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5c0ae940eb
This comes up in the code for constructing an empty string literal. With this optimization it's possible to statically initialize empty string global variables.
37 lines
1.6 KiB
Plaintext
37 lines
1.6 KiB
Plaintext
// RUN: %target-sil-opt -enable-sil-verify-all %s -onone-simplification -simplify-instruction=value_to_bridge_object | %FileCheck %s
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// REQUIRES: swift_in_compiler
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import Swift
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import Builtin
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// CHECK-LABEL: sil @empty_string_literal_sequence
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// CHECK: %1 = value_to_bridge_object %0
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// CHECK: return %1
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// CHECK: } // end sil function 'empty_string_literal_sequence'
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sil @empty_string_literal_sequence : $@convention(thin) (Builtin.Int64) -> Builtin.BridgeObject {
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bb0(%0 : $Builtin.Int64):
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%1 = value_to_bridge_object %0 : $Builtin.Int64
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%2 = unchecked_trivial_bit_cast %1 : $Builtin.BridgeObject to $UInt64
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%3 = struct_extract %2 : $UInt64, #UInt64._value
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%4 = value_to_bridge_object %3 : $Builtin.Int64
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return %4 : $Builtin.BridgeObject
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}
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// CHECK-LABEL: sil [ossa] @keep_both_vtbo_instructions
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// CHECK: %1 = value_to_bridge_object %0
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// CHECK: %2 = value_to_bridge_object %0
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// CHECK: %3 = tuple (%1 : $Builtin.BridgeObject, %2 : $Builtin.BridgeObject)
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// CHECK: return %3
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// CHECK: } // end sil function 'keep_both_vtbo_instructions'
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sil [ossa] @keep_both_vtbo_instructions : $@convention(thin) (Builtin.Int64) -> (Builtin.BridgeObject, Builtin.BridgeObject) {
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bb0(%0 : $Builtin.Int64):
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%1 = value_to_bridge_object %0 : $Builtin.Int64
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%2 = unchecked_trivial_bit_cast %1 : $Builtin.BridgeObject to $UInt64
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%3 = struct_extract %2 : $UInt64, #UInt64._value
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%4 = value_to_bridge_object %3 : $Builtin.Int64
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%5 = tuple (%1 : $Builtin.BridgeObject, %4 : $Builtin.BridgeObject)
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return %5 : $(Builtin.BridgeObject, Builtin.BridgeObject)
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}
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