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[committed][RISC-V]Don't reject constants in cmov condition

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This test is too aggressive.  Constants have VOIDmode, so we need to let the
through this phase of conditional move support.

Fixes several missed conditional moves with the trunk.

gcc/
	* config/riscv/riscv.cc (riscv_expand_conditional_move): Allow
	VOIDmode operands to conditional before canonicalization.
This commit is contained in:
Jeff Law 2023-08-07 14:34:40 -06:00
parent adfc236c62
commit 18c453f0e6
1 changed files with 2 additions and 1 deletions
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3
gcc/config/riscv/riscv.cc
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@ -3582,7 +3582,8 @@ riscv_expand_conditional_move (rtx dest, rtx op, rtx cons, rtx alt)
enforce that so that we don't strip away a sign_extension
thinking it is unnecessary. We might consider using
riscv_extend_operands if they are not already properly extended. */
if (GET_MODE (op0) != word_mode || GET_MODE (op1) != word_mode)
if ((GET_MODE (op0) != word_mode && GET_MODE (op0) != VOIDmode)
|| (GET_MODE (op1) != word_mode && GET_MODE (op1) != VOIDmode))
return false;
/* Canonicalize the comparison. It must be an equality comparison