| ; RUN: opt -loop-unroll -unroll-count=2 -S < %s | FileCheck %s |
| ; |
| ; Check that the disable_nonforced loop property is honored by |
| ; loop unroll. |
| ; |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| |
| ; CHECK-LABEL: @disable_nonforced( |
| ; CHECK: load |
| ; CHECK-NOT: load |
| define void @disable_nonforced(i32* nocapture %a) { |
| entry: |
| br label %for.body |
| |
| for.body: |
| %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] |
| %arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv |
| %0 = load i32, i32* %arrayidx, align 4 |
| %inc = add nsw i32 %0, 1 |
| store i32 %inc, i32* %arrayidx, align 4 |
| %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| %exitcond = icmp eq i64 %indvars.iv.next, 64 |
| br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !0 |
| |
| for.end: |
| ret void |
| } |
| |
| !0 = !{!0, !{!"llvm.loop.disable_nonforced"}} |
