forked from OSchip/llvm-project
94 lines
4.4 KiB
LLVM
94 lines
4.4 KiB
LLVM
; RUN: opt < %s -loop-vectorize -force-vector-width=4 -S 2>&1 | FileCheck %s
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; RUN: opt < %s -loop-vectorize -force-vector-width=1 -S 2>&1 | FileCheck %s -check-prefix=NOANALYSIS
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; RUN: opt < %s -loop-vectorize -force-vector-width=4 -pass-remarks-missed='loop-vectorize' -S 2>&1 | FileCheck %s -check-prefix=MOREINFO
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; CHECK: remark: source.cpp:4:5: loop not vectorized: loop contains a switch statement
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; CHECK: warning: source.cpp:4:5: loop not vectorized: failed explicitly specified loop vectorization
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; NOANALYSIS-NOT: remark: {{.*}}
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; NOANALYSIS: warning: source.cpp:4:5: loop not interleaved: failed explicitly specified loop interleaving
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; MOREINFO: remark: source.cpp:4:5: loop not vectorized: loop contains a switch statement
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; MOREINFO: remark: source.cpp:4:5: loop not vectorized: use -Rpass-analysis=loop-vectorize for more info (Force=true, Vector Width=4)
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; MOREINFO: warning: source.cpp:4:5: loop not vectorized: failed explicitly specified loop vectorization
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; CHECK: _Z11test_switchPii
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; CHECK-NOT: x i32>
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; CHECK: ret
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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; Function Attrs: nounwind optsize ssp uwtable
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define void @_Z11test_switchPii(i32* nocapture %A, i32 %Length) #0 !dbg !4 {
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entry:
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%cmp18 = icmp sgt i32 %Length, 0, !dbg !10
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br i1 %cmp18, label %for.body.preheader, label %for.end, !dbg !10, !llvm.loop !12
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for.body.preheader: ; preds = %entry
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br label %for.body, !dbg !14
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for.body: ; preds = %for.body.preheader, %for.inc
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %for.body.preheader ]
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv, !dbg !14
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%0 = load i32, i32* %arrayidx, align 4, !dbg !14, !tbaa !16
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switch i32 %0, label %for.inc [
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i32 0, label %sw.bb
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i32 1, label %sw.bb3
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], !dbg !14
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sw.bb: ; preds = %for.body
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%1 = trunc i64 %indvars.iv to i32, !dbg !20
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%mul = shl nsw i32 %1, 1, !dbg !20
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br label %for.inc, !dbg !22
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sw.bb3: ; preds = %for.body
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%2 = trunc i64 %indvars.iv to i32, !dbg !23
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store i32 %2, i32* %arrayidx, align 4, !dbg !23, !tbaa !16
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br label %for.inc, !dbg !23
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for.inc: ; preds = %sw.bb3, %for.body, %sw.bb
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%storemerge = phi i32 [ %mul, %sw.bb ], [ 0, %for.body ], [ 0, %sw.bb3 ]
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store i32 %storemerge, i32* %arrayidx, align 4, !dbg !20, !tbaa !16
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !10
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !10
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%exitcond = icmp eq i32 %lftr.wideiv, %Length, !dbg !10
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br i1 %exitcond, label %for.end.loopexit, label %for.body, !dbg !10, !llvm.loop !12
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for.end.loopexit: ; preds = %for.inc
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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ret void, !dbg !24
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}
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attributes #0 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!7, !8}
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!llvm.ident = !{!9}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0", isOptimized: true, runtimeVersion: 6, emissionKind: LineTablesOnly, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
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!1 = !DIFile(filename: "source.cpp", directory: ".")
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!2 = !{}
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!4 = distinct !DISubprogram(name: "test_switch", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 1, file: !1, scope: !5, type: !6, variables: !2)
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!5 = !DIFile(filename: "source.cpp", directory: ".")
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!6 = !DISubroutineType(types: !2)
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!7 = !{i32 2, !"Dwarf Version", i32 2}
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!8 = !{i32 2, !"Debug Info Version", i32 3}
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!9 = !{!"clang version 3.5.0"}
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!10 = !DILocation(line: 3, column: 8, scope: !11)
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!11 = distinct !DILexicalBlock(line: 3, column: 3, file: !1, scope: !4)
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!12 = !{!12, !13, !13}
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!13 = !{!"llvm.loop.vectorize.enable", i1 true}
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!14 = !DILocation(line: 4, column: 5, scope: !15)
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!15 = distinct !DILexicalBlock(line: 3, column: 36, file: !1, scope: !11)
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!16 = !{!17, !17, i64 0}
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!17 = !{!"int", !18, i64 0}
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!18 = !{!"omnipotent char", !19, i64 0}
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!19 = !{!"Simple C/C++ TBAA"}
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!20 = !DILocation(line: 6, column: 7, scope: !21)
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!21 = distinct !DILexicalBlock(line: 4, column: 18, file: !1, scope: !15)
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!22 = !DILocation(line: 7, column: 5, scope: !21)
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!23 = !DILocation(line: 9, column: 7, scope: !21)
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!24 = !DILocation(line: 14, column: 1, scope: !4)
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