On Tue, Nov 17, 2015 at 07:53:18PM -0500, Michael Meissner wrote: > Here is the temporary patch I'm using to get past rs6000.c. But I suspect the > TOC alignment should never be 256.
Yes, it should be. Recent GNU ld aligns .TOC. to a 256 byte boundary. I have this patch in my tree. diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c index abc8eaa..e3ec042 100644 --- a/gcc/config/rs6000/rs6000.c +++ b/gcc/config/rs6000/rs6000.c @@ -8059,12 +8059,17 @@ rs6000_cannot_force_const_mem (machine_mode mode ATTRIBUTE_UNUSED, rtx x) static bool use_toc_relative_ref (rtx sym, machine_mode mode) { + /* Silence complaint that the POWERPC64_TOC_POINTER_ALIGNMENT test + is always true. */ +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wtype-limits" return ((constant_pool_expr_p (sym) && ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (get_pool_constant (sym), get_pool_mode (sym))) || (TARGET_CMODEL == CMODEL_MEDIUM && SYMBOL_REF_LOCAL_P (sym) && GET_MODE_SIZE (mode) <= POWERPC64_TOC_POINTER_ALIGNMENT)); +#pragma GCC diagnostic pop } /* Our implementation of LEGITIMIZE_RELOAD_ADDRESS. Returns a value to -- Alan Modra Australia Development Lab, IBM