diff options
Diffstat (limited to 'gcc/varasm.c')
| -rw-r--r-- | gcc/varasm.c | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/gcc/varasm.c b/gcc/varasm.c index 7f5ee565f51..5257810f6b6 100644 --- a/gcc/varasm.c +++ b/gcc/varasm.c @@ -137,6 +137,9 @@ static HOST_WIDE_INT const_alias_set; static const char *strip_reg_name (const char *); static int contains_pointers_p (tree); +#ifdef ASM_OUTPUT_EXTERNAL +static bool incorporeal_function_p (tree); +#endif static void decode_addr_const (tree, struct addr_const *); static hashval_t const_desc_hash (const void *); static int const_desc_eq (const void *, const void *); @@ -1599,6 +1602,29 @@ contains_pointers_p (tree type) } } +#ifdef ASM_OUTPUT_EXTERNAL +/* True if DECL is a function decl for which no out-of-line copy exists. + It is assumed that DECL's assembler name has been set. */ + +static bool +incorporeal_function_p (tree decl) +{ + if (TREE_CODE (decl) == FUNCTION_DECL && DECL_BUILT_IN (decl)) + { + const char *name; + + if (DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL + && DECL_FUNCTION_CODE (decl) == BUILT_IN_ALLOCA) + return true; + + name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); + if (strncmp (name, "__builtin_", strlen ("__builtin_")) == 0) + return true; + } + return false; +} +#endif + /* Output something to declare an external symbol to the assembler. (Most assemblers don't need this, so we normally output nothing.) Do nothing if DECL is not external. */ @@ -1619,7 +1645,8 @@ assemble_external (tree decl ATTRIBUTE_UNUSED) rtx rtl = DECL_RTL (decl); if (GET_CODE (rtl) == MEM && GET_CODE (XEXP (rtl, 0)) == SYMBOL_REF - && ! SYMBOL_REF_USED (XEXP (rtl, 0))) + && !SYMBOL_REF_USED (XEXP (rtl, 0)) + && !incorporeal_function_p (decl)) { /* Some systems do require some output. */ SYMBOL_REF_USED (XEXP (rtl, 0)) = 1; |