Differential Emitter Variable and Struct Support #1
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To display a failure message in the debugger, create a function in the debug info which has the name of the failure message. The debug location of the trap/cond_fail is then wrapped into this function and the function is declared as "inlined". In case the debugger stops at the trap instruction, it displays the inline function, which looks like the failure message. For example: * thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0) frame #0: 0x0000000100000cbf a.out`testit3(_:) [inlined] Unexpectedly found nil while unwrapping an Optional value at test.swift:14:11 [opt] 11 12 @inline(never) 13 func testit(_ a: Int?) -> Int { -> 14 return a! 15 } 16 This change is currently not enabled by default, but can be enabled with the option "-Xllvm -enable-trap-debug-info". Enabling this feature needs some changes in lldb. When the lldb part is done, this option can be removed and the feature enabled by default.
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To display a failure message in the debugger, create a function in the debug info which has the name of the failure message. The debug location of the trap/cond_fail is then wrapped into this function and the function is declared as "inlined". In case the debugger stops at the trap instruction, it displays the inline function, which looks like the failure message. For example: * thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0) frame #0: 0x0000000100000cbf a.out`testit3(_:) [inlined] Unexpectedly found nil while unwrapping an Optional value at test.swift:14:11 [opt] 11 12 @inline(never) 13 func testit(_ a: Int?) -> Int { -> 14 return a! 15 } 16 This change is currently not enabled by default, but can be enabled with the option "-Xllvm -enable-trap-debug-info". Enabling this feature needs some changes in lldb. When the lldb part is done, this option can be removed and the feature enabled by default.
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Temporary PR while
differentiable-emitterbranch is merged upstream inapple/swift