| ; RUN: opt -passes=loop-unroll-and-jam -allow-unroll-and-jam -unroll-and-jam-count=2 -S < %s | FileCheck %s |
| ; |
| ; Check that the disable_nonforced loop property is honored by |
| ; loop unroll-and-jam. |
| ; |
| target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64" |
| |
| ; CHECK-LABEL: disable_nonforced |
| ; CHECK: load |
| ; CHECK-NOT: load |
| define void @disable_nonforced(i32 %I, i32 %J, ptr noalias nocapture %A, ptr noalias nocapture readonly %B) { |
| entry: |
| %cmp = icmp ne i32 %J, 0 |
| %cmp122 = icmp ne i32 %I, 0 |
| %or.cond = and i1 %cmp, %cmp122 |
| br i1 %or.cond, label %for.outer.preheader, label %for.end |
| |
| for.outer.preheader: |
| br label %for.outer |
| |
| for.outer: |
| %i.us = phi i32 [ %add8.us, %for.latch ], [ 0, %for.outer.preheader ] |
| br label %for.inner |
| |
| for.inner: |
| %j.us = phi i32 [ 0, %for.outer ], [ %inc.us, %for.inner ] |
| %sum1.us = phi i32 [ 0, %for.outer ], [ %add.us, %for.inner ] |
| %arrayidx.us = getelementptr inbounds i32, ptr %B, i32 %j.us |
| %0 = load i32, ptr %arrayidx.us, align 4 |
| %add.us = add i32 %0, %sum1.us |
| %inc.us = add nuw i32 %j.us, 1 |
| %exitcond = icmp eq i32 %inc.us, %J |
| br i1 %exitcond, label %for.latch, label %for.inner |
| |
| for.latch: |
| %add.us.lcssa = phi i32 [ %add.us, %for.inner ] |
| %arrayidx6.us = getelementptr inbounds i32, ptr %A, i32 %i.us |
| store i32 %add.us.lcssa, ptr %arrayidx6.us, align 4 |
| %add8.us = add nuw i32 %i.us, 1 |
| %exitcond25 = icmp eq i32 %add8.us, %I |
| br i1 %exitcond25, label %for.end.loopexit, label %for.outer, !llvm.loop !0 |
| |
| for.end.loopexit: |
| br label %for.end |
| |
| for.end: |
| ret void |
| } |
| |
| !0 = distinct !{!0, !{!"llvm.loop.disable_nonforced"}} |