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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/112380] [14 regression] ICE when building Mesa
 (in combine, internal compiler error: in simplify_subreg)
Date: Sat, 04 Nov 2023 18:02:11 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112380

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
```
Trying 25, 31, 32 -> 34:
   25: strict_low_part(r114:TI#0)=3Dr102:QI
      REG_DEAD r102:QI
   31: {r131:SI=3Dr130:SI&0x1f800;clobber flags:CC;}
      REG_DEAD r130:SI
      REG_UNUSED flags:CC
   32: {r132:SI=3Dr114:TI#0&0xfffffffffffe07ff;clobber flags:CC;}
      REG_UNUSED flags:CC
   34: {r134:DI=3Dzero_extend(r131:SI|r132:SI);clobber flags:CC;}
      REG_UNUSED flags:CC
      REG_DEAD r131:SI
      REG_DEAD r132:SI
```
Then crash.=