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https://issues.apache.org/jira/browse/STDCXX-424?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12582008#action_12582008
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Martin Sebor commented on STDCXX-424:
-------------------------------------
gcc 4.1 does a much better job of inlining the functions, although it still
calls, perhaps unavoidably, {{operator delete()}}:
{noformat}
.file "t.cpp"
.text
.align 2
.p2align 4,,15
.globl main
.type main, @function
main:
subq $8, %rsp
xorl %edi, %edi
call operator delete(void*)
xorl %edi, %edi
call operator delete(void*)
xorl %eax, %eax
addq $8, %rsp
ret
.size main, .-main
.ident "GCC: (GNU) 4.1.2 20070925 (Red Hat 4.1.2-33)"
.section .note.GNU-stack,"",@progbits
{noformat}
> [gcc 3.3.3] warning: inlining failed in call to std::valarray copy ctor
> -----------------------------------------------------------------------
>
> Key: STDCXX-424
> URL: https://issues.apache.org/jira/browse/STDCXX-424
> Project: C++ Standard Library
> Issue Type: Bug
> Components: 26. Numerics
> Affects Versions: 4.1.3, 4.1.4
> Environment: gcc 3.3.3 on Linux
> Reporter: Martin Sebor
> Assignee: Martin Sebor
> Priority: Minor
> Fix For: 4.2.1
>
> Original Estimate: 4h
> Remaining Estimate: 4h
>
> We're getting lots of warnings like the ones below from valarray tests. Even
> four levels of inlining in user code (not at all uncommon) triggers the
> noise...
> $ cat t.cpp && make t
> #include <valarray>
> inline void f0 (std::valarray<int>) { }
> inline void f1 (std::valarray<int> va) { f0 (va); }
> inline void f2 (std::valarray<int> va) { f1 (va); }
> inline void f3 (std::valarray<int> va) { f2 (va); }
> inline void f4 (std::valarray<int> va) { f3 (va); }
> int main ()
> {
> f4 (std::valarray<int>());
> }
> gcc -c -I/amd/devco/sebor/stdcxx/include/ansi -pthread
> -I/amd/devco/sebor/stdcxx/include
> -I/build/sebor/stdcxx-gcc-3.3.3_43.41-12d/include
> -I/amd/devco/sebor/stdcxx/examples/include -pedantic -nostdinc++ -O2 -m32
> -W -Wall -Wcast-qual -Winline -Wshadow -Wwrite-strings -Wno-long-long
> -Wcast-align t.cpp
> gcc t.o -o t -pthread -m32 -L/build/sebor/stdcxx-gcc-3.3.3_43.41-12d/lib
> -Wl,-R/build/sebor/stdcxx-gcc-3.3.3_43.41-12d/lib -lstd12d -lsupc++ -lm
> In file included from /amd/devco/sebor/stdcxx/include/rw/_array.h:7:
> t.cpp: In function `int main()':
> /amd/devco/sebor/stdcxx/include/valarray:93: warning: inlining failed in call
> to `std::valarray<_TypeT>::valarray(const std::valarray<_TypeT>&) [with
> _TypeT = int]'
> t.cpp:6: warning: called from here
> In file included from /amd/devco/sebor/stdcxx/include/rw/_array.h:6:
> /amd/devco/sebor/stdcxx/include/valarray:93: warning: inlining failed in call
> to `std::valarray<_TypeT>::valarray(const std::valarray<_TypeT>&) [with
> _TypeT = int]'
> t.cpp:5: warning: called from here
> In file included from /amd/devco/sebor/stdcxx/include/rw/_array.h:5:
> /amd/devco/sebor/stdcxx/include/valarray:93: warning: inlining failed in call
> to `std::valarray<_TypeT>::valarray(const std::valarray<_TypeT>&) [with
> _TypeT = int]'
> t.cpp:4: warning: called from here
> In file included from /amd/devco/sebor/stdcxx/include/rw/_array.h:4:
> /amd/devco/sebor/stdcxx/include/valarray:93: warning: inlining failed in call
> to `std::valarray<_TypeT>::valarray(const std::valarray<_TypeT>&) [with
> _TypeT = int]'
> t.cpp:3: warning: called from here
> In file included from t.cpp:7,
> from t.cpp:11:
> /amd/devco/sebor/stdcxx/include/valarray:93: warning: inlining failed in call
> to `std::valarray<_TypeT>::valarray(const std::valarray<_TypeT>&) [with
> _TypeT = int]'
> t.cpp:6: warning: called from here
> In file included from t.cpp:6,
> from t.cpp:7,
> from t.cpp:11:
> /amd/devco/sebor/stdcxx/include/valarray:93: warning: inlining failed in call
> to `std::valarray<_TypeT>::valarray(const std::valarray<_TypeT>&) [with
> _TypeT = int]'
> t.cpp:5: warning: called from here
> In file included from t.cpp:5,
> from t.cpp:6,
> from t.cpp:7,
> from t.cpp:11:
> /amd/devco/sebor/stdcxx/include/valarray:93: warning: inlining failed in call
> to `std::valarray<_TypeT>::valarray(const std::valarray<_TypeT>&) [with
> _TypeT = int]'
> t.cpp:4: warning: called from here
> In file included from t.cpp:4,
> from t.cpp:5,
> from t.cpp:6,
> from t.cpp:7,
> from t.cpp:11:
> /amd/devco/sebor/stdcxx/include/valarray:93: warning: inlining failed in call
> to `std::valarray<_TypeT>::valarray(const std::valarray<_TypeT>&) [with
> _TypeT = int]'
> t.cpp:3: warning: called from here
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