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Adjust ira_init_register_move_cost comment

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2018-02-05  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* ira.c (ira_init_register_move_cost): Adjust comment.

From-SVN: r257385
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Richard Sandiford 2018-02-05 10:47:56 +00:00 • committed by Richard Sandiford
parent b95852cc00
commit 87e176dfd4
2 changed files with 8 additions and 2 deletions
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gcc/ChangeLog
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@ -1,3 +1,7 @@
2018-02-05 Richard Sandiford <richard.sandiford@linaro.org>
* ira.c (ira_init_register_move_cost): Adjust comment.
2018-02-05 Martin Liska <mliska@suse.cz>
PR gcov-profile/84137

6
gcc/ira.c
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@ -1578,8 +1578,10 @@ ira_init_register_move_cost (machine_mode mode)
ira_assert (ira_register_move_cost[mode] == NULL
&& ira_may_move_in_cost[mode] == NULL
&& ira_may_move_out_cost[mode] == NULL);
/* have_regs_of_mode[mode] might be false because it might be
E_<mode> (see genmodes) of pseudo with <mode>. */
/* Note that we might be asked about the move costs of modes that
cannot be stored in any hard register, for example if an inline
asm tries to create a register operand with an impossible mode.
We therefore can't assert have_regs_of_mode[mode] here. */
for (cl1 = 0; cl1 < N_REG_CLASSES; cl1++)
for (cl2 = 0; cl2 < N_REG_CLASSES; cl2++)
{