diff options
Diffstat (limited to 'gcc/config/i386/i386.c')
| -rw-r--r-- | gcc/config/i386/i386.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index 02e678a..9c7b015 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -15120,6 +15120,19 @@ darwin_local_data_pic (rtx disp) && XINT (disp, 1) == UNSPEC_MACHOPIC_OFFSET); } +/* True if operand X should be loaded from GOT. */ + +bool +ix86_force_load_from_GOT_p (rtx x) +{ + return (TARGET_64BIT && !TARGET_PECOFF && !TARGET_MACHO + && !flag_plt && !flag_pic + && ix86_cmodel != CM_LARGE + && GET_CODE (x) == SYMBOL_REF + && SYMBOL_REF_FUNCTION_P (x) + && !SYMBOL_REF_LOCAL_P (x)); +} + /* Determine if a given RTX is a valid constant. We already know this satisfies CONSTANT_P. */ @@ -15188,6 +15201,12 @@ ix86_legitimate_constant_p (machine_mode mode, rtx x) if (MACHO_DYNAMIC_NO_PIC_P) return machopic_symbol_defined_p (x); #endif + + /* External function address should be loaded + via the GOT slot to avoid PLT. */ + if (ix86_force_load_from_GOT_p (x)) + return false; + break; CASE_CONST_SCALAR_INT: @@ -15596,6 +15615,9 @@ ix86_legitimate_address_p (machine_mode, rtx addr, bool strict) return false; case UNSPEC_GOTPCREL: + if (ix86_force_load_from_GOT_p (XVECEXP (XEXP (disp, 0), 0, 0))) + goto is_legitimate_pic; + /* FALLTHRU */ case UNSPEC_PCREL: gcc_assert (flag_pic); goto is_legitimate_pic; @@ -18169,6 +18191,12 @@ ix86_print_operand_address_as (FILE *file, rtx addr, fputs ("ds:", file); fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (disp)); } + /* Load the external function address via the GOT slot to avoid PLT. */ + else if (GET_CODE (disp) == CONST + && GET_CODE (XEXP (disp, 0)) == UNSPEC + && XINT (XEXP (disp, 0), 1) == UNSPEC_GOTPCREL + && ix86_force_load_from_GOT_p (XVECEXP (XEXP (disp, 0), 0, 0))) + output_pic_addr_const (file, disp, 0); else if (flag_pic) output_pic_addr_const (file, disp, 0); else @@ -19417,6 +19445,15 @@ ix86_expand_move (machine_mode mode, rtx operands[]) if (model) op1 = legitimize_tls_address (op1, model, true); + else if (ix86_force_load_from_GOT_p (op1)) + { + /* Load the external function address via GOT slot to avoid PLT. */ + op1 = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, op1), + UNSPEC_GOTPCREL); + op1 = gen_rtx_CONST (Pmode, op1); + op1 = gen_const_mem (Pmode, op1); + set_mem_alias_set (op1, ix86_GOT_alias_set ()); + } else { tmp = legitimize_pe_coff_symbol (op1, addend != NULL_RTX); |