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d1eb6f9465
When computing the counter for the region following a labeled statement such as `if`, avoid adding a new empty region if the counter for such a region is known to be zero, i.e unreachable. This avoids adding spurious unreachable regions after an if statements where each branch returns, throws, or otherwise jumps to a parent statement. We will however still add the region if any code follows such a statement, making it non-empty. rdar://29390569
91 lines
3.5 KiB
Swift
91 lines
3.5 KiB
Swift
// 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
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// RUN: %target-swift-frontend -profile-generate -profile-coverage-mapping -emit-ir %s
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// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo
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func foo(x : Bool) { // CHECK: [[@LINE]]:20 -> {{[0-9]+}}:2 : 0
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// CHECK: [[@LINE+1]]:6 -> [[@LINE+1]]:9 : 0
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if (x) { // CHECK: [[@LINE]]:10 -> [[@LINE+1]]:4 : 1
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}
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if (!x) { // CHECK: [[@LINE]]:11 -> [[@LINE+2]]:4 : 2
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// ...
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}
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if (x) { } // CHECK: [[@LINE]]:10 -> [[@LINE]]:13 : 3
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else { } // CHECK: [[@LINE]]:10 -> [[@LINE]]:13 : (0 - 3)
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}
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foo(x: true);
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foo(x: false);
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// rdar://29390569 – Make sure we don't add a spurious unreachable empty region.
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// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo1
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func foo1() -> Int { // CHECK: [[@LINE]]:20 -> {{[0-9]+}}:2 : 0
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if .random() { // CHECK: [[@LINE]]:6 -> [[@LINE]]:15 : 0
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return 0 // CHECK: [[@LINE-1]]:16 -> [[@LINE+2]]:4 : 1
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// CHECK: [[@LINE+1]]:4 -> {{[0-9]+}}:2 : (0 - 1)
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} else if .random() { // CHECK: [[@LINE]]:13 -> [[@LINE]]:22 : (0 - 1)
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return 1 // CHECK: [[@LINE-1]]:23 -> [[@LINE+1]]:4 : 2
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} else { // CHECK: [[@LINE]]:4 -> {{[0-9]+}}:2 : ((0 - 1) - 2)
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return 2 // CHECK: [[@LINE-1]]:10 -> [[@LINE+1]]:4 : ((0 - 1) - 2)
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} // CHECK-NOT: zero
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}
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// ...but we will add an unreachable region if you write code there.
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// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo2
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func foo2() -> Int {
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if .random() {
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return 0
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} else if .random() {
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return 1
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} else {
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return 2
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}
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_ = foo1() // CHECK: [[@LINE]]:3 -> [[@LINE+1]]:2 : zero
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}
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// Make sure we don't add unreachable regions for a labeled jump either.
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// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo3
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func foo3() -> Int { // CHECK: [[@LINE]]:20 -> {{[0-9]+}}:2 : 0
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x: do { // CHECK: [[@LINE]]:9 -> [[@LINE+6]]:4 : 0
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if .random() { // CHECK: [[@LINE]]:8 -> [[@LINE]]:17 : 0
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return 0 // CHECK: [[@LINE-1]]:18 -> [[@LINE+1]]:6 : 1
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} else { // CHECK: [[@LINE]]:6 -> [[@LINE+3]]:4 : (0 - 1)
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break x // CHECK: [[@LINE-1]]:12 -> [[@LINE+1]]:6 : (0 - 1)
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} // CHECK-NOT: zero
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}
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return 2
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}
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// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo4
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func foo4() -> Int {
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x: do {
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if .random() {
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return 0
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} else {
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break x
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}
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let y = 0 // CHECK: [[@LINE]]:13 -> [[@LINE+1]]:4 : zero
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}
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return 2
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}
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// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo5
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func foo5() throws -> Int { // CHECK: [[@LINE]]:27 -> {{[0-9]+}}:2 : 0
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if .random() { // CHECK: [[@LINE]]:6 -> [[@LINE]]:15 : 0
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return 0 // CHECK: [[@LINE-1]]:16 -> [[@LINE+1]]:4 : 1
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} else { // CHECK: [[@LINE]]:4 -> {{[0-9]+}}:2 : (0 - 1)
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struct S: Error {} // CHECK: [[@LINE-1]]:10 -> [[@LINE+2]]:4 : (0 - 1)
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throw S()
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} // CHECK-NOT: zero
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}
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// CHECK-LABEL: sil_coverage_map {{.*}}// coverage_if.foo6
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func foo6(_ x: Int?) -> Int? { // CHECK: [[@LINE]]:30 -> {{[0-9]+}}:2 : 0
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if let x = x {
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return x // CHECK: [[@LINE-1]]:16 -> [[@LINE+1]]:4 : 1
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} else { // CHECK: [[@LINE]]:4 -> {{[0-9]+}}:2 : (0 - 1)
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return nil // CHECK: [[@LINE-1]]:10 -> [[@LINE+1]]:4 : (0 - 1)
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} // CHECK-NOT: zero
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}
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