[Bug rtl-optimization/57559] New: S/390: ICE with lra

[krebbel at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57559

            Bug ID: 57559
           Summary: S/390: ICE with lra
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: krebbel at gcc dot gnu.org

t.c:

typedef int int32_t;
typedef unsigned char uint8_t;
typedef unsigned int uint32_t;
struct _IO_marker
{
};
static const int32_t mfcone = 1;
static const uint8_t *mfctop = (const uint8_t *) &mfcone;
int32_t
decContextTestEndian (uint8_t quiet)
{
  int32_t res = 0;
  uint32_t dle = (uint32_t) 0;
  if (*mfctop != 0)
    {
      res = (int32_t) * mfctop - dle;
    }
  return res;
}

cc1 -fpreprocessed  -quiet -march=z10 -m64 -mzarch  -O1 t.c -o t.s

t.c: In function ‘decContextTestEndian’:
t.c:19:1: internal compiler error: Max. number of generated reload insns per
insn is achieved (90)

 }
 ^
0x806b1637 lra_constraints(bool)
        /home/andreas/clean/gcc-head/gcc/lra-constraints.c:3698
0x80697d8b lra(_IO_FILE*)
        /home/andreas/clean/gcc-head/gcc/lra.c:2278
0x80621aeb do_reload
        /home/andreas/clean/gcc-head/gcc/ira.c:4641
0x80621dfd rest_of_handle_reload
        /home/andreas/clean/gcc-head/gcc/ira.c:4753
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.


The testcase works fine with either -mno-lra or -march=z9-109