[Bug target/64461] bad assembly generated for Coldfire targets

["joel at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64461

--- Comment #1 from Joel Sherrill <joel at gcc dot gnu.org> ---
Doing a git bisect showed this to be the commit that broke things. Clearly not
m68k specific but triggered it. 

commit 91ae0791cbebaac673e42e53c8b7f000241a0ca1
Author: dj <dj@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Fri Aug 29 23:19:42 2014 +0000

    * expr.c (convert_move): If the target has an explicit converter,
    use it.


    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@214747
138bc75d-0d04-0410-961f-82ee72b054a4



The full git bisect log is:

# bad: [6c13ec429c328b934e9f67d5cd6f5ab55e17ce73] 2015-01-02  Tobias Burnus 
<burnus@net-b.de>
# good: [8edc9ee53be8854228d20569eee719a01a4001de] 2014-07-18  Bernd Edlinger 
<bernd.edlinger@hotmail.de>
git bisect start 'HEAD' '8edc9ee53be8854228d20569eee719a01a4001de'
# bad: [2dd9fd37811882a2c5cdcd0880c20e507256e10f] 2014-10-10  Yannick Moy 
<moy@adacore.com>
git bisect bad 2dd9fd37811882a2c5cdcd0880c20e507256e10f
# good: [1d8a14f043cccdaeee0a0782560a398a902e15cf] Daily bump.
git bisect good 1d8a14f043cccdaeee0a0782560a398a902e15cf
# bad: [e3b7afcb34c7c4d4cd2f876e83fc2c90c2eeaae6] 2014-09-11  Segher
Boessenkool  <segher@kernel.crashing.org>
git bisect bad e3b7afcb34c7c4d4cd2f876e83fc2c90c2eeaae6
# bad: [67e0a76ed4c526001119ad5d78f49f2cb2f780a0] Fix typo.
git bisect bad 67e0a76ed4c526001119ad5d78f49f2cb2f780a0
# good: [ae799283c5ecc25191575fb5ec2bc16d97674437] Use rtx_expr_list for
expr_status.x_forced_labels
git bisect good ae799283c5ecc25191575fb5ec2bc16d97674437
# good: [8c409b9147aa9f2c536bffe1db93e30ac740d99c] AVX-512. Support
512-bit/masked interleave.
git bisect good 8c409b9147aa9f2c536bffe1db93e30ac740d99c
# good: [c1920e9db30af5043bdc942cfdf374b832687ee4] 2014-08-29  Richard Biener 
<rguenther@suse.de>
git bisect good c1920e9db30af5043bdc942cfdf374b832687ee4
# good: [6843b812545c8f94708624f6332ea3873cc952fc] PR 62215 Reinstate unlinking
old module file before renaming.
git bisect good 6843b812545c8f94708624f6332ea3873cc952fc
# bad: [1c0165c81ccfbe4fbadd96ac8b85c59a0002cab6]     * config/pa/pa.c
(pa_assemble_integer): Don't add PLABEL relocation     prefix to function
labels when generating fast indirect calls.
git bisect bad 1c0165c81ccfbe4fbadd96ac8b85c59a0002cab6
# bad: [4765975cb2f85d61e801d12562b39da2d1e25f2c] * cppbuiltin.c
(define_builtin_macros_for_type_sizes): Round pointer size up to a power of
two. * defaults.h (DWARF2_ADDR_SIZE): Round up. (POINTER_SIZE_UNITS): New,
rounded up value. * dwarf2asm.c (size_of_encoded_value): Use it.
(dw2_output_indirect_constant_1): Likewise. * expmed.c (init_expmed_one_conv):
We now know the sizes of partial int modes. * loop-iv.c
(iv_number_of_iterations): Use precision, not size. * optabs.c (expand_float):
Use precision, not size. (expand_fix): Likewise. * simplify-rtx
(simplify_unary_operation_1): Likewise. * tree-dfa.c (get_ref_base_and_extent):
Likewise. * varasm.c (assemble_addr_to_section): Round up pointer sizes.
(default_assemble_integer) Likewise. (dump_tm_clone_pairs): Likewise. *
dwarf2out.c (mem_loc_descriptor): Allow partial-int modes also. *
var-tracking.c (adjust_mems): Allow partial-int modes also.
(prepare_call_arguments): Likewise. * stor-layout.c (finalize_type_size):
Preserve precision. (layout_type): Use precision, not size.
git bisect bad 4765975cb2f85d61e801d12562b39da2d1e25f2c
# good: [9f30a5e055e777cdb28fd391c34ec8f3cd80a4d6] * lib/target-supports.exp
(check_effective_target_size32plus): Increase size to avoid false positives on
24-bit address spaces. * gcc.c-torture/compile/limits-stringlit.c: Skip if
msp430. * gcc.dg/lto/pr54709_1.c: Fix memcpy prototype. *
gcc.dg/torture/pta-ptrarith-3.c: Use __SIZE_TYPE__ instead of "int". *
gcc.dg/torture/pr36373-10.c: Use __SIZE_TYPE__ if present. *
gcc.dg/torture/pr57864.c: Use __SIZE_TYPE__. * gcc.dg/torture/pr26763-2.c: Use
__SIZE_TYPE__ instead of "int". * gcc.dg/tree-ssa/isolate-3.c: Use
__SIZE_TYPE__ instead of "long unsigned int". * gcc.dg/pr52549.c: Use
__SIZE_TYPE__ if present.
git bisect good 9f30a5e055e777cdb28fd391c34ec8f3cd80a4d6
# bad: [91ae0791cbebaac673e42e53c8b7f000241a0ca1] * expr.c (convert_move): If
the target has an explicit converter, use it.
git bisect bad 91ae0791cbebaac673e42e53c8b7f000241a0ca1
# first bad commit: [91ae0791cbebaac673e42e53c8b7f000241a0ca1] * expr.c
(convert_move): If the target has an explicit converter, use it.