[Bug target/38900] ICE: unable to find a register to spill

[ktietz at gcc dot gnu dot org]

------- Comment #7 from ktietz at gcc dot gnu dot org  2009-07-06 11:54 -------
Ok, I think I found the issue. The following patch solved the ICE here. The ebx
register wasn't allowed for sibcall_1 in i386.md, but for fastcall it can be
used for sibcalling.

I have to do a regression test for it, but it seems to work well.

Index: config/i386/i386.md
===================================================================
--- config/i386/i386.md (revision 149152)
+++ config/i386/i386.md (working copy)
@@ -15536,7 +15536,7 @@
   [(set_attr "type" "call")])

 (define_insn "*sibcall_1"
-  [(call (mem:QI (match_operand:SI 0 "sibcall_insn_operand" "s,c,d,a"))
+  [(call (mem:QI (match_operand:SI 0 "sibcall_insn_operand" "s,c,d,a,b"))
         (match_operand 1 "" ""))]
   "SIBLING_CALL_P (insn) && !TARGET_64BIT"
 {
@@ -22183,7 +22183,7 @@

 (define_insn "*sibcall_value_1"
   [(set (match_operand 0 "" "")
-       (call (mem:QI (match_operand:SI 1 "sibcall_insn_operand" "s,c,d,a"))
+       (call (mem:QI (match_operand:SI 1 "sibcall_insn_operand" "s,c,d,a,b"))
              (match_operand:SI 2 "" "")))]
   "SIBLING_CALL_P (insn) && !TARGET_64BIT"
 {


-- 

ktietz at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|2009-05-13 20:04:31         |2009-07-06 11:54:21
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38900