1 ; RUN: opt < %s -loop-unroll -unroll-count=2 -S | FileCheck %s 2 3 ; LoopUnroll should unroll this loop into one big basic block. 4 5 ; CHECK: for.body: 6 ; CHECK: %i.013 = phi i64 [ 0, %entry ], [ %tmp16.1, %for.body ] 7 ; CHECK: br i1 %exitcond.1, label %for.end, label %for.body 8 9 define void @foo(double* nocapture %p, i64 %n) nounwind { 10 entry: 11 %mul10 = shl i64 %n, 1 ; <i64> [#uses=2] 12 br label %for.body 13 14 for.body: ; preds = %entry, %for.body 15 %i.013 = phi i64 [ %tmp16, %for.body ], [ 0, %entry ] ; <i64> [#uses=2] 16 %arrayidx7 = getelementptr double* %p, i64 %i.013 ; <double*> [#uses=2] 17 %tmp16 = add i64 %i.013, 1 ; <i64> [#uses=3] 18 %arrayidx = getelementptr double* %p, i64 %tmp16 ; <double*> [#uses=1] 19 %tmp4 = load double* %arrayidx ; <double> [#uses=1] 20 %tmp8 = load double* %arrayidx7 ; <double> [#uses=1] 21 %mul9 = fmul double %tmp8, %tmp4 ; <double> [#uses=1] 22 store double %mul9, double* %arrayidx7 23 %exitcond = icmp eq i64 %tmp16, %mul10 ; <i1> [#uses=1] 24 br i1 %exitcond, label %for.end, label %for.body 25 26 for.end: ; preds = %for.body, %entry 27 ret void 28 } 29
