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| author | Nick Clifton <nickc@redhat.com> | 2014-04-03 13:02:27 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@gcc.gnu.org> | 2014-04-03 13:02:27 +0000 |
| commit | 0886676007c494d1a74efb0512d31f36171f3b0c (patch) | |
| tree | 700a658b58e7c59384e9c221d8a9bc7ce1964b64 /gcc | |
| parent | 5bed50e827ee7d43a3bd52fd7480fa1b33e25fdc (diff) | |
| download | gcc-0886676007c494d1a74efb0512d31f36171f3b0c.zip gcc-0886676007c494d1a74efb0512d31f36171f3b0c.tar.gz gcc-0886676007c494d1a74efb0512d31f36171f3b0c.tar.bz2 | |
rl78-expand.md (movqi): Handle (SUBREG (SYMBOL_REF)) properly.
* config/rl78/rl78-expand.md (movqi): Handle (SUBREG (SYMBOL_REF))
properly.
From-SVN: r209055
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/rl78/rl78-expand.md | 17 |
2 files changed, 16 insertions, 6 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 20447da..5d7eef5 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2014-04-03 Nick Clifton <nickc@redhat.com> + + * config/rl78/rl78-expand.md (movqi): Handle (SUBREG (SYMBOL_REF)) + properly. + 2014-04-03 Martin Jambor <mjambor@suse.cz> * ipa-cp.c (ipcp_verify_propagated_values): Also dump symtab and diff --git a/gcc/config/rl78/rl78-expand.md b/gcc/config/rl78/rl78-expand.md index f794d7c..f61e444 100644 --- a/gcc/config/rl78/rl78-expand.md +++ b/gcc/config/rl78/rl78-expand.md @@ -30,18 +30,23 @@ if (rl78_far_p (operands[0]) && rl78_far_p (operands[1])) operands[1] = copy_to_mode_reg (QImode, operands[1]); - /* FIXME: Not sure how GCC can generate (SUBREG (SYMBOL_REF)), - but it does. Since this makes no sense, reject it here. */ + /* GCC can generate (SUBREG (SYMBOL_REF)) when it has to store a symbol + into a bitfield, or a packed ordinary field. We can handle this + provided that the destination is a register. If not, then load the + source into a register first. */ if (GET_CODE (operands[1]) == SUBREG - && GET_CODE (XEXP (operands[1], 0)) == SYMBOL_REF) - FAIL; + && GET_CODE (XEXP (operands[1], 0)) == SYMBOL_REF + && ! REG_P (operands[0])) + operands[1] = copy_to_mode_reg (QImode, operands[1]); + /* Similarly for (SUBREG (CONST (PLUS (SYMBOL_REF)))). cf. g++.dg/abi/packed.C. */ if (GET_CODE (operands[1]) == SUBREG && GET_CODE (XEXP (operands[1], 0)) == CONST && GET_CODE (XEXP (XEXP (operands[1], 0), 0)) == PLUS - && GET_CODE (XEXP (XEXP (XEXP (operands[1], 0), 0), 0)) == SYMBOL_REF) - FAIL; + && GET_CODE (XEXP (XEXP (XEXP (operands[1], 0), 0), 0)) == SYMBOL_REF + && ! REG_P (operands[0])) + operands[1] = copy_to_mode_reg (QImode, operands[1]); if (CONST_INT_P (operands[1]) && ! IN_RANGE (INTVAL (operands[1]), (-1 << 8) + 1, (1 << 8) - 1)) FAIL; |