1 ; RUN: opt < %s -S -loop-unroll -unroll-threshold=25 -unroll-runtime -unroll-count=8 | FileCheck %s -check-prefix=EPILOG 2 ; RUN: opt < %s -S -loop-unroll -unroll-threshold=25 -unroll-runtime -unroll-runtime-epilog=false | FileCheck %s -check-prefix=PROLOG 3 4 ; Choose a smaller, power-of-two, unroll count if the loop is too large. 5 ; This test makes sure we're not unrolling 'odd' counts 6 7 ; EPILOG: for.body: 8 ; EPILOG: br i1 %niter.ncmp.3, label %for.end.loopexit.unr-lcssa.loopexit{{.*}}, label %for.body 9 ; EPILOG-NOT: br i1 %niter.ncmp.4, label %for.end.loopexit.unr-lcssa.loopexit{{.*}}, label %for.body 10 ; EPILOG: for.body.epil: 11 12 ; PROLOG: for.body.prol: 13 ; PROLOG: for.body: 14 ; PROLOG: br i1 %exitcond.3, label %for.end.loopexit{{.*}}, label %for.body 15 ; PROLOG-NOT: br i1 %exitcond.4, label %for.end.loopexit{{.*}}, label %for.body 16 17 define i32 @test(i32* nocapture %a, i32 %n) nounwind uwtable readonly { 18 entry: 19 %cmp1 = icmp eq i32 %n, 0 20 br i1 %cmp1, label %for.end, label %for.body 21 22 for.body: ; preds = %for.body, %entry 23 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ] 24 %sum.02 = phi i32 [ %add, %for.body ], [ 0, %entry ] 25 %arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv 26 %0 = load i32, i32* %arrayidx, align 4 27 %add = add nsw i32 %0, %sum.02 28 %indvars.iv.next = add i64 %indvars.iv, 1 29 %lftr.wideiv = trunc i64 %indvars.iv.next to i32 30 %exitcond = icmp eq i32 %lftr.wideiv, %n 31 br i1 %exitcond, label %for.end, label %for.body 32 33 for.end: ; preds = %for.body, %entry 34 %sum.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ] 35 ret i32 %sum.0.lcssa 36 } 37
