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swift-mirror/test/Profiler/coverage_if.swift
Hamish Knight c3b055a9a8 [Profiler] Improve if statement coverage 
Fix counters for regions following `else if`s, fix
the counters for `else if` conditions, and fix
handling of `break` statements. Also while here,
clean up the handling of branch exit regions such
that we don't generate multiple overlapping
regions for each branch, but a single region at
the end of the entire `if` statement that accounts
for all exiting control flow.

rdar://104078910
rdar://104079242
2023-12-04 11:09:01 +00:00

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// RUN: %target-swift-frontend -Xllvm -sil-full-demangle -profile-generate -profile-coverage-mapping -emit-sorted-sil -emit-sil -module-name coverage_if %s | %FileCheck %s
// RUN: %target-swift-frontend -profile-generate -profile-coverage-mapping -emit-ir %s
// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo
func foo(x : Bool) { // CHECK: [[@LINE]]:20 -> {{[0-9]+}}:2 : 0
// CHECK: [[@LINE+1]]:6 -> [[@LINE+1]]:9 : 0
if (x) { // CHECK: [[@LINE]]:10 -> [[@LINE+1]]:4 : 1
}
if (!x) { // CHECK: [[@LINE]]:11 -> [[@LINE+2]]:4 : 2
// ...
}
if (x) { } // CHECK: [[@LINE]]:10 -> [[@LINE]]:13 : 3
else { } // CHECK: [[@LINE]]:10 -> [[@LINE]]:13 : (0 - 3)
}
foo(x: true);
foo(x: false);
// rdar://29390569 – Make sure we don't add a spurious unreachable empty region.
// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo1
func foo1() -> Int { // CHECK-NEXT: [[@LINE]]:20 -> {{[0-9]+}}:2 : 0
if .random() { // CHECK-NEXT: [[@LINE]]:6 -> [[@LINE]]:15 : 0
return 0 // CHECK-NEXT: [[@LINE-1]]:16 -> [[@LINE+1]]:4 : 1
} else if .random() { // CHECK-NEXT: [[@LINE]]:13 -> [[@LINE]]:22 : (0 - 1)
return 1 // CHECK-NEXT: [[@LINE-1]]:23 -> [[@LINE+1]]:4 : 2
} else { // CHECK-NEXT: [[@LINE]]:10 -> [[@LINE+2]]:4 : ((0 - 1) - 2)
return 2
} // CHECK-NEXT: }
}
// ...but we will add an unreachable region if you write code there.
// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo2
func foo2() -> Int {
if .random() {
return 0
} else if .random() {
return 1
} else {
return 2
}
_ = foo1() // CHECK: [[@LINE]]:3 -> [[@LINE+1]]:2 : zero
}
// Make sure we don't add unreachable regions for a labeled jump either.
// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo3
func foo3() -> Int { // CHECK-NEXT: [[@LINE]]:20 -> {{[0-9]+}}:2 : 0
x: do { // CHECK-NEXT: [[@LINE]]:9 -> [[@LINE+6]]:4 : 0
if .random() { // CHECK-NEXT: [[@LINE]]:8 -> [[@LINE]]:17 : 0
return 0 // CHECK-NEXT: [[@LINE-1]]:18 -> [[@LINE+1]]:6 : 1
} else { // CHECK-NEXT: [[@LINE]]:12 -> [[@LINE+2]]:6 : (0 - 1)
break x
}
} // CHECK-NEXT: [[@LINE]]:4 -> [[@LINE+1]]:11 : (0 - 1)
return 2
} // CHECK-NEXT: }
// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo4
func foo4() -> Int {
x: do {
if .random() {
return 0
} else {
break x
}
let y = 0 // CHECK: [[@LINE]]:13 -> [[@LINE+1]]:4 : zero
}
return 2
}
// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo5
func foo5() throws -> Int { // CHECK-NEXT: [[@LINE]]:27 -> {{[0-9]+}}:2 : 0
if .random() { // CHECK-NEXT: [[@LINE]]:6 -> [[@LINE]]:15 : 0
return 0 // CHECK-NEXT: [[@LINE-1]]:16 -> [[@LINE+1]]:4 : 1
} else { // CHECK-NEXT: [[@LINE]]:10 -> [[@LINE+3]]:4 : (0 - 1)
struct S: Error {}
throw S()
}
} // CHECK-NEXT: }
// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo6
func foo6(_ x: Int?) -> Int? { // CHECK-NEXT: [[@LINE]]:30 -> {{[0-9]+}}:2 : 0
if let x = x { // CHECK-NEXT: [[@LINE]]:16 -> [[@LINE+2]]:4 : 1
return x
} else { // CHECK-NEXT: [[@LINE]]:10 -> [[@LINE+2]]:4 : (0 - 1)
return nil
}
} // CHECK-NEXT: }
// rdar://104078910, rdar://104079242 - Make sure the else if condition and the
// else gets a correct counter here.
// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo7
func foo7() -> Int { // CHECK-NEXT: [[@LINE]]:20 -> [[@LINE+12]]:2 : 0
let x: Int
if .random() { // CHECK-NEXT: [[@LINE]]:6 -> [[@LINE]]:15 : 0
x = 0 // CHECK-NEXT: [[@LINE-1]]:16 -> [[@LINE+1]]:4 : 1
} else if .random() { // CHECK-NEXT: [[@LINE]]:13 -> [[@LINE]]:22 : (0 - 1)
x = 1 // CHECK-NEXT: [[@LINE-1]]:23 -> [[@LINE+1]]:4 : 2
} else if .random() { // CHECK-NEXT: [[@LINE]]:13 -> [[@LINE]]:22 : ((0 - 1) - 2)
x = 2 // CHECK-NEXT: [[@LINE-1]]:23 -> [[@LINE+1]]:4 : 3
} else { // CHECK-NEXT: [[@LINE]]:10 -> [[@LINE+2]]:4 : (((0 - 1) - 2) - 3)
x = 3
}
return x
} // CHECK-NEXT: }
// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo8
func foo8() -> Int { // CHECK-NEXT: [[@LINE]]:20 -> [[@LINE+12]]:2 : 0
let x: Int // CHECK-NEXT: [[@LINE+1]]:6 -> [[@LINE+1]]:15 : 0
if .random() { // CHECK-NEXT: [[@LINE]]:16 -> [[@LINE+2]]:4 : 1
return 0
} else if .random() { // CHECK-NEXT: [[@LINE]]:13 -> [[@LINE]]:22 : (0 - 1)
x = 1 // CHECK-NEXT: [[@LINE-1]]:23 -> [[@LINE+1]]:4 : 2
} else if .random() { // CHECK-NEXT: [[@LINE]]:13 -> [[@LINE]]:22 : ((0 - 1) - 2)
x = 2 // CHECK-NEXT: [[@LINE-1]]:23 -> [[@LINE+1]]:4 : 3
} else { // CHECK-NEXT: [[@LINE]]:10 -> [[@LINE+2]]:4 : (((0 - 1) - 2) - 3)
x = 3
} // CHECK-NEXT: [[@LINE]]:4 -> [[@LINE+1]]:11 : (0 - 1)
return x
} // CHECK-NEXT: }
// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo9
func foo9() -> Int { // CHECK-NEXT: [[@LINE]]:20 -> [[@LINE+12]]:2 : 0
let x: Int // CHECK-NEXT: [[@LINE+1]]:6 -> [[@LINE+1]]:15 : 0
if .random() { // CHECK-NEXT: [[@LINE]]:16 -> [[@LINE+2]]:4 : 1
return 0
} else if .random() { // CHECK-NEXT: [[@LINE]]:13 -> [[@LINE]]:22 : (0 - 1)
return 1 // CHECK-NEXT: [[@LINE-1]]:23 -> [[@LINE+1]]:4 : 2
} else if .random() { // CHECK-NEXT: [[@LINE]]:13 -> [[@LINE]]:22 : ((0 - 1) - 2)
x = 2 // CHECK-NEXT: [[@LINE-1]]:23 -> [[@LINE+1]]:4 : 3
} else { // CHECK-NEXT: [[@LINE]]:10 -> [[@LINE+2]]:4 : (((0 - 1) - 2) - 3)
x = 3
} // CHECK-NEXT: [[@LINE]]:4 -> [[@LINE+1]]:11 : ((0 - 1) - 2)
return x
} // CHECK-NEXT: }
// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo10
func foo10() -> Int { // CHECK-NEXT: [[@LINE]]:21 -> [[@LINE+12]]:2 : 0
let x: Int // CHECK-NEXT: [[@LINE+1]]:6 -> [[@LINE+1]]:15 : 0
if .random() { // CHECK-NEXT: [[@LINE]]:16 -> [[@LINE+2]]:4 : 1
return 0
} else if .random() { // CHECK-NEXT: [[@LINE]]:13 -> [[@LINE]]:22 : (0 - 1)
return 1 // CHECK-NEXT: [[@LINE-1]]:23 -> [[@LINE+1]]:4 : 2
} else if .random() { // CHECK-NEXT: [[@LINE]]:13 -> [[@LINE]]:22 : ((0 - 1) - 2)
x = 2 // CHECK-NEXT: [[@LINE-1]]:23 -> [[@LINE+1]]:4 : 3
} else { // CHECK-NEXT: [[@LINE]]:10 -> [[@LINE+2]]:4 : (((0 - 1) - 2) - 3)
return 3
} // CHECK-NEXT: [[@LINE]]:4 -> [[@LINE+1]]:11 : 3
return x
} // CHECK-NEXT: }
// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo11
func foo11() -> Int { // CHECK-NEXT: [[@LINE]]:21 -> [[@LINE+12]]:2 : 0
let x: Int // CHECK-NEXT: [[@LINE+1]]:6 -> [[@LINE+1]]:15 : 0
if .random() { // CHECK-NEXT: [[@LINE]]:16 -> [[@LINE+2]]:4 : 1
x = 0
} else if .random() { // CHECK-NEXT: [[@LINE]]:13 -> [[@LINE]]:22 : (0 - 1)
x = 1 // CHECK-NEXT: [[@LINE-1]]:23 -> [[@LINE+1]]:4 : 2
} else if .random() { // CHECK-NEXT: [[@LINE]]:13 -> [[@LINE]]:22 : ((0 - 1) - 2)
x = 2 // CHECK-NEXT: [[@LINE-1]]:23 -> [[@LINE+1]]:4 : 3
} else { // CHECK-NEXT: [[@LINE]]:10 -> [[@LINE+2]]:4 : (((0 - 1) - 2) - 3)
return 3
} // CHECK-NEXT: [[@LINE]]:4 -> [[@LINE+1]]:11 : ((1 + 2) + 3)
return x
} // CHECK-NEXT: }
// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo12
func foo12() -> Int { // CHECK-NEXT: [[@LINE]]:21 -> [[@LINE+9]]:2 : 0
let x: Int
y: if .random() { // CHECK-NEXT: [[@LINE]]:9 -> [[@LINE]]:18 : 0
x = 0 // CHECK-NEXT: [[@LINE-1]]:19 -> [[@LINE+2]]:4 : 1
break y
} else {
x = 1 // CHECK-NEXT: [[@LINE-1]]:10 -> [[@LINE+1]]:4 : (0 - 1)
}
return x
} // CHECK-NEXT: }
// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo13
func foo13() -> Int { // CHECK-NEXT: [[@LINE]]:21 -> [[@LINE+10]]:2 : 0
let x: Int
y: if .random() { // CHECK-NEXT: [[@LINE]]:9 -> [[@LINE]]:18 : 0
x = 0 // CHECK-NEXT: [[@LINE-1]]:19 -> [[@LINE+2]]:4 : 1
break y
} else {
x = 1 // CHECK-NEXT: [[@LINE-1]]:10 -> [[@LINE+2]]:4 : (0 - 1)
break y
}
return x
} // CHECK-NEXT: }
// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo14
func foo14() -> Int { // CHECK-NEXT: [[@LINE]]:21 -> [[@LINE+14]]:2 : 0
let x: Int // CHECK-NEXT: [[@LINE+1]]:9 -> [[@LINE+1]]:18 : 0
y: if .random() { // CHECK-NEXT: [[@LINE]]:19 -> [[@LINE+3]]:4 : 1
x = 0
break y
} else if .random() { // CHECK-NEXT: [[@LINE]]:13 -> [[@LINE]]:22 : (0 - 1)
return 1 // CHECK-NEXT: [[@LINE-1]]:23 -> [[@LINE+1]]:4 : 2
} else if .random() { // CHECK-NEXT: [[@LINE]]:13 -> [[@LINE]]:22 : ((0 - 1) - 2)
x = 2 // CHECK-NEXT: [[@LINE-1]]:23 -> [[@LINE+2]]:4 : 3
break y
} else { // CHECK-NEXT: [[@LINE]]:10 -> [[@LINE+2]]:4 : (((0 - 1) - 2) - 3)
return 3
} // CHECK-NEXT: [[@LINE]]:4 -> [[@LINE+1]]:11 : (1 + 3)
return x
} // CHECK-NEXT: }
// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo15
func foo15() -> Int { // CHECK-NEXT: [[@LINE]]:21 -> [[@LINE+19]]:2 : 0
let x: Int // CHECK-NEXT: [[@LINE+1]]:9 -> [[@LINE+1]]:18 : 0
y: if .random() { // CHECK-NEXT: [[@LINE]]:19 -> [[@LINE+5]]:4 : 1
x = 0
if .random() { // CHECK-NEXT: [[@LINE]]:8 -> [[@LINE]]:17 : 1
break y // CHECK-NEXT: [[@LINE-1]]:18 -> [[@LINE+1]]:6 : 2
} // CHECK-NEXT: [[@LINE]]:6 -> [[@LINE+1]]:4 : (1 - 2)
} else if .random() { // CHECK-NEXT: [[@LINE]]:13 -> [[@LINE]]:22 : (0 - 1)
x = 1 // CHECK-NEXT: [[@LINE-1]]:23 -> [[@LINE+4]]:4 : 3
if .random() { // CHECK-NEXT: [[@LINE]]:8 -> [[@LINE]]:17 : 3
return 1 // CHECK-NEXT: [[@LINE-1]]:18 -> [[@LINE+1]]:6 : 4
} // CHECK-NEXT: [[@LINE]]:6 -> [[@LINE+1]]:4 : (3 - 4)
} else if .random() { // CHECK-NEXT: [[@LINE]]:13 -> [[@LINE]]:22 : ((0 - 1) - 3)
x = 2 // CHECK-NEXT: [[@LINE-1]]:23 -> [[@LINE+2]]:4 : 5
break y
} else { // CHECK-NEXT: [[@LINE]]:10 -> [[@LINE+2]]:4 : (((0 - 1) - 3) - 5)
return 3
} // CHECK-NEXT: [[@LINE]]:4 -> [[@LINE+1]]:11 : (((1 + 3) + 5) - 4)
return x
} // CHECK-NEXT: }
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