1; RUN: opt < %s -S -passes=loop-unroll -unroll-runtime -unroll-threshold=40 -unroll-max-percent-threshold-boost=100 | FileCheck %s 2 3@known_constant = internal unnamed_addr constant [9 x i32] [i32 0, i32 -1, i32 0, i32 -1, i32 5, i32 -1, i32 0, i32 -1, i32 0], align 16 4 5; CHECK-LABEL: @bar_prof 6; CHECK: loop: 7; CHECK: %mul = mul 8; CHECK: %mul.1 = mul 9; CHECK: %mul.2 = mul 10; CHECK: %mul.3 = mul 11; CHECK: br i1 %niter.ncmp.7, label %loop.end.unr-lcssa.loopexit, label %loop, !prof [[PROF0:![0-9]+]] 12; CHECK: loop.epil: 13; CHECK: br i1 %epil.iter.cmp, label %loop.epil, label %loop.end.epilog-lcssa, !prof [[PROF1:![0-9]+]], !llvm.loop {{![0-9]+}} 14define i32 @bar_prof(ptr noalias nocapture readonly %src, i64 %c) !prof !1 { 15entry: 16 br label %loop 17 18loop: 19 %iv = phi i64 [ 0, %entry ], [ %inc, %loop ] 20 %r = phi i32 [ 0, %entry ], [ %add, %loop ] 21 %arrayidx = getelementptr inbounds i32, ptr %src, i64 %iv 22 %src_element = load i32, ptr %arrayidx, align 4 23 %array_const_idx = getelementptr inbounds [9 x i32], ptr @known_constant, i64 0, i64 %iv 24 %const_array_element = load i32, ptr %array_const_idx, align 4 25 %mul = mul nsw i32 %src_element, %const_array_element 26 %add = add nsw i32 %mul, %r 27 %inc = add nuw nsw i64 %iv, 1 28 %exitcond86.i = icmp eq i64 %inc, %c 29 br i1 %exitcond86.i, label %loop.end, label %loop, !prof !2 30 31loop.end: 32 %r.lcssa = phi i32 [ %r, %loop ] 33 ret i32 %r.lcssa 34} 35 36; CHECK-LABEL: @bar_prof_flat 37; CHECK-NOT: loop.epil 38define i32 @bar_prof_flat(ptr noalias nocapture readonly %src, i64 %c) !prof !1 { 39entry: 40 br label %loop 41 42loop: 43 %iv = phi i64 [ 0, %entry ], [ %inc, %loop ] 44 %r = phi i32 [ 0, %entry ], [ %add, %loop ] 45 %arrayidx = getelementptr inbounds i32, ptr %src, i64 %iv 46 %src_element = load i32, ptr %arrayidx, align 4 47 %array_const_idx = getelementptr inbounds [9 x i32], ptr @known_constant, i64 0, i64 %iv 48 %const_array_element = load i32, ptr %array_const_idx, align 4 49 %mul = mul nsw i32 %src_element, %const_array_element 50 %add = add nsw i32 %mul, %r 51 %inc = add nuw nsw i64 %iv, 1 52 %exitcond86.i = icmp eq i64 %inc, %c 53 br i1 %exitcond86.i, label %loop, label %loop.end, !prof !2 54 55loop.end: 56 %r.lcssa = phi i32 [ %r, %loop ] 57 ret i32 %r.lcssa 58} 59 60!1 = !{!"function_entry_count", i64 1} 61!2 = !{!"branch_weights", i32 1, i32 1000} 62 63; CHECK: [[PROF0]] = !{!"branch_weights", i32 1, i32 124} 64; CHECK: [[PROF1]] = !{!"branch_weights", i32 3, i32 1} 65