1 ; RUN: opt < %s -loop-vectorize -S -pass-remarks-missed='loop-vectorize' -pass-remarks-analysis='loop-vectorize' 2>&1 | FileCheck %s 2 3 ; CHECK: remark: source.c:2:8: loop not vectorized: store that is conditionally executed prevents vectorization 4 5 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 6 target triple = "x86_64-apple-macosx10.9.0" 7 8 ; Function Attrs: nounwind ssp uwtable 9 define void @conditional_store(i32* noalias nocapture %indices) #0 { 10 entry: 11 br label %for.body, !dbg !10 12 13 for.body: ; preds = %for.inc, %entry 14 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.inc ] 15 %arrayidx = getelementptr inbounds i32, i32* %indices, i64 %indvars.iv, !dbg !12 16 %0 = load i32, i32* %arrayidx, align 4, !dbg !12, !tbaa !14 17 %cmp1 = icmp eq i32 %0, 1024, !dbg !12 18 br i1 %cmp1, label %if.then, label %for.inc, !dbg !12 19 20 if.then: ; preds = %for.body 21 store i32 0, i32* %arrayidx, align 4, !dbg !18, !tbaa !14 22 br label %for.inc, !dbg !18 23 24 for.inc: ; preds = %for.body, %if.then 25 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !10 26 %exitcond = icmp eq i64 %indvars.iv.next, 4096, !dbg !10 27 br i1 %exitcond, label %for.end, label %for.body, !dbg !10 28 29 for.end: ; preds = %for.inc 30 ret void, !dbg !19 31 } 32 33 attributes #0 = { nounwind } 34 35 !llvm.dbg.cu = !{!0} 36 !llvm.module.flags = !{!7, !8} 37 !llvm.ident = !{!9} 38 39 !0 = !MDCompileUnit(language: DW_LANG_C99, producer: "clang version 3.6.0", isOptimized: true, emissionKind: 2, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2) 40 !1 = !MDFile(filename: "source.c", directory: ".") 41 !2 = !{} 42 !3 = !{!4} 43 !4 = !MDSubprogram(name: "conditional_store", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 1, file: !1, scope: !5, type: !6, function: void (i32*)* @conditional_store, variables: !2) 44 !5 = !MDFile(filename: "source.c", directory: ".") 45 !6 = !MDSubroutineType(types: !2) 46 !7 = !{i32 2, !"Dwarf Version", i32 2} 47 !8 = !{i32 2, !"Debug Info Version", i32 3} 48 !9 = !{!"clang version 3.6.0"} 49 !10 = !MDLocation(line: 2, column: 8, scope: !11) 50 !11 = distinct !MDLexicalBlock(line: 2, column: 3, file: !1, scope: !4) 51 !12 = !MDLocation(line: 3, column: 9, scope: !13) 52 !13 = distinct !MDLexicalBlock(line: 3, column: 9, file: !1, scope: !11) 53 !14 = !{!15, !15, i64 0} 54 !15 = !{!"int", !16, i64 0} 55 !16 = !{!"omnipotent char", !17, i64 0} 56 !17 = !{!"Simple C/C++ TBAA"} 57 !18 = !MDLocation(line: 3, column: 29, scope: !13) 58 !19 = !MDLocation(line: 4, column: 1, scope: !4) 59
