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combine: Use single_set for is_just_move

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Since we now only call is_just_move on the original instructions, we
always have an rtx_insn* (not just a pattern), so we can use single_set
on it.  This makes no detectable difference at all on all thirty Linux
targets I test, but it does help cris, and it is simpler, cleaner code
anyway.

2020-07-16  Hans-Peter Nilsson  <hp@axis.com>
	    Segher Boessenkool  <segher@kernel.crashing.org>

	PR target/93372
	* combine.c (is_just_move): Take an rtx_insn* as argument.  Use
	single_set on it.
This commit is contained in:
Segher Boessenkool 2020-07-16 23:42:46 +00:00
parent 39dda00208
commit 84c5396d4b
1 changed files with 6 additions and 5 deletions
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11
gcc/combine.c
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@ -2624,15 +2624,16 @@ can_split_parallel_of_n_reg_sets (rtx_insn *insn, int n)
return true;
}
/* Return whether X is just a single set, with the source
/* Return whether X is just a single_set, with the source
a general_operand. */
static bool
is_just_move (rtx x)
is_just_move (rtx_insn *x)
{
if (INSN_P (x))
x = PATTERN (x);
rtx set = single_set (x);
if (!set)
return false;
return (GET_CODE (x) == SET && general_operand (SET_SRC (x), VOIDmode));
return general_operand (SET_SRC (set), VOIDmode);
}
/* Callback function to count autoincs. */