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71 lines
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71 lines
3.2 KiB
HTML
4 years ago
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<title>Miscellaneous Register Hooks - GNU Compiler Collection (GCC) Internals</title>
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<link rel="prev" href="Stack-Smashing-Protection.html#Stack-Smashing-Protection" title="Stack Smashing Protection">
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<div class="node">
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<a name="Miscellaneous-Register-Hooks"></a>
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<p>
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Previous: <a rel="previous" accesskey="p" href="Stack-Smashing-Protection.html#Stack-Smashing-Protection">Stack Smashing Protection</a>,
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Up: <a rel="up" accesskey="u" href="Stack-and-Calling.html#Stack-and-Calling">Stack and Calling</a>
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<hr>
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</div>
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<h4 class="subsection">17.9.15 Miscellaneous register hooks</h4>
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<p><a name="index-miscellaneous-register-hooks-4325"></a>
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<div class="defun">
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— Target Hook: bool <b>TARGET_CALL_FUSAGE_CONTAINS_NON_CALLEE_CLOBBERS</b><var><a name="index-TARGET_005fCALL_005fFUSAGE_005fCONTAINS_005fNON_005fCALLEE_005fCLOBBERS-4326"></a></var><br>
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<blockquote><p>Set to true if each call that binds to a local definition explicitly
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clobbers or sets all non-fixed registers modified by performing the call.
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That is, by the call pattern itself, or by code that might be inserted by the
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linker (e.g. stubs, veneers, branch islands), but not including those
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modifiable by the callee. The affected registers may be mentioned explicitly
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in the call pattern, or included as clobbers in CALL_INSN_FUNCTION_USAGE.
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The default version of this hook is set to false. The purpose of this hook
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is to enable the fipa-ra optimization.
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</p></blockquote></div>
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