switch.ll
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; RUN: opt < %s -analyze -branch-prob -enable-new-pm=0 | FileCheck %s
; RUN: opt < %s -analyze -lazy-branch-prob -enable-new-pm=0 | FileCheck %s
; RUN: opt < %s -passes='print<branch-prob>' -disable-output 2>&1 | FileCheck %s
declare void @g(i32)
; Check correctness of reported probabilities in case of multiple edges between
; basic blocks. In this case sum of probabilities over all edges should be
; returned by BranchProbabilityInfo::getEdgeProbability.
define void @test1(i32 %x) {
;CHECK: edge entry -> return probability is 0x0ccccccd / 0x80000000 = 10.00%
;CHECK: edge entry -> bb0 probability is 0x26666666 / 0x80000000 = 30.00%
;CHECK: edge entry -> bb0 probability is 0x26666666 / 0x80000000 = 30.00%
;CHECK: edge entry -> bb0 probability is 0x26666666 / 0x80000000 = 30.00%
;CHECK: edge entry -> bb1 probability is 0x26666666 / 0x80000000 = 30.00%
;CHECK: edge entry -> bb1 probability is 0x26666666 / 0x80000000 = 30.00%
;CHECK: edge entry -> bb1 probability is 0x26666666 / 0x80000000 = 30.00%
;CHECK: edge entry -> bb2 probability is 0x26666666 / 0x80000000 = 30.00%
;CHECK: edge entry -> bb2 probability is 0x26666666 / 0x80000000 = 30.00%
;CHECK: edge entry -> bb2 probability is 0x26666666 / 0x80000000 = 30.00%
;CHECK: edge bb0 -> return probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
;CHECK: edge bb1 -> return probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
;CHECK: edge bb2 -> return probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
entry:
switch i32 %x, label %return [
i32 0, label %bb0
i32 3, label %bb0
i32 6, label %bb0
i32 1, label %bb1
i32 4, label %bb1
i32 7, label %bb1
i32 2, label %bb2
i32 5, label %bb2
i32 8, label %bb2
]
bb0: ; preds = %entry, %entry, %entry
tail call void @g(i32 0)
br label %return
bb1: ; preds = %entry, %entry, %entry
tail call void @g(i32 1)
br label %return
bb2: ; preds = %entry, %entry, %entry
tail call void @g(i32 2)
br label %return
return: ; preds = %bb2, %bb1, %bb0, %entry
ret void
}