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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/65729] [5 Regression] ICE (in prohibited_class_reg_set_mode_p, at lra-constraints.c) on arm-linux-gnueabihf
Date: Fri, 10 Apr 2015 07:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65729

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-04-10
                 CC|                            |jakub at gcc dot gnu.org,
                   |                            |vmakarov at gcc dot gnu.org
   Target Milestone|---                         |5.0
     Ever confirmed|0                           |1

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Seems -march=armv7-a -mfloat-abi=hard -O2 is needed to trigger it.
Reduced testcase:
double
foo (void)
{
  double x = 0.0;
  asm volatile ("" : "+gw" (x));
  return x;
}
Already ICEd back in February on the trunk (don't have older snapshots), and
4.9.0 20140401 doesn't ICE.