| Dehao Chen | c3f87f0 | 2017-01-17 23:39:33 +0000 | [diff] [blame] | 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 |
| Andrew Trick | d04d1529 | 2011-12-09 06:19:40 +0000 | [diff] [blame] | 3 | |
| Chandler Carruth | ce40fa1 | 2017-01-25 02:49:01 +0000 | [diff] [blame] | 4 | ; RUN: opt < %s -S -passes='require<opt-remark-emit>,loop(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>,loop(unroll)' -unroll-threshold=25 -unroll-partial-threshold=25 -unroll-runtime -unroll-runtime-epilog=false | FileCheck %s -check-prefix=PROLOG |
| 6 | |
| Andrew Trick | d04d1529 | 2011-12-09 06:19:40 +0000 | [diff] [blame] | 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 |
| 9 | |
| David L Kreitzer | 188de5a | 2016-04-05 12:19:35 +0000 | [diff] [blame] | 10 | ; EPILOG: for.body: |
| 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: |
| 14 | |
| 15 | ; PROLOG: for.body.prol: |
| 16 | ; PROLOG: for.body: |
| 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 |
| Andrew Trick | d04d1529 | 2011-12-09 06:19:40 +0000 | [diff] [blame] | 19 | |
| 20 | define i32 @test(i32* nocapture %a, i32 %n) nounwind uwtable readonly { |
| 21 | entry: |
| 22 | %cmp1 = icmp eq i32 %n, 0 |
| 23 | br i1 %cmp1, label %for.end, label %for.body |
| 24 | |
| 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 ] |
| David Blaikie | 79e6c74 | 2015-02-27 19:29:02 +0000 | [diff] [blame] | 28 | %arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv |
| David Blaikie | a79ac14 | 2015-02-27 21:17:42 +0000 | [diff] [blame] | 29 | %0 = load i32, i32* %arrayidx, align 4 |
| Andrew Trick | d04d1529 | 2011-12-09 06:19:40 +0000 | [diff] [blame] | 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 |
| 35 | |
| 36 | for.end: ; preds = %for.body, %entry |
| 37 | %sum.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ] |
| 38 | ret i32 %sum.0.lcssa |
| 39 | } |