diff options
Diffstat (limited to 'gcc/alias.c')
| -rw-r--r-- | gcc/alias.c | 39 |
1 files changed, 34 insertions, 5 deletions
diff --git a/gcc/alias.c b/gcc/alias.c index 69c8aa984c1..61ccc3db33e 100644 --- a/gcc/alias.c +++ b/gcc/alias.c @@ -2249,8 +2249,18 @@ true_dependence (const_rtx mem, enum machine_mode mem_mode, const_rtx x, if (mem_mode == VOIDmode) mem_mode = GET_MODE (mem); - x_addr = get_addr (XEXP (x, 0)); - mem_addr = get_addr (XEXP (mem, 0)); + x_addr = XEXP (x, 0); + mem_addr = XEXP (mem, 0); + if (!((GET_CODE (x_addr) == VALUE + && GET_CODE (mem_addr) != VALUE + && reg_mentioned_p (x_addr, mem_addr)) + || (GET_CODE (x_addr) != VALUE + && GET_CODE (mem_addr) == VALUE + && reg_mentioned_p (mem_addr, x_addr)))) + { + x_addr = get_addr (x_addr); + mem_addr = get_addr (mem_addr); + } base = find_base_term (x_addr); if (base && (GET_CODE (base) == LABEL_REF @@ -2328,7 +2338,16 @@ canon_true_dependence (const_rtx mem, enum machine_mode mem_mode, rtx mem_addr, return 1; if (! x_addr) - x_addr = get_addr (XEXP (x, 0)); + { + x_addr = XEXP (x, 0); + if (!((GET_CODE (x_addr) == VALUE + && GET_CODE (mem_addr) != VALUE + && reg_mentioned_p (x_addr, mem_addr)) + || (GET_CODE (x_addr) != VALUE + && GET_CODE (mem_addr) == VALUE + && reg_mentioned_p (mem_addr, x_addr)))) + x_addr = get_addr (x_addr); + } if (! base_alias_check (x_addr, mem_addr, GET_MODE (x), mem_mode)) return 0; @@ -2394,8 +2413,18 @@ write_dependence_p (const_rtx mem, const_rtx x, int writep) if (MEM_ADDR_SPACE (mem) != MEM_ADDR_SPACE (x)) return 1; - x_addr = get_addr (XEXP (x, 0)); - mem_addr = get_addr (XEXP (mem, 0)); + x_addr = XEXP (x, 0); + mem_addr = XEXP (mem, 0); + if (!((GET_CODE (x_addr) == VALUE + && GET_CODE (mem_addr) != VALUE + && reg_mentioned_p (x_addr, mem_addr)) + || (GET_CODE (x_addr) != VALUE + && GET_CODE (mem_addr) == VALUE + && reg_mentioned_p (mem_addr, x_addr)))) + { + x_addr = get_addr (x_addr); + mem_addr = get_addr (mem_addr); + } if (! writep) { |