[Bug target/77308] surprisingly large stack usage for sha512 on arm

[edlinger at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77308

--- Comment #63 from Bernd Edlinger <edlinger at gcc dot gnu.org> ---
Author: edlinger
Date: Thu Nov 17 13:47:24 2016
New Revision: 242549

URL: https://gcc.gnu.org/viewcvs?rev=242549&root=gcc&view=rev
Log:
2016-11-17  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        PR target/77308
        * config/arm/arm.md (*thumb2_ldrd, *thumb2_ldrd_base,
        *thumb2_ldrd_base_neg, *thumb2_strd, *thumb2_strd_base,
        *thumb2_strd_base_neg): Recognize insn regardless of
        current_tune->prefer_ldrd_strd.
        * config/arm/ldrdstrd.md: Enable all ldrd/strd peephole rules
        whenever possible.

testsuite:
2016-11-17  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        PR target/77308
        * gcc.target/arm/pr53447-5.c: New test.
        * lib/target-supports.exp
        (check_effective_target_arm_prefer_ldrd_strd): Adjust.

Added:
    trunk/gcc/testsuite/gcc.target/arm/pr53447-5.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/arm/arm.md
    trunk/gcc/config/arm/ldrdstrd.md
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/lib/target-supports.exp