1 ; RUN: llc < %s -march=x86-64 | FileCheck %s 2 3 define void @test(i1 %cnd) !prof !{!"function_entry_count", i64 1024} { 4 ; CHECK-LABEL: @test 5 ; Using the assembly comments to indicate block order.. 6 ; CHECK: # %loop 7 ; CHECK: # %backedge 8 ; CHECK: # %exit 9 ; CHECK: # %rare 10 ; CHECK: # %rare.1 11 12 br i1 undef, label %rare.1, label %preheader, !prof !{!"branch_weights", i32 0, i32 1000} 13 rare.1: 14 call void @foo() 15 br label %preheader 16 17 preheader: 18 br label %loop 19 20 loop: 21 %iv = phi i32 [0, %preheader], [%iv.next, %backedge] 22 call void @foo() 23 br i1 %cnd, label %backedge, label %rare, !prof !{!"branch_weights", i32 1000000, i32 1} 24 rare: 25 call void @foo() 26 br label %backedge 27 backedge: 28 call void @foo() 29 %iv.next = add i32 %iv, 1 30 %cmp = icmp eq i32 %iv.next, 200 31 br i1 %cmp, label %loop, label %exit, !prof !{!"branch_weights", i32 1000, i32 1} 32 33 exit: 34 ret void 35 36 } 37 38 39 declare void @foo() 40
