[Bug target/123320] [Trunk] Loongarch64: ICE at -Os during RTL pass: peephole2

[xry111 at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123320

Xi Ruoyao <xry111 at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2025-12-29
     Ever confirmed|0                           |1
                 CC|                            |xry111 at gcc dot gnu.org

--- Comment #2 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
Tentative fix:

diff --git a/gcc/config/loongarch/loongarch.md
b/gcc/config/loongarch/loongarch.md
index 39e315c818b..09054bc97db 100644
--- a/gcc/config/loongarch/loongarch.md
+++ b/gcc/config/loongarch/loongarch.md
@@ -648,7 +648,7 @@ (define_expand "<optab><mode>3"
                     (match_operand:SI 2 "arith_operand" "rI")))]
   ""
 {
-  if (TARGET_64BIT && <MODE>mode == SImode)
+  if (TARGET_64BIT && <MODE>mode == SImode && can_create_pseudo_p ())
     {
       rtx t = gen_reg_rtx (DImode);
       emit_insn (gen_<optab>si3_extend (t, operands[1], operands[2]));