| ; RUN: opt < %s -S -loop-unroll -mtriple aarch64 -mcpu=cortex-a57 -unroll-runtime-epilog=true | FileCheck %s -check-prefix=EPILOG |
| ; RUN: opt < %s -S -loop-unroll -mtriple aarch64 -mcpu=cortex-a57 -unroll-runtime-epilog=false | FileCheck %s -check-prefix=PROLOG |
| |
| ; Tests for unrolling loops with run-time trip counts |
| |
| ; EPILOG: %xtraiter = and i32 %n |
| ; EPILOG: for.body: |
| ; EPILOG: %lcmp.mod = icmp ne i32 %xtraiter, 0 |
| ; EPILOG: br i1 %lcmp.mod, label %for.body.epil.preheader, label %for.end.loopexit |
| ; EPILOG: for.body.epil: |
| |
| ; PROLOG: %xtraiter = and i32 %n |
| ; PROLOG: %lcmp.mod = icmp ne i32 %xtraiter, 0 |
| ; PROLOG: br i1 %lcmp.mod, label %for.body.prol.preheader, label %for.body.prol.loopexit |
| ; PROLOG: for.body.prol: |
| ; PROLOG: for.body: |
| |
| define i32 @test(i32* nocapture %a, i32 %n) nounwind uwtable readonly { |
| entry: |
| %cmp1 = icmp eq i32 %n, 0 |
| br i1 %cmp1, label %for.end, label %for.body |
| |
| for.body: ; preds = %for.body, %entry |
| %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ] |
| %sum.02 = phi i32 [ %add, %for.body ], [ 0, %entry ] |
| %arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv |
| %0 = load i32, i32* %arrayidx, align 4 |
| %add = add nsw i32 %0, %sum.02 |
| %indvars.iv.next = add i64 %indvars.iv, 1 |
| %lftr.wideiv = trunc i64 %indvars.iv.next to i32 |
| %exitcond = icmp eq i32 %lftr.wideiv, %n |
| br i1 %exitcond, label %for.end, label %for.body |
| |
| for.end: ; preds = %for.body, %entry |
| %sum.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ] |
| ret i32 %sum.0.lcssa |
| } |
| |
| |