| ; RUN: opt < %s -S -unroll-partial-threshold=20 -unroll-threshold=20 -passes=loop-unroll -unroll-allow-partial -unroll-runtime -unroll-allow-remainder -unroll-max-percent-threshold-boost=100 | FileCheck %s |
| ; RUN: opt < %s -S -passes='require<opt-remark-emit>,loop-unroll' -unroll-partial-threshold=20 -unroll-threshold=20 -unroll-allow-partial -unroll-runtime -unroll-allow-remainder -unroll-max-percent-threshold-boost=100 | FileCheck %s |
| ; |
| ; Also check that the simple unroller doesn't allow the partial unrolling. |
| ; RUN: opt < %s -S -passes='require<opt-remark-emit>,loop(loop-unroll-full)' -unroll-partial-threshold=20 -unroll-threshold=20 -unroll-allow-partial -unroll-runtime -unroll-allow-remainder -unroll-max-percent-threshold-boost=100 | FileCheck %s --check-prefix=CHECK-NO-UNROLL |
| |
| ; The Loop TripCount is 9. However unroll factors 3 or 9 exceed given threshold. |
| ; The test checks that we choose a smaller, power-of-two, unroll count and do not give up on unrolling. |
| |
| ; CHECK: for.body: |
| ; CHECK: store |
| ; CHECK: for.body.1: |
| ; CHECK: store |
| |
| ; CHECK-NO-UNROLL: for.body: |
| ; CHECK-NO-UNROLL: store |
| ; CHECK-NO-UNROLL-NOT: store |
| |
| define void @foo(ptr nocapture %a, ptr nocapture readonly %b) nounwind uwtable { |
| entry: |
| br label %for.body |
| |
| for.body: ; preds = %for.body, %entry |
| %indvars.iv = phi i64 [ 1, %entry ], [ %indvars.iv.next, %for.body ] |
| %arrayidx = getelementptr inbounds i32, ptr %b, i64 %indvars.iv |
| %ld = load i32, ptr %arrayidx, align 4 |
| %idxprom1 = sext i32 %ld to i64 |
| %arrayidx2 = getelementptr inbounds i32, ptr %a, i64 %idxprom1 |
| %st = trunc i64 %indvars.iv to i32 |
| store i32 %st, ptr %arrayidx2, align 4 |
| %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| %exitcond = icmp eq i64 %indvars.iv.next, 20 |
| br i1 %exitcond, label %for.end, label %for.body |
| |
| for.end: ; preds = %for.body |
| ret void |
| } |