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[Test] Added tests showing extra copies.
As a separate commit to make the behavior change more obvious.
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‎test/SILOptimizer/temp_rvalue_opt_ossa.sil

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Original file line numberDiff line numberDiff line change
@@ -39,6 +39,9 @@ public enum FakeOptional<T> {
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case some(T)
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}
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sil [ossa] @getKlass : $@convention(thin) () -> @owned Klass
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sil @unknown : $@convention(thin) () -> ()
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sil [ossa] @guaranteed_user : $@convention(thin) (@guaranteed Klass) -> ()
@@ -1506,6 +1509,122 @@ bb2:
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unwind
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}
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// CHECK-LABEL: sil [ossa] @take_from_original_copy_addr__final_use_load_take : {{.*}} {
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// CHECK: [[GET:%[^,]+]] = function_ref @getKlass
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// CHECK: [[USER:%[^,]+]] = function_ref @inguaranteed_user_without_result
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// CHECK: [[INSTANCE_1:%[^,]+]] = apply [[GET]]()
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// CHECK: [[ADDR:%[^,]+]] = alloc_stack $Klass
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// CHECK: store [[INSTANCE_1]] to [init] [[ADDR]]
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// CHECK: apply [[USER]]([[ADDR]])
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// CHECK: [[INSTANCE_2:%[^,]+]] = load [copy] [[ADDR]]
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// Extra copy: ^^^^^^^^^^^
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// CHECK: destroy_addr [[ADDR]]
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// CHECK: dealloc_stack [[ADDR]]
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// CHECK: return [[INSTANCE_2]]
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// CHECK-LABEL: } // end sil function 'take_from_original_copy_addr__final_use_load_take'
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sil [ossa] @take_from_original_copy_addr__final_use_load_take : $() -> @owned Klass {
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%getKlass = function_ref @getKlass : $@convention(thin) () -> @owned Klass
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%user = function_ref @inguaranteed_user_without_result : $@convention(thin) (@in_guaranteed Klass) -> ()
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%instance_1 = apply %getKlass() : $@convention(thin) () -> @owned Klass
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%src = alloc_stack $Klass
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store %instance_1 to [init] %src : $*Klass
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apply %user(%src) : $@convention(thin) (@in_guaranteed Klass) -> ()
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%tmp = alloc_stack $Klass
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copy_addr [take] %src to [init] %tmp : $*Klass
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%instance_2 = load [take] %tmp : $*Klass
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dealloc_stack %tmp : $*Klass
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dealloc_stack %src : $*Klass
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return %instance_2 : $Klass
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}
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// CHECK-LABEL: sil [ossa] @take_from_original_copy_addr__final_use_copy_addr_take : {{.*}} {
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// CHECK: {{bb[0-9]+}}([[OUT:%[^,]+]] :
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// CHECK: [[GET:%[^,]+]] = function_ref @getKlass
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// CHECK: [[USER:%[^,]+]] = function_ref @inguaranteed_user_without_result
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// CHECK: [[INSTANCE_1:%[^,]+]] = apply [[GET]]()
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// CHECK: [[SRC:%[^,]+]] = alloc_stack $Klass
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// CHECK: store [[INSTANCE_1]] to [init] [[SRC]]
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// CHECK: apply [[USER]]([[SRC]])
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// CHECK: copy_addr [[SRC]] to [init] [[OUT]]
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// Extra copy: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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// CHECK: destroy_addr [[SRC]]
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// CHECK: dealloc_stack [[SRC]]
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// CHECK-LABEL: } // end sil function 'take_from_original_copy_addr__final_use_copy_addr_take'
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sil [ossa] @take_from_original_copy_addr__final_use_copy_addr_take : $() -> @out Klass {
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entry(%out : $*Klass):
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%getKlass = function_ref @getKlass : $@convention(thin) () -> @owned Klass
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%user = function_ref @inguaranteed_user_without_result : $@convention(thin) (@in_guaranteed Klass) -> ()
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%instance_1 = apply %getKlass() : $@convention(thin) () -> @owned Klass
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%src = alloc_stack $Klass
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store %instance_1 to [init] %src : $*Klass
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apply %user(%src) : $@convention(thin) (@in_guaranteed Klass) -> ()
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%tmp = alloc_stack $Klass
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copy_addr [take] %src to [init] %tmp : $*Klass
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copy_addr [take] %tmp to [init] %out : $*Klass
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dealloc_stack %tmp : $*Klass
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dealloc_stack %src : $*Klass
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%retval = tuple ()
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return %retval : $()
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}
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// CHECK-LABEL: sil [ossa] @take_from_original_copy_addr__final_use_load_copy : {{.*}} {
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// CHECK: [[GET:%[^,]+]] = function_ref @getKlass
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// CHECK: [[USER:%[^,]+]] = function_ref @inguaranteed_user_without_result
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// CHECK: [[INSTANCE_1:%[^,]+]] = apply [[GET]]()
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// CHECK: [[SRC:%[^,]+]] = alloc_stack $Klass
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// CHECK: store [[INSTANCE_1]] to [init] [[SRC]]
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// CHECK: apply [[USER]]([[SRC]])
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// CHECK: [[INSTANCE_2:%[^,]+]] = load [copy] [[SRC]]
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// CHECK: destroy_addr [[SRC]]
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// CHECK: dealloc_stack [[SRC]]
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// CHECK: return [[INSTANCE_2]]
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// CHECK-LABEL: } // end sil function 'take_from_original_copy_addr__final_use_load_copy'
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sil [ossa] @take_from_original_copy_addr__final_use_load_copy : $() -> @owned Klass {
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%getKlass = function_ref @getKlass : $@convention(thin) () -> @owned Klass
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%user = function_ref @inguaranteed_user_without_result : $@convention(thin) (@in_guaranteed Klass) -> ()
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%instance_1 = apply %getKlass() : $@convention(thin) () -> @owned Klass
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%src = alloc_stack $Klass
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store %instance_1 to [init] %src : $*Klass
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apply %user(%src) : $@convention(thin) (@in_guaranteed Klass) -> ()
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%tmp = alloc_stack $Klass
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copy_addr [take] %src to [init] %tmp : $*Klass
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%instance_2 = load [copy] %tmp : $*Klass
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destroy_addr %tmp : $*Klass
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dealloc_stack %tmp : $*Klass
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dealloc_stack %src : $*Klass
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return %instance_2 : $Klass
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}
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// CHECK-LABEL: sil [ossa] @take_from_original_copy_addr__final_use_copy_addr_copy : {{.*}} {
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// CHECK: {{bb[0-9]+}}([[OUT:%[^,]+]] : $*Klass):
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// CHECK: [[GET:%[^,]+]] = function_ref @getKlass
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// CHECK: [[USER:%[^,]+]] = function_ref @inguaranteed_user_without_result
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// CHECK: [[INSTANCE:%[^,]+]] = apply [[GET]]()
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// CHECK: [[SRC:%[^,]+]] = alloc_stack $Klass
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// CHECK: store [[INSTANCE]] to [init] [[SRC]]
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// CHECK: apply [[USER]]([[SRC]])
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// CHECK: copy_addr [[SRC]] to [init] [[OUT]]
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// CHECK: destroy_addr [[SRC]]
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// CHECK: dealloc_stack [[SRC]]
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// CHECK-LABEL: } // end sil function 'take_from_original_copy_addr__final_use_copy_addr_copy'
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sil [ossa] @take_from_original_copy_addr__final_use_copy_addr_copy : $() -> @out Klass {
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entry(%out : $*Klass):
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%getKlass = function_ref @getKlass : $@convention(thin) () -> @owned Klass
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%user = function_ref @inguaranteed_user_without_result : $@convention(thin) (@in_guaranteed Klass) -> ()
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%instance_1 = apply %getKlass() : $@convention(thin) () -> @owned Klass
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%src = alloc_stack $Klass
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store %instance_1 to [init] %src : $*Klass
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apply %user(%src) : $@convention(thin) (@in_guaranteed Klass) -> ()
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%tmp = alloc_stack $Klass
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copy_addr [take] %src to [init] %tmp : $*Klass
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copy_addr %tmp to [init] %out : $*Klass
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destroy_addr %tmp : $*Klass
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dealloc_stack %tmp : $*Klass
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dealloc_stack %src : $*Klass
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%retval = tuple ()
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return %retval : $()
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}
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// This does not get optimized correctly because of the conservative treatment of load_borrow/end_borrow in MemBehavior
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// CHECK-LABEL: sil [ossa] @test_temprvoborrowboundary1 :
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// CHECK: copy_addr

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