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ba4081ee76
PredictableMemoryAccessOptimizations has become unmaintainable as-is. RedundantLoadElimination does (almost) the same thing as PredictableMemoryAccessOptimizations. It's not as powerful but good enough because PredictableMemoryAccessOptimizations is actually only needed for promoting integer values for mandatory constant propagation. And most importantly: RedundantLoadElimination does not insert additional copies which was a big problem in PredictableMemoryAccessOptimizations. Fixes rdar://142814676
77 lines
3.6 KiB
Swift
77 lines
3.6 KiB
Swift
// RUN: %target-swift-frontend -emit-silgen -enable-experimental-feature ReferenceBindings -o - %s | %FileCheck %s
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// RUN: %target-swift-frontend -emit-sil -sil-verify-all -enable-experimental-feature ReferenceBindings -o - %s | %FileCheck -check-prefix=SIL %s
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// REQUIRES: swift_feature_ReferenceBindings
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class Klass {}
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struct S {
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var k = Klass()
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}
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func doSomething() {}
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// Before the transformation, our access scope is not to end of scope... so
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// doSomething() is not within the access scope.
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//
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// CHECK-LABEL: sil hidden [ossa] @$s18reference_bindings13testBindToVaryyF : $@convention(thin) () -> () {
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// CHECK: [[BOX:%.*]] = alloc_box ${ var Int }, var, name "x"
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// CHECK: [[LIFETIME:%.*]] = begin_borrow [var_decl] %0
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// CHECK: [[PROJECT:%.*]] = project_box [[LIFETIME]]
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// CHECK: [[INOUT_BOX:%.*]] = alloc_box ${ var Int }, var, name "x2"
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// CHECK: [[UNRESOLVED_BINDING:%.*]] = mark_unresolved_reference_binding [inout] [[INOUT_BOX]]
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// CHECK: [[INOUT_LIFETIME:%.*]] = begin_borrow [var_decl] [[UNRESOLVED_BINDING]]
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// CHECK: [[INOUT_PROJECT:%.*]] = project_box [[INOUT_LIFETIME]]
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// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[PROJECT]]
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// CHECK: copy_addr [[ACCESS]] to [init] [[INOUT_PROJECT]]
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// CHECK: end_access [[ACCESS]]
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// CHECK: [[FUNC:%.*]] = function_ref @$s18reference_bindings11doSomethingyyF : $@convention(thin) () -> ()
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// CHECK: apply [[FUNC]]()
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// CHECK: destroy_value [[UNRESOLVED_BINDING]]
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// CHECK: destroy_value [[BOX]]
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// CHECK: } // end sil function '$s18reference_bindings13testBindToVaryyF'
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// SIL: sil hidden @$s18reference_bindings13testBindToVaryyF : $@convention(thin) () -> () {
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// SIL: bb0:
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// SIL: [[BOX:%.*]] = alloc_stack [var_decl] $Int, var, name "x"
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// SIL: [[INOUT_BOX:%.*]] = alloc_stack [var_decl] $Int, var, name "x2"
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// SIL: [[ACCESS:%.*]] = begin_access [modify] [static] [[BOX]]
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// SIL: copy_addr [take] [[ACCESS]] to [init] [[INOUT_BOX]]
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// SIL: [[FUNC:%.*]] = function_ref @$s18reference_bindings11doSomethingyyF : $@convention(thin) () -> ()
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// SIL: apply [[FUNC]]()
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// SIL: copy_addr [take] [[INOUT_BOX]] to [init] [[ACCESS]]
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// SIL: end_access [[ACCESS]]
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// SIL: } // end sil function '$s18reference_bindings13testBindToVaryyF'
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func testBindToVar() {
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var x = 5
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inout x2 = x
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doSomething()
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}
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// CHECK-LABEL: sil hidden [ossa] @$s18reference_bindings15testBindToInOutyySSzF : $@convention(thin) (@inout String) -> () {
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// CHECK: bb0([[ARG:%.*]] : $*String):
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// CHECK: [[BOX:%.*]] = alloc_box ${ var String }
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// CHECK: [[MARK:%.*]] = mark_unresolved_reference_binding [inout] [[BOX]]
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// CHECK: [[LIFETIME:%.*]] = begin_borrow [var_decl] [[MARK]]
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// CHECK: [[PROJECT:%.*]] = project_box [[LIFETIME]]
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// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ARG]]
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// CHECK: copy_addr [[ACCESS]] to [init] [[PROJECT]]
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// CHECK: end_access [[ACCESS]]
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// CHECK: apply {{%.*}}()
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// CHECK: destroy_value [[MARK]]
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// CHECK: } // end sil function '$s18reference_bindings15testBindToInOutyySSzF'
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// SIL-LABEL: sil hidden @$s18reference_bindings15testBindToInOutyySSzF : $@convention(thin) (@inout String) -> () {
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// SIL: bb0([[ARG:%.*]] : $*String):
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// SIL: [[STACK:%.*]] = alloc_stack [var_decl] $String
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// SIL: [[ACCESS:%.*]] = begin_access [modify] [static] [[ARG]]
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// SIL: copy_addr [take] [[ACCESS]] to [init] [[STACK]]
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// SIL: apply {{%.*}}
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// SIL: copy_addr [take] [[STACK]] to [init] [[ACCESS]]
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// SIL: end_access [[ACCESS]]
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// SIL: dealloc_stack [[STACK]]
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// SIL: } // end sil function '$s18reference_bindings15testBindToInOutyySSzF'
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func testBindToInOut(_ x: inout String) {
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inout y = x
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doSomething()
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}
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