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combine: Print to dump if some insn cannot be combined into i3
authorSegher Boessenkool <segher@kernel.crashing.org>
Wed, 29 Nov 2017 22:51:16 +0000 (23:51 +0100)
committerSegher Boessenkool <segher@gcc.gnu.org>
Wed, 29 Nov 2017 22:51:16 +0000 (23:51 +0100)
commit3d985316b89f2551a8fb39687bf4972b372ffdd7
tree18c98170abdf7bfb6a805c7fba55b1797cfbd691tree
parent4a01617886c1833f456948048e5167dac784ef19commit | diff
combine: Print to dump if some insn cannot be combined into i3

Eventually we should print the reason that any combination fails.
This is a good start (these happen often).

* combine.c (try_combine): Print a message to dump file whenever
I0, I1, or I2 cannot be combined into I3.

From-SVN: r255261
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