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1; RUN: opt < %s -passes='print<block-freq>' -disable-output 2>&1 | FileCheck %s2 3declare void @g(i32 %x)4 5; CHECK-LABEL: Printing analysis {{.*}} for function 'branch_weight_0':6; CHECK-NEXT: block-frequency-info: branch_weight_07define void @branch_weight_0(i32 %a) {8; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]]9entry:10 br label %for.body11 12; Check that we get 1 and a huge frequency instead of 0,3.13; CHECK-NEXT: for.body: float = 2147483647.8,14for.body:15 %i = phi i32 [ 0, %entry ], [ %inc, %for.body ]16 call void @g(i32 %i)17 %inc = add i32 %i, 118 %cmp = icmp ugt i32 %inc, %a19 br i1 %cmp, label %for.end, label %for.body, !prof !020 21; CHECK-NEXT: for.end: float = 1.0, int = [[ENTRY]]22for.end:23 ret void24}25 26!0 = !{!"branch_weights", i32 0, i32 3}27 28; CHECK-LABEL: Printing analysis {{.*}} for function 'infinite_loop'29; CHECK-NEXT: block-frequency-info: infinite_loop30define void @infinite_loop(i1 %x) {31; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]]32entry:33 br i1 %x, label %for.body, label %for.end, !prof !134 35; Check that the infinite loop is arbitrarily scaled to max out at 4096,36; giving 2048 here.37; CHECK-NEXT: for.body: float = 2048.0,38for.body:39 %i = phi i32 [ 0, %entry ], [ %inc, %for.body ]40 call void @g(i32 %i)41 %inc = add i32 %i, 142 br label %for.body43 44; Check that the exit weight is half of entry, since half is lost in the45; infinite loop above.46; CHECK-NEXT: for.end: float = 0.5,47for.end:48 ret void49}50 51!1 = !{!"branch_weights", i32 1, i32 1}52