| ; RUN: opt < %s -passes='print<block-freq>' -disable-output 2>&1 | FileCheck %s |
| |
| ; CHECK-LABEL: Printing analysis {{.*}} for function 'double_exit': |
| ; CHECK-NEXT: block-frequency-info: double_exit |
| define i32 @double_exit(i32 %N) { |
| ; Mass = 1 |
| ; Frequency = 1 |
| ; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]] |
| entry: |
| br label %outer |
| |
| ; Mass = 1 |
| ; Backedge mass = 1/3, exit mass = 2/3 |
| ; Loop scale = 3/2 |
| ; Pseudo-edges = exit |
| ; Pseudo-mass = 1 |
| ; Frequency = 1*3/2*1 = 3/2 |
| ; CHECK-NEXT: outer: float = 1.5, |
| outer: |
| %I.0 = phi i32 [ 0, %entry ], [ %inc6, %outer.inc ] |
| %Return.0 = phi i32 [ 0, %entry ], [ %Return.1, %outer.inc ] |
| %cmp = icmp slt i32 %I.0, %N |
| br i1 %cmp, label %inner, label %exit, !prof !2 ; 2:1 |
| |
| ; Mass = 1 |
| ; Backedge mass = 3/5, exit mass = 2/5 |
| ; Loop scale = 5/2 |
| ; Pseudo-edges = outer.inc @ 1/5, exit @ 1/5 |
| ; Pseudo-mass = 2/3 |
| ; Frequency = 3/2*1*5/2*2/3 = 5/2 |
| ; CHECK-NEXT: inner: float = 2.5, |
| inner: |
| %Return.1 = phi i32 [ %Return.0, %outer ], [ %call4, %inner.inc ] |
| %J.0 = phi i32 [ %I.0, %outer ], [ %inc, %inner.inc ] |
| %cmp2 = icmp slt i32 %J.0, %N |
| br i1 %cmp2, label %inner.body, label %outer.inc, !prof !1 ; 4:1 |
| |
| ; Mass = 4/5 |
| ; Frequency = 5/2*4/5 = 2 |
| ; CHECK-NEXT: inner.body: float = 2.0, |
| inner.body: |
| %call = call i32 @c2(i32 %I.0, i32 %J.0) |
| %tobool = icmp ne i32 %call, 0 |
| br i1 %tobool, label %exit, label %inner.inc, !prof !0 ; 3:1 |
| |
| ; Mass = 3/5 |
| ; Frequency = 5/2*3/5 = 3/2 |
| ; CHECK-NEXT: inner.inc: float = 1.5, |
| inner.inc: |
| %call4 = call i32 @logic2(i32 %Return.1, i32 %I.0, i32 %J.0) |
| %inc = add nsw i32 %J.0, 1 |
| br label %inner |
| |
| ; Mass = 1/3 |
| ; Frequency = 3/2*1/3 = 1/2 |
| ; CHECK-NEXT: outer.inc: float = 0.5, |
| outer.inc: |
| %inc6 = add nsw i32 %I.0, 1 |
| br label %outer |
| |
| ; Mass = 1 |
| ; Frequency = 1 |
| ; CHECK-NEXT: exit: float = 1.0, int = [[ENTRY]] |
| exit: |
| %Return.2 = phi i32 [ %Return.1, %inner.body ], [ %Return.0, %outer ] |
| ret i32 %Return.2 |
| } |
| |
| !0 = !{!"branch_weights", i32 1, i32 3} |
| !1 = !{!"branch_weights", i32 4, i32 1} |
| !2 = !{!"branch_weights", i32 2, i32 1} |
| |
| declare i32 @c2(i32, i32) |
| declare i32 @logic2(i32, i32, i32) |
| |
| ; CHECK-LABEL: Printing analysis {{.*}} for function 'double_exit_in_loop': |
| ; CHECK-NEXT: block-frequency-info: double_exit_in_loop |
| define i32 @double_exit_in_loop(i32 %N) { |
| ; Mass = 1 |
| ; Frequency = 1 |
| ; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]] |
| entry: |
| br label %outer |
| |
| ; Mass = 1 |
| ; Backedge mass = 1/2, exit mass = 1/2 |
| ; Loop scale = 2 |
| ; Pseudo-edges = exit |
| ; Pseudo-mass = 1 |
| ; Frequency = 1*2*1 = 2 |
| ; CHECK-NEXT: outer: float = 2.0, |
| outer: |
| %I.0 = phi i32 [ 0, %entry ], [ %inc12, %outer.inc ] |
| %Return.0 = phi i32 [ 0, %entry ], [ %Return.3, %outer.inc ] |
| %cmp = icmp slt i32 %I.0, %N |
| br i1 %cmp, label %middle, label %exit, !prof !3 ; 1:1 |
| |
| ; Mass = 1 |
| ; Backedge mass = 1/3, exit mass = 2/3 |
| ; Loop scale = 3/2 |
| ; Pseudo-edges = outer.inc |
| ; Pseudo-mass = 1/2 |
| ; Frequency = 2*1*3/2*1/2 = 3/2 |
| ; CHECK-NEXT: middle: float = 1.5, |
| middle: |
| %J.0 = phi i32 [ %I.0, %outer ], [ %inc9, %middle.inc ] |
| %Return.1 = phi i32 [ %Return.0, %outer ], [ %Return.2, %middle.inc ] |
| %cmp2 = icmp slt i32 %J.0, %N |
| br i1 %cmp2, label %inner, label %outer.inc, !prof !2 ; 2:1 |
| |
| ; Mass = 1 |
| ; Backedge mass = 3/5, exit mass = 2/5 |
| ; Loop scale = 5/2 |
| ; Pseudo-edges = middle.inc @ 1/5, outer.inc @ 1/5 |
| ; Pseudo-mass = 2/3 |
| ; Frequency = 3/2*1*5/2*2/3 = 5/2 |
| ; CHECK-NEXT: inner: float = 2.5, |
| inner: |
| %Return.2 = phi i32 [ %Return.1, %middle ], [ %call7, %inner.inc ] |
| %K.0 = phi i32 [ %J.0, %middle ], [ %inc, %inner.inc ] |
| %cmp5 = icmp slt i32 %K.0, %N |
| br i1 %cmp5, label %inner.body, label %middle.inc, !prof !1 ; 4:1 |
| |
| ; Mass = 4/5 |
| ; Frequency = 5/2*4/5 = 2 |
| ; CHECK-NEXT: inner.body: float = 2.0, |
| inner.body: |
| %call = call i32 @c3(i32 %I.0, i32 %J.0, i32 %K.0) |
| %tobool = icmp ne i32 %call, 0 |
| br i1 %tobool, label %outer.inc, label %inner.inc, !prof !0 ; 3:1 |
| |
| ; Mass = 3/5 |
| ; Frequency = 5/2*3/5 = 3/2 |
| ; CHECK-NEXT: inner.inc: float = 1.5, |
| inner.inc: |
| %call7 = call i32 @logic3(i32 %Return.2, i32 %I.0, i32 %J.0, i32 %K.0) |
| %inc = add nsw i32 %K.0, 1 |
| br label %inner |
| |
| ; Mass = 1/3 |
| ; Frequency = 3/2*1/3 = 1/2 |
| ; CHECK-NEXT: middle.inc: float = 0.5, |
| middle.inc: |
| %inc9 = add nsw i32 %J.0, 1 |
| br label %middle |
| |
| ; Mass = 1/2 |
| ; Frequency = 2*1/2 = 1 |
| ; CHECK-NEXT: outer.inc: float = 1.0, |
| outer.inc: |
| %Return.3 = phi i32 [ %Return.2, %inner.body ], [ %Return.1, %middle ] |
| %inc12 = add nsw i32 %I.0, 1 |
| br label %outer |
| |
| ; Mass = 1 |
| ; Frequency = 1 |
| ; CHECK-NEXT: exit: float = 1.0, int = [[ENTRY]] |
| exit: |
| ret i32 %Return.0 |
| } |
| |
| !3 = !{!"branch_weights", i32 1, i32 1} |
| |
| declare i32 @c3(i32, i32, i32) |
| declare i32 @logic3(i32, i32, i32, i32) |