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