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rs6000: Fix rs6000_emit_le_vsx_store (PR98549)

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One of the advantages of LRA is that you can create new pseudos from it
just fine.  The code in rs6000_emit_le_vsx_store was not aware of this.
This patch changes that, in the process fixing PR98549 (where it is
shown that we do call rs6000_emit_le_vsx_store during LRA, which we
used to assert can not happen).

2021-01-20  Segher Boessenkool  <segher@kernel.crashing.org>

	* config/rs6000/rs6000.c (rs6000_emit_le_vsx_store): Change assert.
	Adjust comment.  Simplify code.
This commit is contained in:
Segher Boessenkool 2021-01-19 23:43:56 +00:00
parent 27c792895b
commit f8c6777766
1 changed files with 3 additions and 5 deletions
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8
gcc/config/rs6000/rs6000.c
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@ -9932,10 +9932,8 @@ rs6000_emit_le_vsx_load (rtx dest, rtx source, machine_mode mode)
void
rs6000_emit_le_vsx_store (rtx dest, rtx source, machine_mode mode)
{
/* This should never be called during or after LRA, because it does
not re-permute the source register. It is intended only for use
during expand. */
gcc_assert (!lra_in_progress && !reload_completed);
/* This should never be called after LRA. */
gcc_assert (can_create_pseudo_p ());
/* Use V2DImode to do swaps of types with 128-bit scalar parts (TImode,
V1TImode). */
@ -9946,7 +9944,7 @@ rs6000_emit_le_vsx_store (rtx dest, rtx source, machine_mode mode)
source = gen_lowpart (V2DImode, source);
}
rtx tmp = can_create_pseudo_p () ? gen_reg_rtx_and_attrs (source) : source;
rtx tmp = gen_reg_rtx_and_attrs (source);
rs6000_emit_le_vsx_permute (tmp, source, mode);
rs6000_emit_le_vsx_permute (dest, tmp, mode);
}