1; REQUIRES: asserts 2; RUN: opt < %s -passes='loop-vectorize' -force-vector-width=2 -enable-epilogue-vectorization -epilogue-vectorization-force-VF=2 --debug-only=loop-vectorize --disable-output -S 2>&1 | FileCheck %s 3 4target datalayout = "e-m:e-i64:64-n32:64-v256:256:256-v512:512:512" 5 6; Currently we cannot handle live-out variables that are recurrences. 7; CHECK: LV: Checking a loop in 'f2' 8; CHECK: LEV: Unable to vectorize epilogue because the loop is not a supported candidate. 9 10define signext i32 @f2(ptr noalias %A, i32 signext %n) { 11entry: 12 %cmp1 = icmp sgt i32 %n, 0 13 br i1 %cmp1, label %for.body.preheader, label %for.end 14 15for.body.preheader: ; preds = %entry 16 %wide.trip.count = zext i32 %n to i64 17 br label %for.body 18 19for.body: ; preds = %for.body.preheader, %for.body 20 %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ] 21 %arrayidx = getelementptr inbounds i8, ptr %A, i64 %indvars.iv 22 %0 = load i8, ptr %arrayidx, align 1 23 %add = add i8 %0, 1 24 %arrayidx3 = getelementptr inbounds i8, ptr %A, i64 %indvars.iv 25 store i8 %add, ptr %arrayidx3, align 1 26 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 27 %exitcond = icmp ne i64 %indvars.iv.next, %wide.trip.count 28 br i1 %exitcond, label %for.body, label %for.end.loopexit 29 30for.end.loopexit: ; preds = %for.body 31 %inc.lcssa.wide = phi i64 [ %indvars.iv.next, %for.body ] 32 %1 = trunc i64 %inc.lcssa.wide to i32 33 br label %for.end 34 35for.end: ; preds = %for.end.loopexit, %entry 36 %i.0.lcssa = phi i32 [ 0, %entry ], [ %1, %for.end.loopexit ] 37 ret i32 %i.0.lcssa 38} 39