| ; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s |
| |
| ; Cold function, %dup should not be duplicated into predecessors. |
| define i32 @cold(i32 %a, i32* %p, i32* %q) !prof !21 { |
| ; CHECK-LABEL: cold |
| ; CHECK: %entry |
| ; CHECK: %true1 |
| ; CHECK: %dup |
| ; CHECK: %true2 |
| ; CHECK: %false1 |
| ; CHECK: %false2 |
| entry: |
| %cond1 = icmp sgt i32 %a, 1 |
| br i1 %cond1, label %true1, label %false1, !prof !30 |
| |
| true1: |
| %v1 = load i32, i32* %p, align 4 |
| %v2 = add i32 %v1, 2 |
| br label %dup |
| |
| false1: |
| %v3 = load i32, i32* %q, align 4 |
| %v4 = sub i32 %v3, 3 |
| br label %dup |
| |
| dup: |
| %v5 = phi i32 [%v2, %true1], [%v4, %false1] |
| %cond2 = icmp sgt i32 %v5, 4 |
| br i1 %cond2, label %true2, label %false2, !prof !30 |
| |
| true2: |
| %v6 = xor i32 %v5, %a |
| br label %exit |
| |
| false2: |
| %v7 = and i32 %v5, %a |
| br label %exit |
| |
| exit: |
| %v8 = phi i32 [%v6, %true2], [%v7, %false2] |
| ret i32 %v8 |
| } |
| |
| ; Same code as previous function, but with hot profile count. |
| ; So %dup should be duplicated into predecessors. |
| define i32 @hot(i32 %a, i32* %p, i32* %q) !prof !22 { |
| ; CHECK-LABEL: hot |
| ; CHECK: %entry |
| ; CHECK: %true1 |
| ; CHECK: %false2 |
| ; CHECK: %false1 |
| ; CHECK: %true2 |
| entry: |
| %cond1 = icmp sgt i32 %a, 1 |
| br i1 %cond1, label %true1, label %false1, !prof !30 |
| |
| true1: |
| %v1 = load i32, i32* %p, align 4 |
| %v2 = add i32 %v1, 2 |
| br label %dup |
| |
| false1: |
| %v3 = load i32, i32* %q, align 4 |
| %v4 = sub i32 %v3, 3 |
| br label %dup |
| |
| dup: |
| %v5 = phi i32 [%v2, %true1], [%v4, %false1] |
| %cond2 = icmp sgt i32 %v5, 4 |
| br i1 %cond2, label %true2, label %false2, !prof !30 |
| |
| true2: |
| %v6 = xor i32 %v5, %a |
| br label %exit |
| |
| false2: |
| %v7 = and i32 %v5, %a |
| br label %exit |
| |
| exit: |
| %v8 = phi i32 [%v6, %true2], [%v7, %false2] |
| ret i32 %v8 |
| } |
| |
| |
| !llvm.module.flags = !{!1} |
| !21 = !{!"function_entry_count", i64 10} |
| !22 = !{!"function_entry_count", i64 400} |
| |
| !30 = !{!"branch_weights", i32 1, i32 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 10} |
| !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 100, i32 1} |
| !13 = !{i32 999000, i64 100, i32 1} |
| !14 = !{i32 999999, i64 1, i32 2} |