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1; RUN: opt -passes=irce -S < %s 2>&1 | FileCheck %s2; RUN: opt -passes='require<branch-prob>,irce' -S < %s 2>&1 | FileCheck %s3 4; test that the pre and post loops have loop metadata which disables any further5; loop optimizations.6 7; generates a post loop, which should have metadata !llvm.loop !28; Function Attrs: alwaysinline9define void @inner_loop(ptr %arr, ptr %a_len_ptr, i32 %n) #0 {10; CHECK-LABEL: inner_loop(11; CHECK-LABEL: in.bounds.postloop12; CHECK: br i1 %next.postloop, label %loop.postloop, label %exit.loopexit.loopexit, !llvm.loop !2, !loop_constrainer.loop.clone !713 14entry:15 %len = load i32, ptr %a_len_ptr, !range !016 %first.itr.check = icmp sgt i32 %n, 017 br i1 %first.itr.check, label %loop, label %exit18 19loop: ; preds = %in.bounds, %entry20 %idx = phi i32 [ 0, %entry ], [ %idx.next, %in.bounds ]21 %idx.next = add i32 %idx, 122 %abc = icmp slt i32 %idx, %len23 br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !124 25in.bounds: ; preds = %loop26 %addr = getelementptr i32, ptr %arr, i32 %idx27 store i32 0, ptr %addr28 %next = icmp slt i32 %idx.next, %n29 br i1 %next, label %loop, label %exit30 31out.of.bounds: ; preds = %loop32 ret void33 34exit: ; preds = %in.bounds, %entry35 ret void36}37 38; add loop metadata for pre and post loops39define 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.preloop42; CHECK: br i1 [[COND:%[^ ]+]], label %loop.preloop, label %preloop.exit.selector, !llvm.loop !8, !loop_constrainer.loop.clone !743; CHECK-LABEL: in.bounds.postloop44; CHECK: br i1 %next.postloop, label %loop.postloop, label %exit.loopexit.loopexit, !llvm.loop !9, !loop_constrainer.loop.clone !745 entry:46 %len = load i32, ptr %a_len_ptr, !range !047 %first.itr.check = icmp sgt i32 %n, 048 br i1 %first.itr.check, label %loop, label %exit49 50 loop:51 %idx = phi i32 [ 0, %entry ] , [ %idx.next, %in.bounds ]52 %idx.next = add i32 %idx, 153 %array.idx = add i32 %idx, %offset54 %abc.high = icmp slt i32 %array.idx, %len55 %abc.low = icmp sge i32 %array.idx, 056 %abc = and i1 %abc.low, %abc.high57 br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !158 59 in.bounds:60 %addr = getelementptr i32, ptr %arr, i32 %array.idx61 store i32 0, ptr %addr62 %next = icmp slt i32 %idx.next, %n63 br i1 %next, label %loop, label %exit64 65 out.of.bounds:66 ret void67 68 exit:69 ret void70}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