| ; 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(ptr 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, ptr %A, i64 %indvars.iv |
| %0 = load i8, ptr %arrayidx, align 1 |
| %add = add i8 %0, 1 |
| %arrayidx3 = getelementptr inbounds i8, ptr %A, i64 %indvars.iv |
| store i8 %add, ptr %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 |
| } |
