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9a8f2ed642
SROA and Mem2Reg now can leverage DIExpression -- op_fragment, more specifically -- to generate correct debug info for optimized SIL. Some important highlights: - The new swift::salvageDebugInfo, similar to llvm::salvageDebugInfo, tries to restore / transfer debug info from a deleted instruction. Currently I only implemented this for store instruction whose destination is an alloc_stack value. - Since we now have source-variable-specific SIL location inside a `debug_value` instruction (and its friends), this patch teaches SILCloner and SILInliner to remap the debug scope there in addition to debug scope of the instruction. - DCE now does not remove `debug_value` instruction whose associating with a function argument SSA value that is not used elsewhere. Since that SSA value will not disappear so we should keep the debug info.
28 lines
833 B
Swift
28 lines
833 B
Swift
// RUN: %target-swift-frontend -O -module-name=test -emit-sil -primary-file %s | %FileCheck %s
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protocol P { associatedtype A = Int }
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protocol Q : P {}
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protocol B { var x: Int { get } }
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struct Y<T> {}
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extension Y : B where T : Q { var x: Int { 0 }}
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extension P {
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var z: Int? { (Y<Self>() as? B)?.x }
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}
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struct X : Q {
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// Check that this getter can be folded to a simple "return 0"
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// CHECK-LABEL: sil hidden @$s4test1XV0A2MeSiSgvg : $@convention(method) (X) -> Optional<Int> {
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// CHECK: bb0(%0 : $X):
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// CHECK-NEXT: debug_value
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// CHECK-NEXT: integer_literal ${{.*}}, 0
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// CHECK-NEXT: struct $Int
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// CHECK-NEXT: %[[ENUM:[0-9]+]] = enum $Optional<Int>, #Optional.some!enumelt
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// CHECK-NEXT: return %[[ENUM]] : $Optional<Int>
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// CHECK-NEXT: } // end sil function '$s4test1XV0A2MeSiSgvg'
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var testMe: Int? { z }
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}
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