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