Hi, This patch is under review for trunk GCC : https://gcc.gnu.org/ml/gcc-patches/2014-10/msg01638.html.
In the mean time, is this ok for google/gcc-4_9 branch? Without this, -mcmodel=medium is unusable if .lrodata goes beyond the 2G boundary. Thanks Sri
Index: testsuite/gcc.dg/pr63538.c =================================================================== --- testsuite/gcc.dg/pr63538.c (revision 0) +++ testsuite/gcc.dg/pr63538.c (revision 0) @@ -0,0 +1,14 @@ +/* PR63538 is about not using 64-bit addresses for .lrodata accesses when it + involves STRING_CSTs. */ +/* { dg-do compile { target x86_64-*-* } } */ +/* { dg-options "-O2 -mcmodel=medium -mlarge-data-threshold=0" { target x86_64-*-* } } */ + +#include <stdio.h> + +const char *str = "Hello World"; + +int main() { + printf("str = %p %s\n",str, str); + return 0; +} +/* { dg-final { scan-assembler-not "movl" } } */ Index: config/i386/i386.c =================================================================== --- config/i386/i386.c (revision 216287) +++ config/i386/i386.c (working copy) @@ -41331,8 +41331,7 @@ ix86_encode_section_info (tree decl, rtx rtl, int { default_encode_section_info (decl, rtl, first); - if (TREE_CODE (decl) == VAR_DECL - && (TREE_STATIC (decl) || DECL_EXTERNAL (decl)) + if ((TREE_STATIC (decl) || DECL_EXTERNAL (decl)) && ix86_in_large_data_p (decl)) SYMBOL_REF_FLAGS (XEXP (rtl, 0)) |= SYMBOL_FLAG_FAR_ADDR; }