[Bug target/106122] [12/13 Regression] ICE in fixup_args_size_notes, at expr.cc:4493 since r12-6106-gef26c151c14a8717

[roger at nextmovesoftware dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106122

Roger Sayle <roger at nextmovesoftware dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2022-06-29
                 CC|                            |roger at nextmovesoftware dot com
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |roger at nextmovesoftware dot com

--- Comment #2 from Roger Sayle <roger at nextmovesoftware dot com> ---
Mine.  Currently testing the (obvious) one line fix:

diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 125a3b4..3b6f362 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -2588,7 +2588,8 @@
   "optimize_insn_for_size_p () && optimize_size > 1
    && operands[1] != const0_rtx
    && IN_RANGE (INTVAL (operands[1]), -128, 127)
-   && !ix86_red_zone_used"
+   && !ix86_red_zone_used
+   && REGNO (operands[0]) != SP_REG"
   [(set (match_dup 2) (match_dup 1))
    (set (match_dup 0) (match_dup 3))]
 {