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# 7538b35c 05-Jul-2017 Erich Keane <[email protected]>

Address comments that escaped D33333

Patch By: Jen Yu

Differential Revision:https://reviews.llvm.org/D34671

llvm-svn: 307172
# 89fe9c26 23-Jun-2017 Erich Keane <[email protected]>

Emit warning when throw exception in destruct or dealloc functions which has a
(possible implicit) noexcept specifier

Throwing in the destructor is not good (C++11 change try to not allow see below

Emit warning when throw exception in destruct or dealloc functions which has a
(possible implicit) noexcept specifier

Throwing in the destructor is not good (C++11 change try to not allow see below).
But in reality, those codes are exist.
C++11 [class.dtor]p3:

A declaration of a destructor that does not have an exception-specification is
implicitly considered to have the same exception specification as an implicit
declaration.

With this change, the application worked before may now run into runtime
termination. My goal here is to emit a warning to provide only possible info to
where the code may need to be changed.

First there is no way, in compile time to identify the “throw” really throw out
of the function. Things like the call which throw out… To keep this simple,
when “throw” is seen, checking its enclosing function(only destructor and
dealloc functions) with noexcept(true) specifier emit warning.

Here is implementation detail:
A new member function CheckCXXThrowInNonThrowingFunc is added for class Sema
in Sema.h. It is used in the call to both BuildCXXThrow and
TransformCXXThrowExpr.

The function basic check if the enclosing function with non-throwing noexcept
specifer, if so emit warning for it.

The example of warning message like:
k1.cpp:18:3: warning: ''~dependent_warn'' has a (possible implicit) non-throwing

noexcept specifier. Throwing exception may cause termination.
[-Wthrow-in-dtor]
throw 1;
^

k1.cpp:43:30: note: in instantiation of member function

'dependent_warn<noexcept_fun>::~dependent_warn' requested here

dependent_warn<noexcept_fun> f; // cause warning

Differential Revision: https://reviews.llvm.org/D33333

llvm-svn: 306149

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Revision tags: llvmorg-4.0.1, llvmorg-4.0.1-rc3, llvmorg-4.0.1-rc2, llvmorg-4.0.1-rc1, llvmorg-4.0.0, llvmorg-4.0.0-rc4, llvmorg-4.0.0-rc3, llvmorg-4.0.0-rc2, llvmorg-4.0.0-rc1, llvmorg-3.9.1, llvmorg-3.9.1-rc3, llvmorg-3.9.1-rc2, llvmorg-3.9.1-rc1, llvmorg-3.9.0, llvmorg-3.9.0-rc3, llvmorg-3.9.0-rc2, llvmorg-3.9.0-rc1, llvmorg-3.8.1, llvmorg-3.8.1-rc1, llvmorg-3.8.0, llvmorg-3.8.0-rc3, llvmorg-3.8.0-rc2, llvmorg-3.8.0-rc1, llvmorg-3.7.1, llvmorg-3.7.1-rc2, llvmorg-3.7.1-rc1, llvmorg-3.7.0, llvmorg-3.7.0-rc4, llvmorg-3.7.0-rc3, llvmorg-3.7.0-rc2, llvmorg-3.7.0-rc1, llvmorg-3.6.2, llvmorg-3.6.2-rc1, llvmorg-3.6.1, llvmorg-3.6.1-rc1, llvmorg-3.5.2, llvmorg-3.5.2-rc1, llvmorg-3.6.0, llvmorg-3.6.0-rc4, llvmorg-3.6.0-rc3, llvmorg-3.6.0-rc2, llvmorg-3.6.0-rc1, llvmorg-3.5.1, llvmorg-3.5.1-rc2, llvmorg-3.5.1-rc1, llvmorg-3.5.0, llvmorg-3.5.0-rc4, llvmorg-3.5.0-rc3, llvmorg-3.5.0-rc2, llvmorg-3.5.0-rc1
# c9e2a689 20-May-2014 Eric Christopher <[email protected]>

Clean up language and grammar.

Based on a patch by [email protected]!
PR19806

llvm-svn: 209215
Revision tags: llvmorg-3.4.2, llvmorg-3.4.2-rc1, llvmorg-3.4.1, llvmorg-3.4.1-rc2, llvmorg-3.4.1-rc1, llvmorg-3.4.0, llvmorg-3.4.0-rc3, llvmorg-3.4.0-rc2, llvmorg-3.4.0-rc1, llvmorg-3.3.1-rc1, llvmorg-3.3.0, llvmorg-3.3.0-rc3, llvmorg-3.3.0-rc2, llvmorg-3.3.0-rc1, llvmorg-3.2.0, llvmorg-3.2.0-rc3, llvmorg-3.2.0-rc2, llvmorg-3.2.0-rc1
# c6e68daa 19-Oct-2012 Andy Gibbs <[email protected]>

Prior to adding the new "expected-no-diagnostics" directive to VerifyDiagnosticConsumer, make the necessary adjustment to 580 test-cases which will henceforth require this new directive.

llvm-svn: 1

Prior to adding the new "expected-no-diagnostics" directive to VerifyDiagnosticConsumer, make the necessary adjustment to 580 test-cases which will henceforth require this new directive.

llvm-svn: 166280

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Revision tags: llvmorg-3.1.0, llvmorg-3.1.0-rc3, llvmorg-3.1.0-rc2, llvmorg-3.1.0-rc1, llvmorg-3.0.0, llvmorg-3.0.0-rc4, llvmorg-3.0.0-rc3, llvmorg-3.0.0-rc2, llvmorg-3.0.0-rc1
# 9ca5c425 13-Oct-2011 Richard Smith <[email protected]>

Update all tests other than Driver/std.cpp to use -std=c++11 rather than
-std=c++0x. Patch by Ahmed Charles!

llvm-svn: 141900
Revision tags: llvmorg-2.9.0, llvmorg-2.9.0-rc3, llvmorg-2.9.0-rc2
# 849385bf 14-Mar-2011 Sebastian Redl <[email protected]>

Add another, pretty trivial, exception spec test case.

llvm-svn: 127602