text: ; RUN: opt < %s -S -loop-unroll -mtriple aarch64 -mcpu=falkor | FileCheck %s
  ; RUN: opt < %s -S -loop-unroll -mtriple aarch64 -mcpu=falkor -enable-falkor-hwpf-unroll-fix=0 | FileCheck %s --check-prefix=NOHWPF
  
  ; Check that loop unroller doesn't exhaust HW prefetcher resources.
  
  ; Partial unroll 2 times for this loop on falkor instead of 4.
  ; NOHWPF-LABEL: @unroll1(
  ; NOHWPF-LABEL: loop:
  ; NOHWPF-NEXT: phi
  ; NOHWPF-NEXT: getelementptr
  ; NOHWPF-NEXT: load
  ; NOHWPF-NEXT: getelementptr
  ; NOHWPF-NEXT: load
  ; NOHWPF-NEXT: add
  ; NOHWPF-NEXT: getelementptr
  ; NOHWPF-NEXT: load
  ; NOHWPF-NEXT: getelementptr
  ; NOHWPF-NEXT: load
  ; NOHWPF-NEXT: add
  ; NOHWPF-NEXT: getelementptr
  ; NOHWPF-NEXT: load
  ; NOHWPF-NEXT: getelementptr
  ; NOHWPF-NEXT: load
  ; NOHWPF-NEXT: add
  ; NOHWPF-NEXT: getelementptr
  ; NOHWPF-NEXT: load
  ; NOHWPF-NEXT: getelementptr
  ; NOHWPF-NEXT: load
  ; NOHWPF-NEXT: add
  ; NOHWPF-NEXT: icmp
  ; NOHWPF-NEXT: br
  ; NOHWPF-NEXT-LABEL: exit:
  ;
  ; CHECK-LABEL: @unroll1(
  ; CHECK-LABEL: loop:
  ; CHECK-NEXT: phi
  ; CHECK-NEXT: getelementptr
  ; CHECK-NEXT: load
  ; CHECK-NEXT: getelementptr
  ; CHECK-NEXT: load
  ; CHECK-NEXT: add
  ; CHECK-NEXT: getelementptr
  ; CHECK-NEXT: load
  ; CHECK-NEXT: getelementptr
  ; CHECK-NEXT: load
  ; CHECK-NEXT: add
  ; CHECK-NEXT: icmp
  ; CHECK-NEXT: br
  ; CHECK-NEXT-LABEL: exit:
  define void @unroll1(i32* %p, i32* %p2) {
  entry:
    br label %loop
  
  loop:
    %iv = phi i32 [ 0, %entry ], [ %inc, %loop ]
  
    %gep = getelementptr inbounds i32, i32* %p, i32 %iv
    %load = load volatile i32, i32* %gep
  
    %gep2 = getelementptr inbounds i32, i32* %p2, i32 %iv
    %load2 = load volatile i32, i32* %gep2
  
    %inc = add i32 %iv, 1
    %exitcnd = icmp uge i32 %inc, 1024
    br i1 %exitcnd, label %exit, label %loop
  
  exit:
    ret void
  }
  
  ; Partial unroll 4 times for this loop on falkor instead of 8.
  ; NOHWPF-LABEL: @unroll2(
  ; NOHWPF-LABEL: loop2:
  ; NOHWPF-NEXT: phi
  ; NOHWPF-NEXT: phi
  ; NOHWPF-NEXT: getelementptr
  ; NOHWPF-NEXT: load
  ; NOHWPF-NEXT: add
  ; NOHWPF-NEXT: add
  ; NOHWPF-NEXT: getelementptr
  ; NOHWPF-NEXT: load
  ; NOHWPF-NEXT: add
  ; NOHWPF-NEXT: add
  ; NOHWPF-NEXT: getelementptr
  ; NOHWPF-NEXT: load
  ; NOHWPF-NEXT: add
  ; NOHWPF-NEXT: add
  ; NOHWPF-NEXT: getelementptr
  ; NOHWPF-NEXT: load
  ; NOHWPF-NEXT: add
  ; NOHWPF-NEXT: add
  ; NOHWPF-NEXT: getelementptr
  ; NOHWPF-NEXT: load
  ; NOHWPF-NEXT: add
  ; NOHWPF-NEXT: add
  ; NOHWPF-NEXT: getelementptr
  ; NOHWPF-NEXT: load
  ; NOHWPF-NEXT: add
  ; NOHWPF-NEXT: add
  ; NOHWPF-NEXT: getelementptr
  ; NOHWPF-NEXT: load
  ; NOHWPF-NEXT: add
  ; NOHWPF-NEXT: add
  ; NOHWPF-NEXT: getelementptr
  ; NOHWPF-NEXT: load
  ; NOHWPF-NEXT: add
  ; NOHWPF-NEXT: add
  ; NOHWPF-NEXT: icmp
  ; NOHWPF-NEXT: br
  ; NOHWPF-NEXT-LABEL: exit2:
  ;
  ; CHECK-LABEL: @unroll2(
  ; CHECK-LABEL: loop2:
  ; CHECK-NEXT: phi
  ; CHECK-NEXT: phi
  ; CHECK-NEXT: getelementptr
  ; CHECK-NEXT: load
  ; CHECK-NEXT: add
  ; CHECK-NEXT: add
  ; CHECK-NEXT: getelementptr
  ; CHECK-NEXT: load
  ; CHECK-NEXT: add
  ; CHECK-NEXT: add
  ; CHECK-NEXT: getelementptr
  ; CHECK-NEXT: load
  ; CHECK-NEXT: add
  ; CHECK-NEXT: add
  ; CHECK-NEXT: getelementptr
  ; CHECK-NEXT: load
  ; CHECK-NEXT: add
  ; CHECK-NEXT: add
  ; CHECK-NEXT: icmp
  ; CHECK-NEXT: br
  ; CHECK-NEXT-LABEL: exit2:
  
  define void @unroll2(i32* %p) {
  entry:
    br label %loop1
  
  loop1:
    %iv1 = phi i32 [ 0, %entry ], [ %inc1, %loop1.latch ]
    %outer.sum = phi i32 [ 0, %entry ], [ %sum, %loop1.latch ]
    br label %loop2.header
  
  loop2.header:
    br label %loop2
  
  loop2:
    %iv2 = phi i32 [ 0, %loop2.header ], [ %inc2, %loop2 ]
    %sum = phi i32 [ %outer.sum, %loop2.header ], [ %sum.inc, %loop2 ]
    %gep = getelementptr inbounds i32, i32* %p, i32 %iv2
    %load = load i32, i32* %gep
    %sum.inc = add i32 %sum, %load
    %inc2 = add i32 %iv2, 1
    %exitcnd2 = icmp uge i32 %inc2, 1024
    br i1 %exitcnd2, label %exit2, label %loop2
  
  exit2:
    br label %loop1.latch
  
  loop1.latch:
    %inc1 = add i32 %iv1, 1
    %exitcnd1 = icmp uge i32 %inc1, 1024
    br i1 %exitcnd2, label %exit, label %loop1
  
  exit:
    ret void
  }
  
  