[gcc r15-1206] LoongArch: Fix mode size comparision in loongarch_expand_conditional_move

[Xi Ruoyao]

https://gcc.gnu.org/g:53c703888eb51314f762c8998dc9215871b12722

commit r15-1206-g53c703888eb51314f762c8998dc9215871b12722
Author: Xi Ruoyao <xry111@xry111.site>
Date:   Wed Jun 12 11:01:53 2024 +0800

    LoongArch: Fix mode size comparision in loongarch_expand_conditional_move
    
    We were comparing a mode size with word_mode, but word_mode is an enum
    value thus this does not really make any sense.  (Un)luckily E_DImode
    happens to be 8 so this seemed to work, but let's make it correct so it
    won't blow up when we add LA32 support or add another machine mode...
    
    gcc/ChangeLog:
    
            * config/loongarch/loongarch.cc
            (loongarch_expand_conditional_move): Compare mode size with
            UNITS_PER_WORD instead of word_mode.

Diff:
---
 gcc/config/loongarch/loongarch.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/config/loongarch/loongarch.cc b/gcc/config/loongarch/loongarch.cc
index 1b6df6a43650..6ec3ee625026 100644
--- a/gcc/config/loongarch/loongarch.cc
+++ b/gcc/config/loongarch/loongarch.cc
@@ -5352,7 +5352,7 @@ loongarch_expand_conditional_move (rtx *operands)
     loongarch_emit_float_compare (&code, &op0, &op1);
   else
     {
-      if (GET_MODE_SIZE (GET_MODE (op0)) < word_mode)
+      if (GET_MODE_SIZE (GET_MODE (op0)) < UNITS_PER_WORD)
 	{
 	  promote_op[0] = (REG_P (op0) && REG_P (operands[2]) &&
 			   REGNO (op0) == REGNO (operands[2]));