10 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) |
| !11 = !{!12, !13, !14, !15} |
| !12 = !DILocalVariable(name: "a", arg: 1, scope: !4, file: !1, line: 1, type: !7) |
| !13 = !DILocalVariable(name: "b", arg: 2, scope: !4, file: !1, line: 1, type: !7) |
| !14 = !DILocalVariable(name: "n", arg: 3, scope: !4, file: !1, line: 1, type: !10) |
| !15 = !DILocalVariable(name: "i", scope: !16, file: !1, line: 2, type: !10) |
| !16 = distinct !DILexicalBlock(scope: !4, file: !1, line: 2, column: 3) |
| !17 = !{i32 2, !"Dwarf Version", i32 4} |
| !18 = !{i32 2, !"Debug Info Version", i32 3} |
| !19 = !{i32 1, !"wchar_size", i32 4} |
| !20 = !{i32 1, !"min_enum_size", i32 4} |
| !21 = !{!"clang version 3.8.0"} |
| !22 = !DIExpression() |
| !23 = !DILocation(line: 1, column: 27, scope: !4) |
| !24 = !DILocation(line: 1, column: 47, scope: !4) |
| !25 = !DILocation(line: 1, column: 54, scope: !4) |
| !26 = !DILocation(line: 2, column: 11, scope: !16) |
| !27 = !DILocation(line: 2, column: 20, scope: !28) |
| !28 = distinct !DILexicalBlock(scope: !16, file: !1, line: 2, column: 3) |
| !29 = !DILocation(line: 2, column: 3, scope: !16) |
| !30 = !DILocation(line: 3, column: 12, scope: !31) |
| !31 = distinct !DILexicalBlock(scope: !28, file: !1, line: 2, column: 31) |
| !32 = !DILocation(line: 8, column: 1, scope: !4) |
| !33 = !{!34, !34, i64 0} |
| !34 = !{!"float", !35, i64 0} |
| !35 = !{!"omnipotent char", !36, i64 0} |
| !36 = !{!"Simple C/C++ TBAA"} |
| !37 = !DILocation(line: 3, column: 5, scope: !31) |
| !38 = !DILocation(line: 3, column: 10, scope: !31) |
| !39 = !DILocation(line: 4, column: 17, scope: !31) |
| !40 = !DILocation(line: 4, column: 14, scope: !31) |
| !41 = !DILocation(line: 4, column: 5, scope: !31) |
| !42 = !DILocation(line: 4, column: 12, scope: !31) |
| !43 = !DILocation(line: 5, column: 17, scope: !31) |
| !44 = !DILocation(line: 5, column: 14, scope: !31) |
| !45 = !DILocation(line: 5, column: 5, scope: !31) |
| !46 = !DILocation(line: 5, column: 12, scope: !31) |
| !47 = !DILocation(line: 6, column: 17, scope: !31) |
| !48 = !DILocation(line: 6, column: 14, scope: !31) |
| !49 = !DILocation(line: 6, column: 5, scope: !31) |
| !50 = !DILocation(line: 6, column: 12, scope: !31) |
| !51 = !DILocation(line: 2, column: 26, scope: !28) |