diff options
Diffstat (limited to 'gcc/config/darwin.c')
| -rw-r--r-- | gcc/config/darwin.c | 48 |
1 files changed, 46 insertions, 2 deletions
diff --git a/gcc/config/darwin.c b/gcc/config/darwin.c index 79b42725f48..e8da4f1e699 100644 --- a/gcc/config/darwin.c +++ b/gcc/config/darwin.c @@ -1233,12 +1233,22 @@ machopic_select_section (tree decl, && DECL_WEAK (decl) && !lookup_attribute ("weak_import", DECL_ATTRIBUTES (decl))); - section *base_section; + section *base_section = NULL; switch (categorize_decl_for_section (decl, reloc)) { case SECCAT_TEXT: - base_section = darwin_text_section (reloc, weak); + { + struct cgraph_node *node; + if (decl && TREE_CODE (decl) == FUNCTION_DECL + && (node = cgraph_get_node (decl)) != NULL) + base_section = darwin_function_section (decl, + node->frequency, + node->only_called_at_startup, + node->only_called_at_exit); + if (!base_section) + base_section = darwin_text_section (reloc, weak); + } break; case SECCAT_RODATA: @@ -2362,4 +2372,38 @@ darwin_enter_string_into_cfstring_table (tree str) } } +/* Choose named function section based on its frequency. */ + +section * +darwin_function_section (tree decl, enum node_frequency freq, + bool startup, bool exit) +{ + /* Startup code should go to startup subsection unless it is + unlikely executed (this happens especially with function splitting + where we can split away unnecesary parts of static constructors. */ + if (startup && freq != NODE_FREQUENCY_UNLIKELY_EXECUTED) + return get_named_text_section + (decl, "__TEXT,__startup,regular,pure_instructions", "_startup"); + + /* Similarly for exit. */ + if (exit && freq != NODE_FREQUENCY_UNLIKELY_EXECUTED) + return get_named_text_section (decl, + "__TEXT,__exit,regular,pure_instructions", + "_exit"); + + /* Group cold functions together, similarly for hot code. */ + switch (freq) + { + case NODE_FREQUENCY_UNLIKELY_EXECUTED: + return get_named_text_section + (decl, + "__TEXT,__unlikely,regular,pure_instructions", "_unlikely"); + case NODE_FREQUENCY_HOT: + return get_named_text_section + (decl, "__TEXT,__hot,regular,pure_instructions", "_hot"); + default: + return NULL; + } +} + #include "gt-darwin.h" |