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; REQUIRES: asserts
; RUN: opt < %s -passes='loop-vectorize' -force-vector-width=2 -enable-epilogue-vectorization -epilogue-vectorization-force-VF=2 --debug-only=loop-vectorize -S 2>&1 | FileCheck %s
target datalayout = "e-m:e-i64:64-n32:64-v256:256:256-v512:512:512"
; Currently we cannot handle live-out variables that are recurrences.
; CHECK: LV: Checking a loop in "f2"
; CHECK: LEV: Unable to vectorize epilogue because the loop is not a supported candidate.
define signext i32 @f2(i8* noalias %A, i32 signext %n) {
entry:
%cmp1 = icmp sgt i32 %n, 0
br i1 %cmp1, label %for.body.preheader, label %for.end
for.body.preheader: ; preds = %entry
%wide.trip.count = zext i32 %n to i64
br label %for.body
for.body: ; preds = %for.body.preheader, %for.body
%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds i8, i8* %A, i64 %indvars.iv
%0 = load i8, i8* %arrayidx, align 1
%add = add i8 %0, 1
%arrayidx3 = getelementptr inbounds i8, i8* %A, i64 %indvars.iv
store i8 %add, i8* %arrayidx3, align 1
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp ne i64 %indvars.iv.next, %wide.trip.count
br i1 %exitcond, label %for.body, label %for.end.loopexit
for.end.loopexit: ; preds = %for.body
%inc.lcssa.wide = phi i64 [ %indvars.iv.next, %for.body ]
%1 = trunc i64 %inc.lcssa.wide to i32
br label %for.end
for.end: ; preds = %for.end.loopexit, %entry
%i.0.lcssa = phi i32 [ 0, %entry ], [ %1, %for.end.loopexit ]
ret i32 %i.0.lcssa
}
; Currently we cannot handle widended/truncated inductions.
; CHECK: LV: Checking a loop in "f3"
; CHECK: LEV: Unable to vectorize epilogue because the loop is not a supported candidate.
define void @f3(i8* noalias %A, i32 signext %n) {
entry:
%cmp1 = icmp sgt i32 %n, 0
br i1 %cmp1, label %for.body.preheader, label %for.end
for.body.preheader: ; preds = %entry
%wide.trip.count = zext i32 %n to i64
br label %for.body
for.body: ; preds = %for.body.preheader, %for.body
%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
%0 = trunc i64 %indvars.iv to i32
%conv = trunc i32 %0 to i8
%arrayidx = getelementptr inbounds i8, i8* %A, i64 %indvars.iv
store i8 %conv, i8* %arrayidx, align 1
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp ne i64 %indvars.iv.next, %wide.trip.count
br i1 %exitcond, label %for.body, label %for.end.loopexit
for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %entry
ret void
}
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