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ifcvt: Reject inner floating modes of a subreg for noce_try_cond_zero_arith [PR123491]

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Like the check that was added in r16-6374-g2680785a6d14d7d78550edb8361f3b47eb5c4cb6,
except this is for the new code that was added with r16-6436-g92f2a86794ad88d773b102.
Basically the code only expects to work with scalar integer modes but forgot
to check that.

Pushed as obvious after bootstrap/test on x86_64-linux-gnu.

	PR rtl-optimization/123491
gcc/ChangeLog:

	* ifcvt.cc (noce_try_cond_zero_arith): Reject non-scalar
	integer modes for the inner mode of the subreg.

Signed-off-by: Andrew Pinski <andrew.pinski@oss.qualcomm.com>
This commit is contained in:
Andrew Pinski
2026-01-08 18:58:57 -08:00
parent 07df546fb9
commit ab6621a77f
1 changed files with 6 additions and 2 deletions
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8
gcc/ifcvt.cc
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@@ -3213,9 +3213,13 @@ noce_try_cond_zero_arith (struct noce_if_info *if_info)
afterwards. */
if (GET_CODE (tmp) != SUBREG || !subreg_lowpart_p (tmp))
return false;
start_sequence ();
tmp = SUBREG_REG (tmp);
/* Only handle integer scalar modes for the inner mode of
the subreg. */
if (!SCALAR_INT_MODE_P (GET_MODE (tmp)))
return false;
start_sequence ();
target = gen_reg_rtx (GET_MODE (tmp));
target = noce_emit_cmove (if_info, target, code,
XEXP (cond, 0), XEXP (cond, 1),