Do not use TYPE_CANONICAL in useless_type_conversion

[Andreas Schwab]

Eric Botcazou <ebotcazou@adacore.com> writes:

>> Thank you! I commited the patch.
>
> It breaks the Ada build on x86-64 though:

Also on ia64:

/usr/local/gcc/test/Build/./prev-gcc/xgcc -B/usr/local/gcc/test/Build/./prev-gcc/ -B/usr/ia64-suse-linux/bin/ -B/usr/ia64-suse-linux/bin/ -B/usr/ia64-suse-linux/lib/ -isystem /usr/ia64-suse-linux/include -isystem /usr/ia64-suse-linux/sys-include    -c -g -O2 -gtoggle  -gnatpg -gnata -W -Wall -nostdinc -I- -I. -Iada/generated -Iada -I../../gcc/ada -I../../gcc/ada/gcc-interface ../../gcc/ada/eval_fat.adb -o ada/eval_fat.o
+===========================GNAT BUG DETECTED==============================+
| 6.0.0 20151007 (experimental) (ia64-suse-linux) GCC error:               |
| in convert_move, at expr.c:282                                           |
| Error detected around ../../gcc/ada/eval_fat.adb:191:21                  |

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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