1 ; RUN: opt -irce -S < %s 2>&1 | FileCheck %s 2 ; RUN: opt -passes='require<branch-prob>,loop(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 9 define void @inner_loop(i32* %arr, i32* %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, !irce.loop.clone !7 13 14 entry: 15 %len = load i32, i32* %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 19 loop: ; 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 25 in.bounds: ; preds = %loop 26 %addr = getelementptr i32, i32* %arr, i32 %idx 27 store i32 0, i32* %addr 28 %next = icmp slt i32 %idx.next, %n 29 br i1 %next, label %loop, label %exit 30 31 out.of.bounds: ; preds = %loop 32 ret void 33 34 exit: ; preds = %in.bounds, %entry 35 ret void 36 } 37 38 ; add loop metadata for pre and post loops 39 define void @single_access_with_preloop(i32 *%arr, i32 *%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, !irce.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, !irce.loop.clone !7 45 entry: 46 %len = load i32, i32* %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, i32* %arr, i32 %array.idx 61 store i32 0, i32* %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 } 71 attributes #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
