1 ; RUN: opt < %s -S -loop-unroll -unroll-threshold=800 -unroll-peel-max-count=0 | FileCheck %s 2 3 ; We should not peel this loop even though we can, because the max count is set 4 ; to zero. 5 define i32 @invariant_backedge_neg_1(i32 %a, i32 %b) { 6 ; CHECK-LABEL: @invariant_backedge_neg_1 7 ; CHECK-NOT loop.peel{{.*}}: 8 ; CHECK: loop: 9 ; CHECK: %i = phi 10 ; CHECK: %sum = phi 11 ; CHECK: %plus = phi 12 entry: 13 br label %loop 14 15 loop: 16 %i = phi i32 [ 0, %entry ], [ %inc, %loop ] 17 %sum = phi i32 [ 0, %entry ], [ %incsum, %loop ] 18 %plus = phi i32 [ %a, %entry ], [ %b, %loop ] 19 20 %incsum = add i32 %sum, %plus 21 %inc = add i32 %i, 1 22 %cmp = icmp slt i32 %i, 1000 23 24 br i1 %cmp, label %loop, label %exit 25 26 exit: 27 ret i32 %sum 28 } 29
