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| author | Vladimir Makarov <vmakarov@redhat.com> | 2014-06-16 21:39:42 +0000 |
|---|---|---|
| committer | Vladimir Makarov <vmakarov@gcc.gnu.org> | 2014-06-16 21:39:42 +0000 |
| commit | ba38538fd68b2542277ea236a06b9f418e6d77bd (patch) | |
| tree | 3301e0b3e18a3af128c45ede67e7edc48c2a4ef4 /gcc/lra-constraints.c | |
| parent | 7049aed6c84ea55355f2173cb74d5717abadf1b2 (diff) | |
| download | gcc-ba38538fd68b2542277ea236a06b9f418e6d77bd.zip gcc-ba38538fd68b2542277ea236a06b9f418e6d77bd.tar.gz gcc-ba38538fd68b2542277ea236a06b9f418e6d77bd.tar.bz2 | |
re PR rtl-optimization/61325 (aarch64_be build fails)
2014-06-16 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/61325
* lra-constraints.c (valid_address_p): Add forward declaration.
(simplify_operand_subreg): Check address validity before and after
alter_reg of memory subreg.
From-SVN: r211715
Diffstat (limited to 'gcc/lra-constraints.c')
| -rw-r--r-- | gcc/lra-constraints.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c index ab8fe34..b1904e1 100644 --- a/gcc/lra-constraints.c +++ b/gcc/lra-constraints.c @@ -1333,6 +1333,8 @@ insert_move_for_subreg (rtx *before, rtx *after, rtx origreg, rtx newreg) } } +static int valid_address_p (enum machine_mode mode, rtx addr, addr_space_t as); + /* Make reloads for subreg in operand NOP with internal subreg mode REG_MODE, add new reloads for further processing. Return true if any reload was generated. */ @@ -1363,10 +1365,26 @@ simplify_operand_subreg (int nop, enum machine_mode reg_mode) equivalences in function lra_constraints) and because for spilled pseudos we allocate stack memory enough for the biggest corresponding paradoxical subreg. */ - if ((MEM_P (reg) - && (! SLOW_UNALIGNED_ACCESS (mode, MEM_ALIGN (reg)) - || MEM_ALIGN (reg) >= GET_MODE_ALIGNMENT (mode))) - || (REG_P (reg) && REGNO (reg) < FIRST_PSEUDO_REGISTER)) + if (MEM_P (reg) + && (! SLOW_UNALIGNED_ACCESS (mode, MEM_ALIGN (reg)) + || MEM_ALIGN (reg) >= GET_MODE_ALIGNMENT (mode))) + { + rtx subst, old = *curr_id->operand_loc[nop]; + + alter_subreg (curr_id->operand_loc[nop], false); + subst = *curr_id->operand_loc[nop]; + lra_assert (MEM_P (subst)); + if (! valid_address_p (GET_MODE (reg), XEXP (reg, 0), + MEM_ADDR_SPACE (reg)) + || valid_address_p (GET_MODE (subst), XEXP (subst, 0), + MEM_ADDR_SPACE (subst))) + return true; + /* If the address was valid and became invalid, prefer to reload + the memory. Typical case is when the index scale should + correspond the memory. */ + *curr_id->operand_loc[nop] = old; + } + else if (REG_P (reg) && REGNO (reg) < FIRST_PSEUDO_REGISTER) { alter_subreg (curr_id->operand_loc[nop], false); return true; |