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gzip: Improve ptr_to_globals trick, allowing gcc
to optimize better. -480 bytes.
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1cc70225e7
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@ -2045,8 +2045,8 @@ int gzip_main(int argc, char **argv)
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}
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}
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#endif
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#endif
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ptr_to_globals = xzalloc(sizeof(struct globals) + sizeof(struct globals2));
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PTR_TO_GLOBALS = xzalloc(sizeof(struct globals) + sizeof(struct globals2))
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ptr_to_globals++;
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+ sizeof(struct globals);
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G2.l_desc.dyn_tree = G2.dyn_ltree;
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G2.l_desc.dyn_tree = G2.dyn_ltree;
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G2.l_desc.static_tree = G2.static_ltree;
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G2.l_desc.static_tree = G2.static_ltree;
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G2.l_desc.extra_bits = extra_lbits;
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G2.l_desc.extra_bits = extra_lbits;
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@ -804,7 +804,10 @@ extern char bb_common_bufsiz1[BUFSIZ+1];
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/* This struct is deliberately not defined. */
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/* This struct is deliberately not defined. */
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/* See docs/keep_data_small.txt */
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/* See docs/keep_data_small.txt */
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struct globals;
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struct globals;
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extern struct globals *ptr_to_globals;
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/* Magic prevents this from going into rodata */
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/* If you want to assign a value, use PTR_TO_GLOBALS = xxx */
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extern struct globals *const ptr_to_globals;
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#define PTR_TO_GLOBALS (*(struct globals**)&ptr_to_globals)
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/* You can change LIBBB_DEFAULT_LOGIN_SHELL, but don't use it,
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/* You can change LIBBB_DEFAULT_LOGIN_SHELL, but don't use it,
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* use bb_default_login_shell and following defines.
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* use bb_default_login_shell and following defines.
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@ -57,4 +57,5 @@ WTMP_FILE;
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char bb_common_bufsiz1[BUFSIZ+1];
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char bb_common_bufsiz1[BUFSIZ+1];
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struct globals;
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struct globals;
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struct globals *ptr_to_globals;
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/* Make it reside in R/W memory: */
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struct globals *const ptr_to_globals __attribute__ ((section (".data")));
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