| ; RUN: opt < %s -S -debug-only=loop-unroll -passes=loop-unroll 2>&1 | FileCheck %s |
| ; RUN: opt < %s -S -debug-only=loop-unroll -passes='require<profile-summary>,function(require<opt-remark-emit>,loop-unroll)' 2>&1 | FileCheck %s |
| ; Confirm that peeling is disabled if the number of counts required to reach |
| ; the hot percentile is above the threshold. |
| ; 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>,loop-unroll)' 2>&1 | FileCheck %s --check-prefix=NOPEEL |
| ; REQUIRES: asserts |
| |
| ; Make sure we use the profile information correctly to peel-off 3 iterations |
| ; from the loop, and update the branch weights for the peeled loop properly. |
| |
| ; CHECK: Loop Unroll: F[basic] |
| ; CHECK: PEELING loop %for.body with iteration count 4! |
| ; CHECK: Loop Unroll: F[optsize] |
| ; CHECK-NOT: PEELING |
| |
| ; Confirm that no peeling occurs when we are performing full unrolling. |
| ; RUN: opt < %s -S -debug-only=loop-unroll -passes='require<opt-remark-emit>,loop(loop-unroll-full)' 2>&1 | FileCheck %s --check-prefix=NOPEEL |
| ; NOPEEL-NOT: PEELING |
| |
| ; CHECK-LABEL: @basic |
| ; CHECK: br i1 %{{.*}}, label %[[NEXT0:.*]], label %for.cond.for.end_crit_edge, !prof !15 |
| ; CHECK: [[NEXT0]]: |
| ; CHECK: br i1 %{{.*}}, label %[[NEXT1:.*]], label %for.cond.for.end_crit_edge, !prof !16 |
| ; CHECK: [[NEXT1]]: |
| ; CHECK: br i1 %{{.*}}, label %[[NEXT2:.*]], label %for.cond.for.end_crit_edge, !prof !17 |
| ; CHECK: [[NEXT2]]: |
| ; CHECK: br i1 %{{.*}}, label %for.body, label %{{.*}}, !prof !18 |
| |
| define void @basic(ptr %p, i32 %k) #0 !prof !15 { |
| entry: |
| %cmp3 = icmp slt i32 0, %k |
| br i1 %cmp3, label %for.body.lr.ph, label %for.end |
| |
| for.body.lr.ph: ; preds = %entry |
| br label %for.body |
| |
| for.body: ; preds = %for.body.lr.ph, %for.body |
| %i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ] |
| %p.addr.04 = phi ptr [ %p, %for.body.lr.ph ], [ %incdec.ptr, %for.body ] |
| %incdec.ptr = getelementptr inbounds i32, ptr %p.addr.04, i32 1 |
| store i32 %i.05, ptr %p.addr.04, align 4 |
| %inc = add nsw i32 %i.05, 1 |
| %cmp = icmp slt i32 %inc, %k |
| br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge, !prof !16 |
| |
| for.cond.for.end_crit_edge: ; preds = %for.body |
| br label %for.end |
| |
| for.end: ; preds = %for.cond.for.end_crit_edge, %entry |
| ret void |
| } |
| |
| ; We don't want to peel loops when optimizing for size. |
| ; CHECK-LABEL: @optsize |
| ; CHECK: for.body.lr.ph: |
| ; CHECK-NEXT: br label %for.body |
| ; CHECK: for.body: |
| ; CHECK-NOT: br |
| ; CHECK: br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge |
| define void @optsize(ptr %p, i32 %k) #1 !prof !15 { |
| entry: |
| %cmp3 = icmp slt i32 0, %k |
| br i1 %cmp3, label %for.body.lr.ph, label %for.end |
| |
| for.body.lr.ph: ; preds = %entry |
| br label %for.body |
| |
| for.body: ; preds = %for.body.lr.ph, %for.body |
| %i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ] |
| %p.addr.04 = phi ptr [ %p, %for.body.lr.ph ], [ %incdec.ptr, %for.body ] |
| %incdec.ptr = getelementptr inbounds i32, ptr %p.addr.04, i32 1 |
| store i32 %i.05, ptr %p.addr.04, align 4 |
| %inc = add nsw i32 %i.05, 1 |
| %cmp = icmp slt i32 %inc, %k |
| br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge, !prof !16 |
| |
| for.cond.for.end_crit_edge: ; preds = %for.body |
| br label %for.end |
| |
| for.end: ; preds = %for.cond.for.end_crit_edge, %entry |
| ret void |
| } |
| |
| attributes #0 = { nounwind } |
| attributes #1 = { nounwind optsize } |
| |
| !llvm.module.flags = !{!1} |
| |
| !1 = !{i32 1, !"ProfileSummary", !2} |
| !2 = !{!3, !4, !5, !6, !7, !8, !9, !10} |
| !3 = !{!"ProfileFormat", !"InstrProf"} |
| !4 = !{!"TotalCount", i64 10} |
| !5 = !{!"MaxCount", i64 3} |
| !6 = !{!"MaxInternalCount", i64 1} |
| !7 = !{!"MaxFunctionCount", i64 3} |
| !8 = !{!"NumCounts", i64 2} |
| !9 = !{!"NumFunctions", i64 2} |
| !10 = !{!"DetailedSummary", !11} |
| !11 = !{!12, !13, !14} |
| !12 = !{i32 10000, i64 3, i32 2} |
| !13 = !{i32 999000, i64 1, i32 10} |
| !14 = !{i32 999999, i64 1, i32 10} |
| !15 = !{!"function_entry_count", i64 1} |
| !16 = !{!"branch_weights", i32 3001, i32 1001} |
| |
| ;CHECK: !15 = !{!"branch_weights", i32 3001, i32 1001} |
| ;CHECK: !16 = !{!"branch_weights", i32 2000, i32 1001} |
| ;CHECK: !17 = !{!"branch_weights", i32 999, i32 1001} |
| ;CHECK: !18 = !{!"branch_weights", i32 1, i32 1001} |
| |