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1; RUN: opt < %s -passes='print<block-freq>' -disable-output 2>&1 | FileCheck %s2 3define i32 @test1(i32 %i, ptr %a) {4; CHECK-LABEL: Printing analysis {{.*}} for function 'test1':5; CHECK-NEXT: block-frequency-info: test16; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]]7entry:8 br label %body9 10; Loop backedges are weighted and thus their bodies have a greater frequency.11; CHECK-NEXT: body: float = 32.0,12body:13 %iv = phi i32 [ 0, %entry ], [ %next, %body ]14 %base = phi i32 [ 0, %entry ], [ %sum, %body ]15 %arrayidx = getelementptr inbounds i32, ptr %a, i32 %iv16 %0 = load i32, ptr %arrayidx17 %sum = add nsw i32 %0, %base18 %next = add i32 %iv, 119 %exitcond = icmp eq i32 %next, %i20 br i1 %exitcond, label %exit, label %body21 22; CHECK-NEXT: exit: float = 1.0, int = [[ENTRY]]23exit:24 ret i32 %sum25}26 27define i32 @test2(i32 %i, i32 %a, i32 %b) {28; CHECK-LABEL: Printing analysis {{.*}} for function 'test2':29; CHECK-NEXT: block-frequency-info: test230; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]]31entry:32 %cond = icmp ult i32 %i, 4233 br i1 %cond, label %then, label %else, !prof !034 35; The 'then' branch is predicted more likely via branch weight metadata.36; CHECK-NEXT: then: float = 0.9411{{[0-9]*}},37then:38 br label %exit39 40; CHECK-NEXT: else: float = 0.05882{{[0-9]*}},41else:42 br label %exit43 44; CHECK-NEXT: exit: float = 1.0, int = [[ENTRY]]45exit:46 %result = phi i32 [ %a, %then ], [ %b, %else ]47 ret i32 %result48}49 50!0 = !{!"branch_weights", i32 64, i32 4}51 52define i32 @test3(i32 %i, i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) {53; CHECK-LABEL: Printing analysis {{.*}} for function 'test3':54; CHECK-NEXT: block-frequency-info: test355; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]]56entry:57 switch i32 %i, label %case_a [ i32 1, label %case_b58 i32 2, label %case_c59 i32 3, label %case_d60 i32 4, label %case_e ], !prof !161 62; CHECK-NEXT: case_a: float = 0.05,63case_a:64 br label %exit65 66; CHECK-NEXT: case_b: float = 0.05,67case_b:68 br label %exit69 70; The 'case_c' branch is predicted more likely via branch weight metadata.71; CHECK-NEXT: case_c: float = 0.8,72case_c:73 br label %exit74 75; CHECK-NEXT: case_d: float = 0.05,76case_d:77 br label %exit78 79; CHECK-NEXT: case_e: float = 0.05,80case_e:81 br label %exit82 83; CHECK-NEXT: exit: float = 1.0, int = [[ENTRY]]84exit:85 %result = phi i32 [ %a, %case_a ],86 [ %b, %case_b ],87 [ %c, %case_c ],88 [ %d, %case_d ],89 [ %e, %case_e ]90 ret i32 %result91}92 93!1 = !{!"branch_weights", i32 4, i32 4, i32 64, i32 4, i32 4}94 95define void @nested_loops(i32 %a) {96; CHECK-LABEL: Printing analysis {{.*}} for function 'nested_loops':97; CHECK-NEXT: block-frequency-info: nested_loops98; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]]99entry:100 br label %for.cond1.preheader101 102; CHECK-NEXT: for.cond1.preheader: float = 4001.0,103for.cond1.preheader:104 %x.024 = phi i32 [ 0, %entry ], [ %inc12, %for.inc11 ]105 br label %for.cond4.preheader106 107; CHECK-NEXT: for.cond4.preheader: float = 16007984.8,108for.cond4.preheader:109 %y.023 = phi i32 [ 0, %for.cond1.preheader ], [ %inc9, %for.inc8 ]110 %add = add i32 %y.023, %x.024111 br label %for.body6112 113; CHECK-NEXT: for.body6: float = 64047914563.9,114for.body6:115 %z.022 = phi i32 [ 0, %for.cond4.preheader ], [ %inc, %for.body6 ]116 %add7 = add i32 %add, %z.022117 tail call void @g(i32 %add7)118 %inc = add i32 %z.022, 1119 %cmp5 = icmp ugt i32 %inc, %a120 br i1 %cmp5, label %for.inc8, label %for.body6, !prof !2121 122; CHECK-NEXT: for.inc8: float = 16007984.8,123for.inc8:124 %inc9 = add i32 %y.023, 1125 %cmp2 = icmp ugt i32 %inc9, %a126 br i1 %cmp2, label %for.inc11, label %for.cond4.preheader, !prof !2127 128; CHECK-NEXT: for.inc11: float = 4001.0,129for.inc11:130 %inc12 = add i32 %x.024, 1131 %cmp = icmp ugt i32 %inc12, %a132 br i1 %cmp, label %for.end13, label %for.cond1.preheader, !prof !2133 134; CHECK-NEXT: for.end13: float = 1.0, int = [[ENTRY]]135for.end13:136 ret void137}138 139declare void @g(i32)140 141!2 = !{!"branch_weights", i32 1, i32 4000}142