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Temporary's destructor not called when exception thrown in a called function when compiled with -O2 #14595

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llvmbot opened this issue Oct 31, 2012 · 1 comment
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Temporary's destructor not called when exception thrown in a called function when compiled with -O2 #14595

llvmbot opened this issue Oct 31, 2012 · 1 comment
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bugzilla Issues migrated from bugzilla clang:codegen

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@llvmbot
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llvmbot commented Oct 31, 2012

Bugzilla Link 14223
Resolution FIXED
Resolved on Apr 07, 2014 07:32
Version trunk
OS Linux
Attachments Test for destructors on temporaries in the presence of exceptions
Reporter LLVM Bugzilla Contributor
CC @efriedma-quic,@hfinkel,@isanbard

Extended Description

Attached is a slimmed down case from a production code, where the presence of an 'if' statement in a function that passes through an exception will not have the destructors of its temporary variables called.

Note that this only happens when compiling with -O2. Any other optimization level, including -O3 will give the correct result.

To reproduce:

clang++ -O2 -o t test.cc
./t

Expected output:

AutoDestroy
~AutoDestroy
Exception: No pointer

Actual output:

AutoDestroy
Exception: No pointer

clang --version
clang version 3.2 (trunk 166893)
Target: x86_64-unknown-linux-gnu
Thread model: posix
@llvmbot
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llvmbot commented Apr 7, 2014

This looks fixed in the latest trunk.

clang version 3.5.0 (205671)
Target: x86_64-unknown-linux-gnu
Thread model: posix

@llvmbot llvmbot transferred this issue from llvm/llvm-bugzilla-archive Dec 3, 2021
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