diff options
Diffstat (limited to 'gcc/function.c')
| -rw-r--r-- | gcc/function.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/gcc/function.c b/gcc/function.c index e452865..b513ead 100644 --- a/gcc/function.c +++ b/gcc/function.c @@ -5148,15 +5148,16 @@ expand_function_start (tree subr) /* Compute the return values into a pseudo reg, which we will copy into the true return register after the cleanups are done. */ tree return_type = TREE_TYPE (res); - /* If we may coalesce this result, make sure it has the expected - mode. */ - if (flag_tree_coalesce_vars && is_gimple_reg (res)) - { - tree def = ssa_default_def (cfun, res); - gcc_assert (def); - machine_mode mode = promote_ssa_mode (def, NULL); - set_parm_rtl (res, gen_reg_rtx (mode)); - } + + /* If we may coalesce this result, make sure it has the expected mode + in case it was promoted. But we need not bother about BLKmode. */ + machine_mode promoted_mode + = flag_tree_coalesce_vars && is_gimple_reg (res) + ? promote_ssa_mode (ssa_default_def (cfun, res), NULL) + : BLKmode; + + if (promoted_mode != BLKmode) + set_parm_rtl (res, gen_reg_rtx (promoted_mode)); else if (TYPE_MODE (return_type) != BLKmode && targetm.calls.return_in_msb (return_type)) /* expand_function_end will insert the appropriate padding in |