1 ; RUN: opt < %s -S -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: loop.epil: 12 define i32 @bar_prof(i32* noalias nocapture readonly %src, i64 %c) !prof !1 { 13 entry: 14 br label %loop 15 16 loop: 17 %iv = phi i64 [ 0, %entry ], [ %inc, %loop ] 18 %r = phi i32 [ 0, %entry ], [ %add, %loop ] 19 %arrayidx = getelementptr inbounds i32, i32* %src, i64 %iv 20 %src_element = load i32, i32* %arrayidx, align 4 21 %array_const_idx = getelementptr inbounds [9 x i32], [9 x i32]* @known_constant, i64 0, i64 %iv 22 %const_array_element = load i32, i32* %array_const_idx, align 4 23 %mul = mul nsw i32 %src_element, %const_array_element 24 %add = add nsw i32 %mul, %r 25 %inc = add nuw nsw i64 %iv, 1 26 %exitcond86.i = icmp eq i64 %inc, %c 27 br i1 %exitcond86.i, label %loop.end, label %loop, !prof !2 28 29 loop.end: 30 %r.lcssa = phi i32 [ %r, %loop ] 31 ret i32 %r.lcssa 32 } 33 34 ; CHECK-LABEL: @bar_prof_flat 35 ; CHECK-NOT: loop.epil 36 define i32 @bar_prof_flat(i32* noalias nocapture readonly %src, i64 %c) !prof !1 { 37 entry: 38 br label %loop 39 40 loop: 41 %iv = phi i64 [ 0, %entry ], [ %inc, %loop ] 42 %r = phi i32 [ 0, %entry ], [ %add, %loop ] 43 %arrayidx = getelementptr inbounds i32, i32* %src, i64 %iv 44 %src_element = load i32, i32* %arrayidx, align 4 45 %array_const_idx = getelementptr inbounds [9 x i32], [9 x i32]* @known_constant, i64 0, i64 %iv 46 %const_array_element = load i32, i32* %array_const_idx, align 4 47 %mul = mul nsw i32 %src_element, %const_array_element 48 %add = add nsw i32 %mul, %r 49 %inc = add nuw nsw i64 %iv, 1 50 %exitcond86.i = icmp eq i64 %inc, %c 51 br i1 %exitcond86.i, label %loop, label %loop.end, !prof !2 52 53 loop.end: 54 %r.lcssa = phi i32 [ %r, %loop ] 55 ret i32 %r.lcssa 56 } 57 58 !1 = !{!"function_entry_count", i64 1} 59 !2 = !{!"branch_weights", i32 1, i32 1000} 60
