46 lines
1.1 KiB
LLVM
46 lines
1.1 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 'loop_with_branch':
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; CHECK-NEXT: block-frequency-info: loop_with_branch
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define void @loop_with_branch(i32 %a) {
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; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]]
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entry:
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%skip_loop = call i1 @foo0(i32 %a)
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br i1 %skip_loop, label %skip, label %header, !prof !0
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; CHECK-NEXT: skip: float = 0.25,
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skip:
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br label %exit
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; CHECK-NEXT: header: float = 4.5,
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header:
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%i = phi i32 [ 0, %entry ], [ %i.next, %back ]
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%i.next = add i32 %i, 1
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%choose = call i2 @foo1(i32 %i)
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switch i2 %choose, label %exit [ i2 0, label %left
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i2 1, label %right ], !prof !1
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; CHECK-NEXT: left: float = 1.5,
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left:
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br label %back
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; CHECK-NEXT: right: float = 2.25,
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right:
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br label %back
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; CHECK-NEXT: back: float = 3.75,
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back:
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br label %header
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; CHECK-NEXT: exit: float = 1.0, int = [[ENTRY]]
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exit:
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ret void
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}
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declare i1 @foo0(i32)
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declare i2 @foo1(i32)
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!0 = !{!"branch_weights", i32 1, i32 3}
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!1 = !{!"branch_weights", i32 1, i32 2, i32 3}
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