| ; RUN: opt < %s -analyze -block-freq -enable-new-pm=0 | FileCheck %s |
| ; RUN: opt < %s -analyze -lazy-block-freq -enable-new-pm=0 | FileCheck %s |
| ; RUN: opt < %s -passes='print<block-freq>' -disable-output 2>&1 | FileCheck %s |
| |
| define i32 @test1(i32 %i, i32* %a) { |
| ; CHECK-LABEL: Printing analysis {{.*}} for function 'test1': |
| ; CHECK-NEXT: block-frequency-info: test1 |
| ; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]] |
| entry: |
| br label %body |
| |
| ; Loop backedges are weighted and thus their bodies have a greater frequency. |
| ; CHECK-NEXT: body: float = 32.0, |
| body: |
| %iv = phi i32 [ 0, %entry ], [ %next, %body ] |
| %base = phi i32 [ 0, %entry ], [ %sum, %body ] |
| %arrayidx = getelementptr inbounds i32, i32* %a, i32 %iv |
| %0 = load i32, i32* %arrayidx |
| %sum = add nsw i32 %0, %base |
| %next = add i32 %iv, 1 |
| %exitcond = icmp eq i32 %next, %i |
| br i1 %exitcond, label %exit, label %body |
| |
| ; CHECK-NEXT: exit: float = 1.0, int = [[ENTRY]] |
| exit: |
| ret i32 %sum |
| } |
| |
| define i32 @test2(i32 %i, i32 %a, i32 %b) { |
| ; CHECK-LABEL: Printing analysis {{.*}} for function 'test2': |
| ; CHECK-NEXT: block-frequency-info: test2 |
| ; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]] |
| entry: |
| %cond = icmp ult i32 %i, 42 |
| br i1 %cond, label %then, label %else, !prof !0 |
| |
| ; The 'then' branch is predicted more likely via branch weight metadata. |
| ; CHECK-NEXT: then: float = 0.9411{{[0-9]*}}, |
| then: |
| br label %exit |
| |
| ; CHECK-NEXT: else: float = 0.05882{{[0-9]*}}, |
| else: |
| br label %exit |
| |
| ; CHECK-NEXT: exit: float = 1.0, int = [[ENTRY]] |
| exit: |
| %result = phi i32 [ %a, %then ], [ %b, %else ] |
| ret i32 %result |
| } |
| |
| !0 = !{!"branch_weights", i32 64, i32 4} |
| |
| define i32 @test3(i32 %i, i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) { |
| ; CHECK-LABEL: Printing analysis {{.*}} for function 'test3': |
| ; CHECK-NEXT: block-frequency-info: test3 |
| ; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]] |
| entry: |
| switch i32 %i, label %case_a [ i32 1, label %case_b |
| i32 2, label %case_c |
| i32 3, label %case_d |
| i32 4, label %case_e ], !prof !1 |
| |
| ; CHECK-NEXT: case_a: float = 0.05, |
| case_a: |
| br label %exit |
| |
| ; CHECK-NEXT: case_b: float = 0.05, |
| case_b: |
| br label %exit |
| |
| ; The 'case_c' branch is predicted more likely via branch weight metadata. |
| ; CHECK-NEXT: case_c: float = 0.8, |
| case_c: |
| br label %exit |
| |
| ; CHECK-NEXT: case_d: float = 0.05, |
| case_d: |
| br label %exit |
| |
| ; CHECK-NEXT: case_e: float = 0.05, |
| case_e: |
| br label %exit |
| |
| ; CHECK-NEXT: exit: float = 1.0, int = [[ENTRY]] |
| exit: |
| %result = phi i32 [ %a, %case_a ], |
| [ %b, %case_b ], |
| [ %c, %case_c ], |
| [ %d, %case_d ], |
| [ %e, %case_e ] |
| ret i32 %result |
| } |
| |
| !1 = !{!"branch_weights", i32 4, i32 4, i32 64, i32 4, i32 4} |
| |
| define void @nested_loops(i32 %a) { |
| ; CHECK-LABEL: Printing analysis {{.*}} for function 'nested_loops': |
| ; CHECK-NEXT: block-frequency-info: nested_loops |
| ; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]] |
| entry: |
| br label %for.cond1.preheader |
| |
| ; CHECK-NEXT: for.cond1.preheader: float = 4001.0, |
| for.cond1.preheader: |
| %x.024 = phi i32 [ 0, %entry ], [ %inc12, %for.inc11 ] |
| br label %for.cond4.preheader |
| |
| ; CHECK-NEXT: for.cond4.preheader: float = 16007984.8, |
| for.cond4.preheader: |
| %y.023 = phi i32 [ 0, %for.cond1.preheader ], [ %inc9, %for.inc8 ] |
| %add = add i32 %y.023, %x.024 |
| br label %for.body6 |
| |
| ; CHECK-NEXT: for.body6: float = 64047914563.9, |
| for.body6: |
| %z.022 = phi i32 [ 0, %for.cond4.preheader ], [ %inc, %for.body6 ] |
| %add7 = add i32 %add, %z.022 |
| tail call void @g(i32 %add7) |
| %inc = add i32 %z.022, 1 |
| %cmp5 = icmp ugt i32 %inc, %a |
| br i1 %cmp5, label %for.inc8, label %for.body6, !prof !2 |
| |
| ; CHECK-NEXT: for.inc8: float = 16007984.8, |
| for.inc8: |
| %inc9 = add i32 %y.023, 1 |
| %cmp2 = icmp ugt i32 %inc9, %a |
| br i1 %cmp2, label %for.inc11, label %for.cond4.preheader, !prof !2 |
| |
| ; CHECK-NEXT: for.inc11: float = 4001.0, |
| for.inc11: |
| %inc12 = add i32 %x.024, 1 |
| %cmp = icmp ugt i32 %inc12, %a |
| br i1 %cmp, label %for.end13, label %for.cond1.preheader, !prof !2 |
| |
| ; CHECK-NEXT: for.end13: float = 1.0, int = [[ENTRY]] |
| for.end13: |
| ret void |
| } |
| |
| declare void @g(i32) |
| |
| !2 = !{!"branch_weights", i32 1, i32 4000} |