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Kevin F. Quinn <kevquinn@gentoo.org> |
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Kevin F. Quinn <kevquinn@gentoo.org> |
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* builtins.c (expand_builtin_init_trampoline): If |
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* builtins.c (expand_builtin_init_trampoline): If |
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-Wtrampolines make a warning. |
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-Wtrampolines make a warning. |
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* common.opt: Add -Wtrampolines. |
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* common.opt: Add -Wtrampolines. |
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* doc/invoke.texi: Add -Wtrampolines. |
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* doc/invoke.texi: Add -Wtrampolines. |
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#328451 set -Wtrampolines as default |
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#328451 set -Wtrampolines as default |
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-- a/gcc/builtins.c |
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++ b/gcc/builtins.c |
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Lines 5155-5160
expand_builtin_init_trampoline (tree exp)
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targetm.calls.trampoline_init (m_tramp, t_func, r_chain); |
5155 |
targetm.calls.trampoline_init (m_tramp, t_func, r_chain); |
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5156 |
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trampolines_created = 1; |
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trampolines_created = 1; |
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5158 |
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warning_at (DECL_SOURCE_LOCATION (t_func), OPT_Wtrampolines, |
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"trampoline generated for nested function %qD", t_func); |
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return const0_rtx; |
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return const0_rtx; |
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} |
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} |
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5164 |
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-- a/gcc/common.opt |
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++ b/gcc/common.opt |
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Lines 192-197
Wsystem-headers
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Common Var(warn_system_headers) Warning |
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Common Var(warn_system_headers) Warning |
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Do not suppress warnings from system headers |
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Do not suppress warnings from system headers |
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Wtrampolines |
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Common Var(warn_trampolines) Init(1) Warning |
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Warn whenever a trampoline is generated |
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Wtype-limits |
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Wtype-limits |
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Common Var(warn_type_limits) Init(-1) Warning |
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Common Var(warn_type_limits) Init(-1) Warning |
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Warn if a comparison is always true or always false due to the limited range of the data type |
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Warn if a comparison is always true or always false due to the limited range of the data type |
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-- a/gcc/doc/invoke.texi |
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++ b/gcc/doc/invoke.texi |
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Lines 3611-3616
code. However, note that using @option{-Wall} in conjunction with this
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option will @emph{not} warn about unknown pragmas in system |
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option will @emph{not} warn about unknown pragmas in system |
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headers---for that, @option{-Wunknown-pragmas} must also be used. |
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headers---for that, @option{-Wunknown-pragmas} must also be used. |
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3613 |
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3614 |
@item -Wtrampolines |
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@opindex Wtrampolines |
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@opindex Wno-trampolines |
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Warn about trampolines generated for pointers to nested functions. |
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NOTE: In Gentoo, @option{-Wtrampolines} is set by default. |
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To disable, specify @option{-Wno-trampolines} |
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A trampoline is a small piece of data or code that is created at run |
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time on the stack when the address of a nested function is taken, and |
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is used to call the nested function indirectly. For some targets, it |
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is made up of data only and thus requires no special treatment. But, |
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for most targets, it is made up of code and thus requires the stack |
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to be made executable in order for the program to work properly. |
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@item -Wfloat-equal |
3629 |
@item -Wfloat-equal |
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@opindex Wfloat-equal |
3630 |
@opindex Wfloat-equal |
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@opindex Wno-float-equal |
3631 |
@opindex Wno-float-equal |
