1; RUN: opt -passes=irce -S < %s 2>&1 | FileCheck %s 2; RUN: opt -passes='require<branch-prob>,irce' -S < %s 2>&1 | FileCheck %s 3 4; test that the pre and post loops have loop metadata which disables any further 5; loop optimizations. 6 7; generates a post loop, which should have metadata !llvm.loop !2 8; Function Attrs: alwaysinline 9define void @inner_loop(ptr %arr, ptr %a_len_ptr, i32 %n) #0 { 10; CHECK-LABEL: inner_loop( 11; CHECK-LABEL: in.bounds.postloop 12; CHECK: br i1 %next.postloop, label %loop.postloop, label %exit.loopexit.loopexit, !llvm.loop !2, !loop_constrainer.loop.clone !7 13 14entry: 15 %len = load i32, ptr %a_len_ptr, !range !0 16 %first.itr.check = icmp sgt i32 %n, 0 17 br i1 %first.itr.check, label %loop, label %exit 18 19loop: ; preds = %in.bounds, %entry 20 %idx = phi i32 [ 0, %entry ], [ %idx.next, %in.bounds ] 21 %idx.next = add i32 %idx, 1 22 %abc = icmp slt i32 %idx, %len 23 br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !1 24 25in.bounds: ; preds = %loop 26 %addr = getelementptr i32, ptr %arr, i32 %idx 27 store i32 0, ptr %addr 28 %next = icmp slt i32 %idx.next, %n 29 br i1 %next, label %loop, label %exit 30 31out.of.bounds: ; preds = %loop 32 ret void 33 34exit: ; preds = %in.bounds, %entry 35 ret void 36} 37 38; add loop metadata for pre and post loops 39define void @single_access_with_preloop(ptr %arr, ptr %a_len_ptr, i32 %n, i32 %offset) { 40; CHECK-LABEL: @single_access_with_preloop( 41; CHECK-LABEL: in.bounds.preloop 42; CHECK: br i1 [[COND:%[^ ]+]], label %loop.preloop, label %preloop.exit.selector, !llvm.loop !8, !loop_constrainer.loop.clone !7 43; CHECK-LABEL: in.bounds.postloop 44; CHECK: br i1 %next.postloop, label %loop.postloop, label %exit.loopexit.loopexit, !llvm.loop !9, !loop_constrainer.loop.clone !7 45 entry: 46 %len = load i32, ptr %a_len_ptr, !range !0 47 %first.itr.check = icmp sgt i32 %n, 0 48 br i1 %first.itr.check, label %loop, label %exit 49 50 loop: 51 %idx = phi i32 [ 0, %entry ] , [ %idx.next, %in.bounds ] 52 %idx.next = add i32 %idx, 1 53 %array.idx = add i32 %idx, %offset 54 %abc.high = icmp slt i32 %array.idx, %len 55 %abc.low = icmp sge i32 %array.idx, 0 56 %abc = and i1 %abc.low, %abc.high 57 br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !1 58 59 in.bounds: 60 %addr = getelementptr i32, ptr %arr, i32 %array.idx 61 store i32 0, ptr %addr 62 %next = icmp slt i32 %idx.next, %n 63 br i1 %next, label %loop, label %exit 64 65 out.of.bounds: 66 ret void 67 68 exit: 69 ret void 70} 71attributes #0 = { alwaysinline } 72 73!0 = !{i32 0, i32 2147483647} 74!1 = !{!"branch_weights", i32 64, i32 4} 75!2 = distinct !{!2, !3, !4, !5, !6} 76!3 = !{!"llvm.loop.unroll.disable"} 77!4 = !{!"llvm.loop.vectorize.enable", i1 false} 78!5 = !{!"llvm.loop.licm_versioning.disable"} 79!6 = !{!"llvm.loop.distribute.enable", i1 false} 80!7 = !{} 81!8 = distinct !{!8, !3, !4, !5} 82!9 = distinct !{!9, !3, !4, !5} 83