[Bug rtl-optimization/64532] New: [5 regression on ARM]internal compiler error: Max. number of generated reload insns per insn is achieved (90)

[pangbw at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64532

            Bug ID: 64532
           Summary: [5 regression on ARM]internal compiler error: Max.
                    number of generated reload insns per insn is achieved
                    (90)
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pangbw at gmail dot com

I know this ICE has been reported many times, but I still want to report it
again because I am not sure if my case is same as other reported cases.

Steps to reproduce:
1. cat y.i

__attribute__((noinline)) float s32_to_f32_imm1(int x)
{
  float y;
  __asm__ ("vcvt.f32.s32 %0, %1, #1" : "=w"(y) : "0"(x));
  return y;
}

2. ./xgcc y.i -B.  -mfloat-abi=hard  -mfpu=neon -O2
y.i: In function ‘s32_to_f32_imm1’:
y.i:6:1: internal compiler error: Max. number of generated reload insns per
insn is achieved (90)

 }
 ^
0x973325 lra_constraints(bool)
    ../../../gcc/gcc/lra-constraints.c:4306
0x95f689 lra(_IO_FILE*)


This is the GCC used by me:
./xgcc -v
Using built-in specs.
COLLECT_GCC=./xgcc
Target: arm-linux-gnueabi
Configured with: ../../gcc/configure --target=arm-linux-gnueabi
Thread model: posix
gcc version 5.0.0 20150107 (experimental) (GCC)