2004-01-11 Richard Sandiford <rsandifo@redhat.com>
+ * config/mips/mips.c (mips_symbolic_constant_p): Don't allow
+ out-of-bounds accesses to string constants. Simplify mips16
+ case accordingly.
+
+2004-01-11 Richard Sandiford <rsandifo@redhat.com>
+
PR optimization/13469
* toplev.c (rest_of_compilation): Call purge_all_dead_edges after
reload_cse_regs (-fnon-call-exceptions only).
if (offset == 0)
return true;
+ /* If X refers to a string constant, and that constant is put into a
+ mergeable section, the linker will need to know which string is
+ being accessed. It has no way of distinguishing an out-of-bounds
+ access to X from an in-bounds access to a later or earlier string. */
+ if (GET_CODE (x) == SYMBOL_REF
+ && SYMBOL_REF_DECL (x) != 0
+ && TREE_CODE (SYMBOL_REF_DECL (x)) == STRING_CST
+ && !(offset > 0 && offset < TREE_STRING_LENGTH (SYMBOL_REF_DECL (x))))
+ return false;
+
/* Check whether a nonzero offset is valid for the underlying
relocations. */
switch (*symbol_type)
return (offset > 0 && offset < mips_section_threshold);
case SYMBOL_CONSTANT_POOL:
- /* Similarly check the range of offsets for mips16 constant
- pool entries. */
- return (CONSTANT_POOL_ADDRESS_P (x)
- && offset > 0
- && offset < (int) GET_MODE_SIZE (get_pool_mode (x)));
+ /* We don't generate out-of-bounds accesses to normal constant
+ pool entries. String constants were handled above. */
+ return true;
case SYMBOL_GOT_LOCAL:
case SYMBOL_GOTOFF_PAGE: