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Jules Villard 8715c4f892 [clang] make switch statement translation more robust ... Summary: Labels inside switch statements were causing havoc (see test), and the translation of switch statements in general could be improved to handle more cases. It turns out that `case` (and `default`) statements are more or less fancy labels into the code. In other words, if you erase all the `case XXX:` and `default:` strings in the `switch` statement you get the real structure of the program, and `switch` just jumps straight to the first `case` directives (and to the second if the first one is not satisfied, etc. until all `case`/`default` have been considered). This suggests an alternative implementation: translate the body of the `switch` and simply record the list of switch cases inside that body, along with where they point to. Then post-process this list to construct the control flow of the `switch`, which points into the control-flow of the `body`. In order not to modify every function in `CTrans` to propagate the current list of cases, I created an ugly `ref` inside `SwitchCase` instead (but it cannot be directly accessed and it's guaranteed to be well-parenthesised wrt nested switches by the `SwitchCase` API so it's not too bad). [unrelated] Also make translation failures output more information about what exactly in the source code is causing the crash, and the ancestors in the AST that lead to the crash site. Reviewed By: martinoluca Differential Revision: D8011046 fbshipit-source-id: 8455090		7 years ago
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break_scope.cpp	[destructors] Destroy fields after break.	7 years ago
break_scope.cpp.dot	[clang] make switch statement translation more robust	7 years ago
call_destructor.cpp	Translate destructor calls	9 years ago
call_destructor.cpp.dot	[clang] enforce that `instruction` always returns one SIL expression	7 years ago
call_on_delete.cpp	[clang-format] Reformat all c/cpp/objc sources with clang-format	9 years ago
call_on_delete.cpp.dot	[clang] enforce that `instruction` always returns one SIL expression	7 years ago
continue_scope.cpp	[destructors] Destroy fields after continue.	7 years ago
continue_scope.cpp.dot	[clang] enforce that `instruction` always returns one SIL expression	7 years ago
destructor_bases.cpp	[destructors] Injecting destructor calls of virtual bases inside destructor bodies	7 years ago
destructor_bases.cpp.dot	[clang] enforce that `instruction` always returns one SIL expression	7 years ago
pseudo_destructor_expr.cpp	Translate CXXPseudoDestructorExpr	9 years ago
pseudo_destructor_expr.cpp.dot	[clang] enforce that `instruction` always returns one SIL expression	7 years ago
scope.cpp	[destructors] Injecting destructors of fields to destructor bodies.	7 years ago
scope.cpp.dot	[clang] enforce that `instruction` always returns one SIL expression	7 years ago
simple_decl.cpp	[clang-format] Reformat all c/cpp/objc sources with clang-format	9 years ago
simple_decl.cpp.dot	[clang] enforce that `instruction` always returns one SIL expression	7 years ago