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|
; RUN: opt -S -passes=loop-vectorize -pass-remarks-analysis=loop-vectorize -pass-remarks-with-hotness < %s 2>&1 | FileCheck %s
; 1 void cold(char *A, char *B, char *C, char *D, char *E, int N) {
; 2 for(int i = 0; i < N; i++) {
; 3 A[i + 1] = A[i] + B[i];
; 4 C[i] = Dptr E[i];
; 5 }
; 6 }
; 7
; 8 void hot(char *A, char *B, char *C, char *D, char *E, int N) {
; 9 for(int i = 0; i < N; i++) {
; 10 A[i + 1] = A[i] + B[i];
; 11 C[i] = Dptr E[i];
; 12 }
; 13 }
; 14
; 15 void unknown(char *A, char *B, char *C, char *D, char *E, int N) {
; 16 for(int i = 0; i < N; i++) {
; 17 A[i + 1] = A[i] + B[i];
; 18 C[i] = Dptr E[i];
; 19 }
; 20 }
; CHECK: remark: /tmp/s.c:3:14: loop not vectorized: unsafe dependent memory operations in loop. Use #pragma clang loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
; CHECK-NEXT: Backward loop carried data dependence. Memory location is the same as accessed at /tmp/s.c:3:16 (hotness: 300)
; CHECK: remark: /tmp/s.c:10:14: loop not vectorized: unsafe dependent memory operations in loop. Use #pragma clang loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
; CHECK-NEXT: Backward loop carried data dependence. Memory location is the same as accessed at /tmp/s.c:10:16 (hotness: 5000)
; CHECK: remark: /tmp/s.c:17:14: loop not vectorized: unsafe dependent memory operations in loop. Use #pragma clang loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
; CHECK-NEXT: Backward loop carried data dependence. Memory location is the same as accessed at /tmp/s.c:17:16{{$}}
; ModuleID = '/tmp/s.c'
source_filename = "/tmp/s.c"
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
; Function Attrs: norecurse nounwind ssp uwtable
define void @cold(ptr nocapture %A, ptr nocapture readonly %B, ptr nocapture %C, ptr nocapture readonly %D, ptr nocapture readonly %E, i32 %N) local_unnamed_addr #0 !dbg !7 !prof !56 {
entry:
%cmp28 = icmp sgt i32 %N, 0, !dbg !9
br i1 %cmp28, label %ph, label %for.cond.cleanup, !dbg !10, !prof !58
ph:
br label %for.body
for.body:
%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %ph ]
%arrayidx = getelementptr inbounds i8, ptr %A, i64 %indvars.iv, !dbg !12
%0 = load i8, ptr %arrayidx, align 1, !dbg !12, !tbaa !13
%arrayidx2 = getelementptr inbounds i8, ptr %B, i64 %indvars.iv, !dbg !16
%1 = load i8, ptr %arrayidx2, align 1, !dbg !16, !tbaa !13
%add = add i8 %1, %0, !dbg !17
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !10
%arrayidx7 = getelementptr inbounds i8, ptr %A, i64 %indvars.iv.next, !dbg !18
store i8 %add, ptr %arrayidx7, align 1, !dbg !19, !tbaa !13
%arrayidx9 = getelementptr inbounds i8, ptr %D, i64 %indvars.iv, !dbg !20
%2 = load i8, ptr %arrayidx9, align 1, !dbg !20, !tbaa !13
%arrayidx12 = getelementptr inbounds i8, ptr %E, i64 %indvars.iv, !dbg !21
%3 = load i8, ptr %arrayidx12, align 1, !dbg !21, !tbaa !13
%mul = mul i8 %3, %2, !dbg !22
%arrayidx16 = getelementptr inbounds i8, ptr %C, i64 %indvars.iv, !dbg !23
store i8 %mul, ptr %arrayidx16, align 1, !dbg !24, !tbaa !13
%lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !10
%exitcond = icmp eq i32 %lftr.wideiv, %N, !dbg !10
br i1 %exitcond, label %for.cond.cleanup, label %for.body, !dbg !10, !llvm.loop !25, !prof !59
for.cond.cleanup:
ret void, !dbg !11
}
; Function Attrs: norecurse nounwind ssp uwtable
define void @hot(ptr nocapture %A, ptr nocapture readonly %B, ptr nocapture %C, ptr nocapture readonly %D, ptr nocapture readonly %E, i32 %N) local_unnamed_addr #0 !dbg !26 !prof !57 {
entry:
%cmp28 = icmp sgt i32 %N, 0, !dbg !27
br i1 %cmp28, label %ph, label %for.cond.cleanup, !dbg !28, !prof !58
ph:
br label %for.body
for.body:
%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %ph ]
%arrayidx = getelementptr inbounds i8, ptr %A, i64 %indvars.iv, !dbg !30
%0 = load i8, ptr %arrayidx, align 1, !dbg !30, !tbaa !13
%arrayidx2 = getelementptr inbounds i8, ptr %B, i64 %indvars.iv, !dbg !31
%1 = load i8, ptr %arrayidx2, align 1, !dbg !31, !tbaa !13
%add = add i8 %1, %0, !dbg !32
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !28
%arrayidx7 = getelementptr inbounds i8, ptr %A, i64 %indvars.iv.next, !dbg !33
store i8 %add, ptr %arrayidx7, align 1, !dbg !34, !tbaa !13
%arrayidx9 = getelementptr inbounds i8, ptr %D, i64 %indvars.iv, !dbg !35
%2 = load i8, ptr %arrayidx9, align 1, !dbg !35, !tbaa !13
%arrayidx12 = getelementptr inbounds i8, ptr %E, i64 %indvars.iv, !dbg !36
%3 = load i8, ptr %arrayidx12, align 1, !dbg !36, !tbaa !13
%mul = mul i8 %3, %2, !dbg !37
%arrayidx16 = getelementptr inbounds i8, ptr %C, i64 %indvars.iv, !dbg !38
store i8 %mul, ptr %arrayidx16, align 1, !dbg !39, !tbaa !13
%lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !28
%exitcond = icmp eq i32 %lftr.wideiv, %N, !dbg !28
br i1 %exitcond, label %for.cond.cleanup, label %for.body, !dbg !28, !llvm.loop !40, !prof !59
for.cond.cleanup:
ret void, !dbg !29
}
; Function Attrs: norecurse nounwind ssp uwtable
define void @unknown(ptr nocapture %A, ptr nocapture readonly %B, ptr nocapture %C, ptr nocapture readonly %D, ptr nocapture readonly %E, i32 %N) local_unnamed_addr #0 !dbg !41 {
entry:
%cmp28 = icmp sgt i32 %N, 0, !dbg !42
br i1 %cmp28, label %ph, label %for.cond.cleanup, !dbg !43
ph:
br label %for.body
for.body:
%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %ph ]
%arrayidx = getelementptr inbounds i8, ptr %A, i64 %indvars.iv, !dbg !45
%0 = load i8, ptr %arrayidx, align 1, !dbg !45, !tbaa !13
%arrayidx2 = getelementptr inbounds i8, ptr %B, i64 %indvars.iv, !dbg !46
%1 = load i8, ptr %arrayidx2, align 1, !dbg !46, !tbaa !13
%add = add i8 %1, %0, !dbg !47
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !43
%arrayidx7 = getelementptr inbounds i8, ptr %A, i64 %indvars.iv.next, !dbg !48
store i8 %add, ptr %arrayidx7, align 1, !dbg !49, !tbaa !13
%arrayidx9 = getelementptr inbounds i8, ptr %D, i64 %indvars.iv, !dbg !50
%2 = load i8, ptr %arrayidx9, align 1, !dbg !50, !tbaa !13
%arrayidx12 = getelementptr inbounds i8, ptr %E, i64 %indvars.iv, !dbg !51
%3 = load i8, ptr %arrayidx12, align 1, !dbg !51, !tbaa !13
%mul = mul i8 %3, %2, !dbg !52
%arrayidx16 = getelementptr inbounds i8, ptr %C, i64 %indvars.iv, !dbg !53
store i8 %mul, ptr %arrayidx16, align 1, !dbg !54, !tbaa !13
%lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !43
%exitcond = icmp eq i32 %lftr.wideiv, %N, !dbg !43
br i1 %exitcond, label %for.cond.cleanup, label %for.body, !dbg !43, !llvm.loop !55
for.cond.cleanup:
ret void, !dbg !44
}
attributes #0 = { norecurse nounwind ssp uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="core2" "target-features"="+cx16,+fxsr,+mmx,+sse,+sse2,+sse3,+ssse3,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!llvm.ident = !{!6}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0 (trunk 273572) (llvm/trunk 273585)", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2)
!1 = !DIFile(filename: "/tmp/s.c", directory: "/tmp")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 2}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"PIC Level", i32 2}
!6 = !{!"clang version 3.9.0 (trunk 273572) (llvm/trunk 273585)"}
!7 = distinct !DISubprogram(name: "cold", scope: !1, file: !1, line: 1, type: !8, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !2)
!8 = !DISubroutineType(types: !2)
!9 = !DILocation(line: 2, column: 20, scope: !7)
!10 = !DILocation(line: 2, column: 3, scope: !7)
!11 = !DILocation(line: 6, column: 1, scope: !7)
!12 = !DILocation(line: 3, column: 16, scope: !7)
!13 = !{!14, !14, i64 0}
!14 = !{!"omnipotent char", !15, i64 0}
!15 = !{!"Simple C/C++ TBAA"}
!16 = !DILocation(line: 3, column: 23, scope: !7)
!17 = !DILocation(line: 3, column: 21, scope: !7)
!18 = !DILocation(line: 3, column: 5, scope: !7)
!19 = !DILocation(line: 3, column: 14, scope: !7)
!20 = !DILocation(line: 4, column: 12, scope: !7)
!21 = !DILocation(line: 4, column: 19, scope: !7)
!22 = !DILocation(line: 4, column: 17, scope: !7)
!23 = !DILocation(line: 4, column: 5, scope: !7)
!24 = !DILocation(line: 4, column: 10, scope: !7)
!25 = distinct !{!25, !10}
!26 = distinct !DISubprogram(name: "hot", scope: !1, file: !1, line: 8, type: !8, isLocal: false, isDefinition: true, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !2)
!27 = !DILocation(line: 9, column: 20, scope: !26)
!28 = !DILocation(line: 9, column: 3, scope: !26)
!29 = !DILocation(line: 13, column: 1, scope: !26)
!30 = !DILocation(line: 10, column: 16, scope: !26)
!31 = !DILocation(line: 10, column: 23, scope: !26)
!32 = !DILocation(line: 10, column: 21, scope: !26)
!33 = !DILocation(line: 10, column: 5, scope: !26)
!34 = !DILocation(line: 10, column: 14, scope: !26)
!35 = !DILocation(line: 11, column: 12, scope: !26)
!36 = !DILocation(line: 11, column: 19, scope: !26)
!37 = !DILocation(line: 11, column: 17, scope: !26)
!38 = !DILocation(line: 11, column: 5, scope: !26)
!39 = !DILocation(line: 11, column: 10, scope: !26)
!40 = distinct !{!40, !28}
!41 = distinct !DISubprogram(name: "unknown", scope: !1, file: !1, line: 15, type: !8, isLocal: false, isDefinition: true, scopeLine: 15, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !2)
!42 = !DILocation(line: 16, column: 20, scope: !41)
!43 = !DILocation(line: 16, column: 3, scope: !41)
!44 = !DILocation(line: 20, column: 1, scope: !41)
!45 = !DILocation(line: 17, column: 16, scope: !41)
!46 = !DILocation(line: 17, column: 23, scope: !41)
!47 = !DILocation(line: 17, column: 21, scope: !41)
!48 = !DILocation(line: 17, column: 5, scope: !41)
!49 = !DILocation(line: 17, column: 14, scope: !41)
!50 = !DILocation(line: 18, column: 12, scope: !41)
!51 = !DILocation(line: 18, column: 19, scope: !41)
!52 = !DILocation(line: 18, column: 17, scope: !41)
!53 = !DILocation(line: 18, column: 5, scope: !41)
!54 = !DILocation(line: 18, column: 10, scope: !41)
!55 = distinct !{!55, !43}
!56 = !{!"function_entry_count", i64 3}
!57 = !{!"function_entry_count", i64 50}
!58 = !{!"branch_weights", i32 10000, i32 1}
!59 = !{!"branch_weights", i32 1, i32 99}
|
