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| author | Richard Sandiford <richard.sandiford@linaro.org> | 2018-02-05 10:47:56 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2018-02-05 10:47:56 +0000 |
| commit | 87e176dfd4d2e457353eccd04e99fcb8710fb9f0 (patch) | |
| tree | c07a26a19e373447bef2f63b07a0ea30ed4267b1 /gcc/ira.c | |
| parent | b95852cc0000e768b72a5e53ab9d7fd0c81d9cba (diff) | |
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Adjust ira_init_register_move_cost comment
2018-02-05 Richard Sandiford <richard.sandiford@linaro.org>
gcc/
* ira.c (ira_init_register_move_cost): Adjust comment.
From-SVN: r257385
Diffstat (limited to 'gcc/ira.c')
| -rw-r--r-- | gcc/ira.c | 6 |
1 files changed, 4 insertions, 2 deletions
@@ -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++) { |