+2011-11-16 Richard Henderson <rth@redhat.com>
+
+ * config/alpha/alpha.c (alpha_split_compare_and_swap_12): Copy
+ ALIAS_SET_MEMORY_BARRIER when creating a new memory.
+ (alpha_split_atomic_exchange_12): Likewise.
+ * config/rs6000/rs6000.c (rs6000_adjust_atomic_subword): Likewise.
+
2011-11-16 Joseph Myers <joseph@codesourcery.com>
* config/i386/i386elf.h (PREFERRED_DEBUGGING_TYPE): Remove.
mem = gen_rtx_MEM (DImode, align);
MEM_VOLATILE_P (mem) = MEM_VOLATILE_P (orig_mem);
+ if (MEM_ALIAS_SET (orig_mem) == ALIAS_SET_MEMORY_BARRIER)
+ set_mem_alias_set (mem, ALIAS_SET_MEMORY_BARRIER);
alpha_pre_atomic_barrier (mod_s);
mem = gen_rtx_MEM (DImode, align);
MEM_VOLATILE_P (mem) = MEM_VOLATILE_P (orig_mem);
+ if (MEM_ALIAS_SET (orig_mem) == ALIAS_SET_MEMORY_BARRIER)
+ set_mem_alias_set (mem, ALIAS_SET_MEMORY_BARRIER);
alpha_pre_atomic_barrier (model);
which to shift and mask. */
static rtx
-rs6000_adjust_atomic_subword (rtx mem, rtx *pshift, rtx *pmask)
+rs6000_adjust_atomic_subword (rtx orig_mem, rtx *pshift, rtx *pmask)
{
- rtx addr, align, shift, mask;
+ rtx addr, align, shift, mask, mem;
HOST_WIDE_INT shift_mask;
- enum machine_mode mode = GET_MODE (mem);
+ enum machine_mode mode = GET_MODE (orig_mem);
/* For smaller modes, we have to implement this via SImode. */
shift_mask = (mode == QImode ? 0x18 : 0x10);
- addr = XEXP (mem, 0);
+ addr = XEXP (orig_mem, 0);
addr = force_reg (GET_MODE (addr), addr);
/* Aligned memory containing subword. Generate a new memory. We
align = expand_simple_binop (Pmode, AND, addr, GEN_INT (-4),
NULL_RTX, 1, OPTAB_LIB_WIDEN);
mem = gen_rtx_MEM (SImode, align);
- MEM_VOLATILE_P (mem) = 1;
+ MEM_VOLATILE_P (mem) = MEM_VOLATILE_P (orig_mem);
+ if (MEM_ALIAS_SET (orig_mem) == ALIAS_SET_MEMORY_BARRIER)
+ set_mem_alias_set (mem, ALIAS_SET_MEMORY_BARRIER);
/* Shift amount for subword relative to aligned word. */
shift = gen_reg_rtx (SImode);