xref: /llvm-project-15.0.7/llvm/test/Transforms/LoopVectorize/no_array_bounds.ll (revision 872f7000)

; RUN: opt < %s -loop-vectorize -transform-warning -S 2>&1 | FileCheck %s

; Verify warning is generated when vectorization/ interleaving is explicitly specified and fails to occur.
; CHECK: warning: no_array_bounds.cpp:5:5: loop not vectorized: the optimizer was unable to perform the requested transformation; the transformation might be disabled or specified as part of an unsupported transformation ordering
; CHECK: warning: no_array_bounds.cpp:10:5: loop not interleaved: the optimizer was unable to perform the requested transformation; the transformation might be disabled or specified as part of an unsupported transformation ordering

;  #pragma clang loop vectorize(enable)
;  for (int i = 0; i < number; i++) {
;    A[B[i]]++;
;  }

;  #pragma clang loop vectorize(disable) interleave(enable)
;  for (int i = 0; i < number; i++) {
;    B[A[i]]++;
;  }

target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"

; Function Attrs: nounwind ssp uwtable
define void @_Z4testPiS_i(i32* nocapture %A, i32* nocapture %B, i32 %number) #0 !dbg !4 {
entry:
  %cmp25 = icmp sgt i32 %number, 0, !dbg !10
  br i1 %cmp25, label %for.body.preheader, label %for.end15, !dbg !10, !llvm.loop !12

for.body.preheader:                               ; preds = %entry
  br label %for.body, !dbg !14

for.cond5.preheader:                              ; preds = %for.body
  br i1 %cmp25, label %for.body7.preheader, label %for.end15, !dbg !16, !llvm.loop !18

for.body7.preheader:                              ; preds = %for.cond5.preheader
  br label %for.body7, !dbg !20

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv27 = phi i64 [ %indvars.iv.next28, %for.body ], [ 0, %for.body.preheader ]
  %arrayidx = getelementptr inbounds i32, i32* %B, i64 %indvars.iv27, !dbg !14
  %0 = load i32, i32* %arrayidx, align 4, !dbg !14, !tbaa !22
  %idxprom1 = sext i32 %0 to i64, !dbg !14
  %arrayidx2 = getelementptr inbounds i32, i32* %A, i64 %idxprom1, !dbg !14
  %1 = load i32, i32* %arrayidx2, align 4, !dbg !14, !tbaa !22
  %inc = add nsw i32 %1, 1, !dbg !14
  store i32 %inc, i32* %arrayidx2, align 4, !dbg !14, !tbaa !22
  %indvars.iv.next28 = add nuw nsw i64 %indvars.iv27, 1, !dbg !10
  %lftr.wideiv29 = trunc i64 %indvars.iv.next28 to i32, !dbg !10
  %exitcond30 = icmp eq i32 %lftr.wideiv29, %number, !dbg !10
  br i1 %exitcond30, label %for.cond5.preheader, label %for.body, !dbg !10, !llvm.loop !12

for.body7:                                        ; preds = %for.body7.preheader, %for.body7
  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body7 ], [ 0, %for.body7.preheader ]
  %arrayidx9 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv, !dbg !20
  %2 = load i32, i32* %arrayidx9, align 4, !dbg !20, !tbaa !22
  %idxprom10 = sext i32 %2 to i64, !dbg !20
  %arrayidx11 = getelementptr inbounds i32, i32* %B, i64 %idxprom10, !dbg !20
  %3 = load i32, i32* %arrayidx11, align 4, !dbg !20, !tbaa !22
  %inc12 = add nsw i32 %3, 1, !dbg !20
  store i32 %inc12, i32* %arrayidx11, align 4, !dbg !20, !tbaa !22
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !16
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !16
  %exitcond = icmp eq i32 %lftr.wideiv, %number, !dbg !16
  br i1 %exitcond, label %for.end15.loopexit, label %for.body7, !dbg !16, !llvm.loop !18

for.end15.loopexit:                               ; preds = %for.body7
  br label %for.end15

for.end15:                                        ; preds = %for.end15.loopexit, %entry, %for.cond5.preheader
  ret void, !dbg !26
}

attributes #0 = { nounwind }

!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!7, !8}
!llvm.ident = !{!9}

!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0", isOptimized: true, emissionKind: LineTablesOnly, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
!1 = !DIFile(filename: "no_array_bounds.cpp", directory: ".")
!2 = !{}
!4 = distinct !DISubprogram(name: "test", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 2, file: !1, scope: !5, type: !6, retainedNodes: !2)
!5 = !DIFile(filename: "no_array_bounds.cpp", directory: ".")
!6 = !DISubroutineType(types: !2)
!7 = !{i32 2, !"Dwarf Version", i32 2}
!8 = !{i32 2, !"Debug Info Version", i32 3}
!9 = !{!"clang version 3.5.0"}
!10 = !DILocation(line: 4, column: 8, scope: !11)
!11 = distinct !DILexicalBlock(line: 4, column: 3, file: !1, scope: !4)
!12 = !{!12, !13}
!13 = !{!"llvm.loop.vectorize.enable", i1 true}
!14 = !DILocation(line: 5, column: 5, scope: !15)
!15 = distinct !DILexicalBlock(line: 4, column: 36, file: !1, scope: !11)
!16 = !DILocation(line: 9, column: 8, scope: !17)
!17 = distinct !DILexicalBlock(line: 9, column: 3, file: !1, scope: !4)
!18 = !{!18, !13, !19}
!19 = !{!"llvm.loop.vectorize.width", i32 1}
!20 = !DILocation(line: 10, column: 5, scope: !21)
!21 = distinct !DILexicalBlock(line: 9, column: 36, file: !1, scope: !17)
!22 = !{!23, !23, i64 0}
!23 = !{!"int", !24, i64 0}
!24 = !{!"omnipotent char", !25, i64 0}
!25 = !{!"Simple C/C++ TBAA"}
!26 = !DILocation(line: 12, column: 1, scope: !4)