[Bug target/53447] missed optimization of 64bit ALU operation with small constant

[carrot at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53447

--- Comment #3 from carrot at gcc dot gnu.org 2012-07-01 15:14:56 UTC ---
Author: carrot
Date: Sun Jul  1 15:14:52 2012
New Revision: 189102

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=189102
Log:
    PR target/53447
    * config/arm/arm-protos.h (const_ok_for_dimode_op): New prototype.
    * config/arm/arm.c (const_ok_for_dimode_op): New function.
    * config/arm/constraints.md (Dd): New constraint.
    * config/arm/predicates.md (arm_adddi_operand): New predicate.
    * config/arm/arm.md (adddi3): Extend it to handle constants.
    (arm_adddi3): Likewise.
    (addsi3_carryin_<optab>): Extend it to handle sbc case.
    (addsi3_carryin_alt2_<optab>): Likewise.
    * config/arm/neon.md (adddi3_neon): Extend it to handle constants.

    * gcc.target/arm/pr53447-1.c: New testcase.
    * gcc.target/arm/pr53447-2.c: New testcase.
    * gcc.target/arm/pr53447-3.c: New testcase.
    * gcc.target/arm/pr53447-4.c: New testcase.


Added:
    trunk/gcc/testsuite/gcc.target/arm/pr53447-1.c
    trunk/gcc/testsuite/gcc.target/arm/pr53447-2.c
    trunk/gcc/testsuite/gcc.target/arm/pr53447-3.c
    trunk/gcc/testsuite/gcc.target/arm/pr53447-4.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/arm/arm-protos.h
    trunk/gcc/config/arm/arm.c
    trunk/gcc/config/arm/arm.md
    trunk/gcc/config/arm/constraints.md
    trunk/gcc/config/arm/neon.md
    trunk/gcc/config/arm/predicates.md
    trunk/gcc/testsuite/ChangeLog