[Bug target/112686] [14 Regression] ICE: in gen_reg_rtx, at emit-rtl.cc:1176 with -fsplit-stack -mcmodel=large

[ubizjak at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112686

Uroš Bizjak  changed:

   What|Removed |Added

 Resolution|--- |FIXED
 Status|ASSIGNED|RESOLVED
 CC|uros at gcc dot gnu.org|

--- Comment #5 from Uroš Bizjak  ---
Fixed.

[Bug target/112686] [14 Regression] ICE: in gen_reg_rtx, at emit-rtl.cc:1176 with -fsplit-stack -mcmodel=large

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112686

--- Comment #4 from CVS Commits  ---
The master branch has been updated by Uros Bizjak :

https://gcc.gnu.org/g:404ea4c1381398aee162415a88e5cb81c44f8c69

commit r14-5830-g404ea4c1381398aee162415a88e5cb81c44f8c69
Author: Uros Bizjak 
Date:   Fri Nov 24 16:11:27 2023 +0100

i386: Fix ICE with -fsplit-stack -mcmodel=large [PR112686]

For -mcmodel=large, we have to load function address to a register.

PR target/112686

gcc/ChangeLog:

* config/i386/i386.cc (ix86_expand_split_stack_prologue): Load
function address to a register for ix86_cmodel == CM_LARGE.

gcc/testsuite/ChangeLog:

* gcc.target/i386/pr112686.c: New test.

[Bug target/112686] [14 Regression] ICE: in gen_reg_rtx, at emit-rtl.cc:1176 with -fsplit-stack -mcmodel=large

[ubizjak at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112686

Uroš Bizjak  changed:

   What|Removed |Added

   Assignee|unassigned at gcc dot gnu.org  |ubizjak at gmail dot com
 Status|NEW |ASSIGNED

--- Comment #3 from Uroš Bizjak  ---
diff --git a/gcc/config/i386/i386.cc b/gcc/config/i386/i386.cc
index 7b922857d80..50e8826dbe5 100644
--- a/gcc/config/i386/i386.cc
+++ b/gcc/config/i386/i386.cc
@@ -10503,7 +10503,7 @@ ix86_expand_split_stack_prologue (void)
  fn = copy_to_suggested_reg (x, reg11, Pmode);
}
  else
-   fn = split_stack_fn_large;
+   fn = copy_to_suggested_reg (split_stack_fn_large, reg11, Pmode);

  /* When using the large model we need to load the address
 into a register, and we've run out of registers.  So we

[Bug target/112686] [14 Regression] ICE: in gen_reg_rtx, at emit-rtl.cc:1176 with -fsplit-stack -mcmodel=large

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112686

Jakub Jelinek  changed:

   What|Removed |Added

 CC||jakub at gcc dot gnu.org,
   ||uros at gcc dot gnu.org

--- Comment #2 from Jakub Jelinek  ---
Indeed, it is r14-5784-g2f3f8952ff1736.

[Bug target/112686] [14 Regression] ICE: in gen_reg_rtx, at emit-rtl.cc:1176 with -fsplit-stack -mcmodel=large

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112686

Andrew Pinski  changed:

   What|Removed |Added

 Ever confirmed|0   |1
 Status|UNCONFIRMED |NEW
   See Also||https://gcc.gnu.org/bugzill
   ||a/show_bug.cgi?id=89316
   Last reconfirmed||2023-11-23
   Target Milestone|--- |14.0

--- Comment #1 from Andrew Pinski  ---
Most likely introduced by r14-5784-g2f3f8952ff1736 .

It is a bit upsetting the testcase from PR 46089 is the same testcase here was
not added back when PR 46089 was fixed in 4.6.