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swift-mirror/test/SILGen/availability_query.swift
Erik Eckstein c89df9ec98 Mandatory optimizations: constant fold boolean literals before the DefiniteInitialization pass 
Add a new mandatory BooleanLiteralFolding pass which constant folds conditional branches with boolean literals as operands.

```
  %1 = integer_literal -1
  %2 = apply %bool_init(%1)   // Bool.init(_builtinBooleanLiteral:)
  %3 = struct_extract %2, #Bool._value
  cond_br %3, bb1, bb2
```
->
```
  ...
  br bb1
```

This pass is intended to run before DefiniteInitialization, where mandatory inlining and constant folding didn't run, yet (which would perform this kind of optimization).
This optimization is required to let DefiniteInitialization handle boolean literals correctly.
For example in infinite loops:

```
   init() {
     while true {           // DI need to know that there is no loop exit from this while-statement
       if some_condition {
         member_field = init_value
         break
       }
     }
   }
```
2024-01-10 16:15:57 +01:00

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// RUN: %target-swift-emit-sil %s -target %target-cpu-apple-macosx10.50 -verify
// RUN: %target-swift-emit-silgen %s -target %target-cpu-apple-macosx10.50 | %FileCheck %s
// REQUIRES: OS=macosx
// CHECK-LABEL: sil{{.+}}@main{{.*}} {
// CHECK: [[MAJOR:%.*]] = integer_literal $Builtin.Word, 10
// CHECK: [[MINOR:%.*]] = integer_literal $Builtin.Word, 53
// CHECK: [[PATCH:%.*]] = integer_literal $Builtin.Word, 8
// CHECK: [[FUNC:%.*]] = function_ref @$ss26_stdlib_isOSVersionAtLeastyBi1_Bw_BwBwtF : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
// CHECK: [[QUERY_RESULT:%.*]] = apply [[FUNC]]([[MAJOR]], [[MINOR]], [[PATCH]]) : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
// CHECK-NOT: {{.*}}integer_literal $Builtin.Int1, -1
// CHECK-NOT: builtin "xor_Int1"{{.*}}
if #available(OSX 10.53.8, iOS 7.1, *) {
}
// CHECK: [[MAJOR:%.*]] = integer_literal $Builtin.Word, 10
// CHECK: [[MINOR:%.*]] = integer_literal $Builtin.Word, 53
// CHECK: [[PATCH:%.*]] = integer_literal $Builtin.Word, 8
// CHECK: [[FUNC:%.*]] = function_ref @$ss26_stdlib_isOSVersionAtLeastyBi1_Bw_BwBwtF : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
// CHECK: [[QUERY_RESULT:%.*]] = apply [[FUNC]]([[MAJOR]], [[MINOR]], [[PATCH]]) : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
// CHECK: [[MINUSONE:%.*]] = integer_literal $Builtin.Int1, -1
// CHECK: [[QUERY_INVERSION:%.*]] = builtin "xor_Int1"([[QUERY_RESULT]] : $Builtin.Int1, [[MINUSONE]] : $Builtin.Int1) : $Builtin.Int1
if #unavailable(OSX 10.53.8, iOS 7.1) {
}
// CHECK: [[TRUE:%.*]] = integer_literal $Builtin.Int1, -1
// CHECK: cond_br [[TRUE]]
// Since we are compiling for an unmentioned platform (OS X), we check against the minimum
// deployment target, which is 10.50
if #available(iOS 7.1, *) {
}
// CHECK: [[FALSE:%.*]] = integer_literal $Builtin.Int1, 0
// CHECK: cond_br [[FALSE]]
// Since we are compiling for an unmentioned platform (OS X), we check against the minimum
// deployment target, which is 10.50
if #unavailable(iOS 7.1) {
}
// CHECK: [[MAJOR:%.*]] = integer_literal $Builtin.Word, 10
// CHECK: [[MINOR:%.*]] = integer_literal $Builtin.Word, 52
// CHECK: [[PATCH:%.*]] = integer_literal $Builtin.Word, 0
// CHECK: [[QUERY_FUNC:%.*]] = function_ref @$ss26_stdlib_isOSVersionAtLeastyBi1_Bw_BwBwtF : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
// CHECK: [[QUERY_RESULT:%.*]] = apply [[QUERY_FUNC]]([[MAJOR]], [[MINOR]], [[PATCH]]) : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
// CHECK-NOT: {{.*}}integer_literal $Builtin.Int1, -1
// CHECK-NOT: builtin "xor_Int1"{{.*}}
if #available(OSX 10.52, *) {
}
// CHECK: [[MAJOR:%.*]] = integer_literal $Builtin.Word, 10
// CHECK: [[MINOR:%.*]] = integer_literal $Builtin.Word, 52
// CHECK: [[PATCH:%.*]] = integer_literal $Builtin.Word, 0
// CHECK: [[QUERY_FUNC:%.*]] = function_ref @$ss26_stdlib_isOSVersionAtLeastyBi1_Bw_BwBwtF : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
// CHECK: [[QUERY_RESULT:%.*]] = apply [[QUERY_FUNC]]([[MAJOR]], [[MINOR]], [[PATCH]]) : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
// CHECK: [[MINUSONE:%.*]] = integer_literal $Builtin.Int1, -1
// CHECK: [[QUERY_INVERSION:%.*]] = builtin "xor_Int1"([[QUERY_RESULT]] : $Builtin.Int1, [[MINUSONE]] : $Builtin.Int1) : $Builtin.Int1
if #unavailable(OSX 10.52) {
}
// CHECK: [[MAJOR:%.*]] = integer_literal $Builtin.Word, 10
// CHECK: [[MINOR:%.*]] = integer_literal $Builtin.Word, 52
// CHECK: [[PATCH:%.*]] = integer_literal $Builtin.Word, 0
// CHECK: [[QUERY_FUNC:%.*]] = function_ref @$ss26_stdlib_isOSVersionAtLeastyBi1_Bw_BwBwtF : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
// CHECK: [[QUERY_RESULT:%.*]] = apply [[QUERY_FUNC]]([[MAJOR]], [[MINOR]], [[PATCH]]) : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
// CHECK-NOT: {{.*}}integer_literal $Builtin.Int1, -1
// CHECK-NOT: builtin "xor_Int1"{{.*}}
if #available(macOS 10.52, *) {
}
// CHECK: [[MAJOR:%.*]] = integer_literal $Builtin.Word, 10
// CHECK: [[MINOR:%.*]] = integer_literal $Builtin.Word, 52
// CHECK: [[PATCH:%.*]] = integer_literal $Builtin.Word, 0
// CHECK: [[QUERY_FUNC:%.*]] = function_ref @$ss26_stdlib_isOSVersionAtLeastyBi1_Bw_BwBwtF : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
// CHECK: [[QUERY_RESULT:%.*]] = apply [[QUERY_FUNC]]([[MAJOR]], [[MINOR]], [[PATCH]]) : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
// CHECK: [[MINUSONE:%.*]] = integer_literal $Builtin.Int1, -1
// CHECK: [[QUERY_INVERSION:%.*]] = builtin "xor_Int1"([[QUERY_RESULT]] : $Builtin.Int1, [[MINUSONE]] : $Builtin.Int1) : $Builtin.Int1
if #unavailable(macOS 10.52) {
}
// CHECK: [[MAJOR:%.*]] = integer_literal $Builtin.Word, 10
// CHECK: [[MINOR:%.*]] = integer_literal $Builtin.Word, 0
// CHECK: [[PATCH:%.*]] = integer_literal $Builtin.Word, 0
// CHECK: [[QUERY_FUNC:%.*]] = function_ref @$ss26_stdlib_isOSVersionAtLeastyBi1_Bw_BwBwtF : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
// CHECK: [[QUERY_RESULT:%.*]] = apply [[QUERY_FUNC]]([[MAJOR]], [[MINOR]], [[PATCH]]) : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
// CHECK-NOT: {{.*}}integer_literal $Builtin.Int1, -1
// CHECK-NOT: builtin "xor_Int1"{{.*}}
if #available(OSX 10, *) {
}
// CHECK: [[MAJOR:%.*]] = integer_literal $Builtin.Word, 10
// CHECK: [[MINOR:%.*]] = integer_literal $Builtin.Word, 0
// CHECK: [[PATCH:%.*]] = integer_literal $Builtin.Word, 0
// CHECK: [[QUERY_FUNC:%.*]] = function_ref @$ss26_stdlib_isOSVersionAtLeastyBi1_Bw_BwBwtF : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
// CHECK: [[QUERY_RESULT:%.*]] = apply [[QUERY_FUNC]]([[MAJOR]], [[MINOR]], [[PATCH]]) : $@convention(thin) (Builtin.Word, Builtin.Word, Builtin.Word) -> Builtin.Int1
// CHECK: [[MINUSONE:%.*]] = integer_literal $Builtin.Int1, -1
// CHECK: [[QUERY_INVERSION:%.*]] = builtin "xor_Int1"([[QUERY_RESULT]] : $Builtin.Int1, [[MINUSONE]] : $Builtin.Int1) : $Builtin.Int1
if #unavailable(OSX 10) {
}
// CHECK: }
func doThing() {}
func testUnreachableVersionAvailable(condition: Bool) {
if #available(OSX 10.0, *) {
doThing() // no-warning
return
} else {
doThing() // no-warning
}
if #unavailable(OSX 10.0) {
doThing() // no-warning
} else {
doThing() // no-warning
return
}
if true {
doThing() // no-warning
}
if 1 == 0 { // expected-note {{condition always evaluates to false}}
doThing() // expected-warning {{will never be executed}}
}
}
func testUnreachablePlatformAvailable(condition: Bool) {
if #available(iOS 7.1, *) {
doThing() // no-warning
return
} else {
doThing() // no-warning
}
if #unavailable(iOS 7.1) {
doThing() // no-warning
} else {
doThing() // no-warning
return
}
if true {
doThing() // no-warning
}
if false {
doThing()
}
}
func testUnreachablePlatformAvailableGuard() {
guard #available(iOS 7.1, *) else {
doThing() // no-warning
return
}
guard #unavailable(iOS 7.1) else {
doThing() // no-warning
return
}
doThing() // no-warning
}
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