[Bug bootstrap/103820] [12 Regression] i686 failed to bootstrap with ada by r12-6077

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103820

--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 284b9507466..9d6786c5c2e 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -8588,7 +8588,8 @@ (define_peephole2
         (any_mul_highpart:SWI48 (match_dup 2) (match_dup 0)))
         (clobber (match_dup 2))
         (clobber (reg:CC FLAGS_REG))])]
-  "REGNO (operands[0]) != REGNO (operands[2])
+  "TARGET_64BIT
+   && REGNO (operands[0]) != REGNO (operands[2])
    && REGNO (operands[0]) != REGNO (operands[3])
    && (REGNO (operands[0]) == REGNO (operands[4])
        || peep2_reg_dead_p (3, operands[0]))"

is sufficient to restore bootstrap.