1 ; RUN: opt < %s -S -debug-only=loop-unroll -loop-unroll 2>&1 | FileCheck %s 2 ; RUN: opt < %s -S -debug-only=loop-unroll -passes='require<profile-summary>,function(require<opt-remark-emit>,unroll)' 2>&1 | FileCheck %s 3 ; Confirm that peeling is disabled if the number of counts required to reach 4 ; the hot percentile is above the threshold. 5 ; RUN: opt < %s -S -profile-summary-huge-working-set-size-threshold=9 -debug-only=loop-unroll -passes='require<profile-summary>,function(require<opt-remark-emit>,unroll)' 2>&1 | FileCheck %s --check-prefix=NOPEEL 6 ; REQUIRES: asserts 7 8 ; Make sure we use the profile information correctly to peel-off 3 iterations 9 ; from the loop, and update the branch weights for the peeled loop properly. 10 11 ; CHECK: Loop Unroll: F[basic] 12 ; CHECK: PEELING loop %for.body with iteration count 3! 13 ; CHECK: Loop Unroll: F[optsize] 14 ; CHECK-NOT: PEELING 15 16 ; Confirm that no peeling occurs when we are performing full unrolling. 17 ; RUN: opt < %s -S -debug-only=loop-unroll -passes='require<opt-remark-emit>,loop(unroll-full)' 2>&1 | FileCheck %s --check-prefix=NOPEEL 18 ; NOPEEL-NOT: PEELING 19 20 ; CHECK-LABEL: @basic 21 ; CHECK: br i1 %{{.*}}, label %[[NEXT0:.*]], label %for.cond.for.end_crit_edge, !prof !15 22 ; CHECK: [[NEXT0]]: 23 ; CHECK: br i1 %{{.*}}, label %[[NEXT1:.*]], label %for.cond.for.end_crit_edge, !prof !16 24 ; CHECK: [[NEXT1]]: 25 ; CHECK: br i1 %{{.*}}, label %[[NEXT2:.*]], label %for.cond.for.end_crit_edge, !prof !17 26 ; CHECK: [[NEXT2]]: 27 ; CHECK: br i1 %{{.*}}, label %for.body, label %{{.*}}, !prof !18 28 29 define void @basic(i32* %p, i32 %k) #0 !prof !15 { 30 entry: 31 %cmp3 = icmp slt i32 0, %k 32 br i1 %cmp3, label %for.body.lr.ph, label %for.end 33 34 for.body.lr.ph: ; preds = %entry 35 br label %for.body 36 37 for.body: ; preds = %for.body.lr.ph, %for.body 38 %i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ] 39 %p.addr.04 = phi i32* [ %p, %for.body.lr.ph ], [ %incdec.ptr, %for.body ] 40 %incdec.ptr = getelementptr inbounds i32, i32* %p.addr.04, i32 1 41 store i32 %i.05, i32* %p.addr.04, align 4 42 %inc = add nsw i32 %i.05, 1 43 %cmp = icmp slt i32 %inc, %k 44 br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge, !prof !16 45 46 for.cond.for.end_crit_edge: ; preds = %for.body 47 br label %for.end 48 49 for.end: ; preds = %for.cond.for.end_crit_edge, %entry 50 ret void 51 } 52 53 ; We don't want to peel loops when optimizing for size. 54 ; CHECK-LABEL: @optsize 55 ; CHECK: for.body.lr.ph: 56 ; CHECK-NEXT: br label %for.body 57 ; CHECK: for.body: 58 ; CHECK-NOT: br 59 ; CHECK: br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge 60 define void @optsize(i32* %p, i32 %k) #1 !prof !15 { 61 entry: 62 %cmp3 = icmp slt i32 0, %k 63 br i1 %cmp3, label %for.body.lr.ph, label %for.end 64 65 for.body.lr.ph: ; preds = %entry 66 br label %for.body 67 68 for.body: ; preds = %for.body.lr.ph, %for.body 69 %i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ] 70 %p.addr.04 = phi i32* [ %p, %for.body.lr.ph ], [ %incdec.ptr, %for.body ] 71 %incdec.ptr = getelementptr inbounds i32, i32* %p.addr.04, i32 1 72 store i32 %i.05, i32* %p.addr.04, align 4 73 %inc = add nsw i32 %i.05, 1 74 %cmp = icmp slt i32 %inc, %k 75 br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge, !prof !16 76 77 for.cond.for.end_crit_edge: ; preds = %for.body 78 br label %for.end 79 80 for.end: ; preds = %for.cond.for.end_crit_edge, %entry 81 ret void 82 } 83 84 attributes #0 = { nounwind } 85 attributes #1 = { nounwind optsize } 86 87 !llvm.module.flags = !{!1} 88 89 !1 = !{i32 1, !"ProfileSummary", !2} 90 !2 = !{!3, !4, !5, !6, !7, !8, !9, !10} 91 !3 = !{!"ProfileFormat", !"InstrProf"} 92 !4 = !{!"TotalCount", i64 10} 93 !5 = !{!"MaxCount", i64 3} 94 !6 = !{!"MaxInternalCount", i64 1} 95 !7 = !{!"MaxFunctionCount", i64 3} 96 !8 = !{!"NumCounts", i64 2} 97 !9 = !{!"NumFunctions", i64 2} 98 !10 = !{!"DetailedSummary", !11} 99 !11 = !{!12, !13, !14} 100 !12 = !{i32 10000, i64 3, i32 2} 101 !13 = !{i32 999000, i64 1, i32 10} 102 !14 = !{i32 999999, i64 1, i32 10} 103 !15 = !{!"function_entry_count", i64 1} 104 !16 = !{!"branch_weights", i32 3001, i32 1001} 105 106 ;CHECK: !15 = !{!"branch_weights", i32 900, i32 101} 107 ;CHECK: !16 = !{!"branch_weights", i32 540, i32 360} 108 ;CHECK: !17 = !{!"branch_weights", i32 162, i32 378} 109 ;CHECK: !18 = !{!"branch_weights", i32 1399, i32 162} 110 111
