[Bug target/90547] [8/9/10 Regression] ICE in gen_lowpart_general, at rtlhooks.c:63

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90547

Uroš Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2019-05-20
           Assignee|unassigned at gcc dot gnu.org      |ubizjak at gmail dot com
   Target Milestone|---                         |7.5
     Ever confirmed|0                           |1

--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
Patch in testing:

--cut here--
Index: config/i386/i386.md
===================================================================
--- config/i386/i386.md (revision 271430)
+++ config/i386/i386.md (working copy)
@@ -8525,6 +8525,14 @@
       operands[2] = shallow_copy_rtx (operands[2]);
       PUT_MODE (operands[2], SImode);
     }
+  else if (GET_CODE (operands[2]) == CONST)
+    {
+      /* (const:DI (plus:DI (symbol_ref:DI ("...")) (const_int N))) */
+      operands[2] = copy_rtx (operands[2]);
+      PUT_MODE (operands[2], SImode);
+      PUT_MODE (XEXP (operands[2], 0), SImode);
+      PUT_MODE (XEXP (XEXP (operands[2], 0), 0), SImode);
+    }    
   else
     operands[2] = gen_lowpart (SImode, operands[2]);
 })
--cut here--