| ; RUN: opt < %s -passes='require<profile-summary>,cgscc(inline)' -S -inline-threshold=50 -inline-cold-callsite-threshold=0 -hot-callsite-threshold=50 | FileCheck %s |
| ; This tests incremental updates to caller's BFI as a callee gets inlined. |
| ; In bottom-up inlining, first c->e inlining is considered and fails because |
| ; e's size exceeds the threshold of 50. Then a->c inlining is considered and it |
| ; succeeds. a's BFI is updated incrementally. As c's blocks get pruned, the |
| ; block with label cond_false is removed and since the remanining code is |
| ; straight-line a single block gets cloned into a. This block should get the |
| ; maximum block frequency among the original blocks in c. If it gets the |
| ; frequency of the block with label cond_true in @c, its frequency will be |
| ; 1/10th of function a's entry block frequency, resulting in a callsite count of |
| ; 2 (since a's entry count is 20) which means that a->e callsite will be |
| ; considered cold and not inlined. |
| |
| @data = external global i32 |
| ; CHECK-LABEL: define i32 @a( |
| define i32 @a(i32 %a1) !prof !21 { |
| ; CHECK-NOT: call i32 @c |
| ; CHECK-NOT: call i32 @e |
| ; CHECK: ret |
| entry: |
| %cond = icmp sle i32 %a1, 1 |
| %a2 = call i32 @c(i32 1) |
| br label %exit |
| exit: |
| ret i32 %a2 |
| } |
| |
| declare void @ext(); |
| |
| ; CHECK: @c(i32 %c1) !prof [[COUNT1:![0-9]+]] |
| define i32 @c(i32 %c1) !prof !23 { |
| call void @ext() |
| %cond = icmp sle i32 %c1, 1 |
| br i1 %cond, label %cond_true, label %cond_false, !prof !25 |
| |
| cond_false: |
| br label %exit |
| |
| cond_true: |
| %c11 = call i32 @e(i32 %c1) |
| br label %exit |
| exit: |
| %c12 = phi i32 [ 0, %cond_false], [ %c11, %cond_true ] |
| ret i32 %c12 |
| } |
| |
| |
| ; CHECK: @e(i32 %c1) !prof [[COUNT2:![0-9]+]] |
| define i32 @e(i32 %c1) !prof !24 { |
| call void @ext() |
| call void @ext() |
| %cond = icmp sle i32 %c1, 1 |
| br i1 %cond, label %cond_true, label %cond_false |
| |
| cond_false: |
| call void @ext() |
| %c2 = load i32, ptr @data, align 4 |
| %c3 = add i32 %c1, %c2 |
| %c4 = mul i32 %c3, %c2 |
| %c5 = add i32 %c4, %c2 |
| %c6 = mul i32 %c5, %c2 |
| %c7 = add i32 %c6, %c2 |
| %c8 = mul i32 %c7, %c2 |
| %c9 = add i32 %c8, %c2 |
| %c10 = mul i32 %c9, %c2 |
| ret i32 %c10 |
| |
| cond_true: |
| ret i32 0 |
| } |
| |
| ; CHECK: [[COUNT1]] = !{!"function_entry_count", i64 480} |
| ; CHECK: [[COUNT2]] = !{!"function_entry_count", i64 80} |
| !21 = !{!"function_entry_count", i64 20} |
| !23 = !{!"function_entry_count", i64 500} |
| !24 = !{!"function_entry_count", i64 100} |
| !25 = !{!"branch_weights", i32 1, i32 9} |
| |
| !llvm.module.flags = !{!1} |
| !1 = !{i32 1, !"ProfileSummary", !2} |
| !2 = !{!3, !4, !5, !6, !7, !8, !9, !10} |
| !3 = !{!"ProfileFormat", !"InstrProf"} |
| !4 = !{!"TotalCount", i64 10000} |
| !5 = !{!"MaxCount", i64 1000} |
| !6 = !{!"MaxInternalCount", i64 1} |
| !7 = !{!"MaxFunctionCount", i64 1000} |
| !8 = !{!"NumCounts", i64 3} |
| !9 = !{!"NumFunctions", i64 3} |
| !10 = !{!"DetailedSummary", !11} |
| !11 = !{!12, !13, !14} |
| !12 = !{i32 10000, i64 1000, i32 1} |
| !13 = !{i32 999000, i64 1000, i32 1} |
| !14 = !{i32 999999, i64 5, i32 2} |