[Bug target/51931] No support for MIPS16 long branches

[rsandifo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51931

--- Comment #2 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> 2012-08-02 21:32:02 UTC ---
Author: rsandifo
Date: Thu Aug  2 21:31:57 2012
New Revision: 190104

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=190104
Log:
gcc/
    PR target/51931
    * config/mips/mips-protos.h (mips_strip_unspec_address): Declare.
    * config/mips/mips.c (mips_strip_unspec_address): Make extern.
    (mips16_rewrite_pool_constant): Make a copy of the pool constant
    before adding to a PC-relative table.
    (mips16_lay_out_constants): Add a SPLIT_P parameter.
    (mips16_load_branch_target, mips16_split_long_branches): New functions.
    (mips_reorg): Update call to mips16_lay_out_constants.
    Call mips16_split_long_branches.
    * config/mips/predicates.md (pc_or_label_operand): Delete.
    * config/mips/mips.md (length): Add a calculation for MIPS16 branches.
    Move the extended_mips16 handling further down.
    (*branch_equality<mode>_mips16): Replace use pc_or_label_operand
    with explicit label_ref and pc.  Follow the usual operand numbering.
    (*branch_equality<mode>_mips16_inverted): New pattern.
    (*jump_mips16): Add length attribute.
    (indirect_jump_and_restore_<mode>): New pattern.
    (consttable_int): Call mips_strip_unspec_address on the operand.

gcc/testsuite/
    PR target/51931
    * gcc.c-torture/compile/20001226-1.c: Remove nomips16 attribute.
    * g++.dg/opt/longbranch1.C: Likewise.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/mips/mips-protos.h
    trunk/gcc/config/mips/mips.c
    trunk/gcc/config/mips/mips.md
    trunk/gcc/config/mips/predicates.md
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/opt/longbranch1.C
    trunk/gcc/testsuite/gcc.c-torture/compile/20001226-1.c