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[Bug other/58545] New: [4.7/4.8 Regression] error: unable to find a register to spill in class 'POINTER_REGS'
- From: "gjl at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 26 Sep 2013 15:48:10 +0000
- Subject: [Bug other/58545] New: [4.7/4.8 Regression] error: unable to find a register to spill in class 'POINTER_REGS'
- Auto-submitted: auto-generated
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58545
Bug ID: 58545
Summary: [4.7/4.8 Regression] error: unable to find a register
to spill in class 'POINTER_REGS'
Product: gcc
Version: 4.8.1
Status: UNCONFIRMED
Keywords: ice-on-valid-code, ra
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: gjl at gcc dot gnu.org
Blocks: 56183
Target: avr
== C source ==
typedef unsigned char uint8_t;
typedef unsigned int uint16_t;
extern uint8_t f1 (const uint8_t*);
extern void f2 (uint8_t*, uint8_t);
void func (uint16_t parameter, uint8_t *addr, uint8_t data)
{
uint8_t status;
status = f1 (addr + 8);
addr++;
if (*addr == parameter + 8)
*addr = parameter;
f2 (addr, data);
f2 (addr + 8, status + 1);
}
== Command line ==
$ avr-gcc bug.c -S -Os -mmcu=atmega8
bug.c: In function 'func':
bug.c:20:1: error: unable to find a register to spill in class 'POINTER_REGS'
}
^
bug.c:20:1: error: this is the insn:
(insn 37 15 16 2 (set (reg:QI 20 r20)
(mem/c:QI (plus:HI (reg/f:HI 28 r28)
(const_int 1 [0x1])) [3 S1 A8])) bug.c:15 70 {movqi_insn}
(nil))
bug.c:20:1: internal compiler error: in spill_failure, at reload1.c:2123
bug.c:20:1: internal compiler error: Segmentation fault
== configure ==
Configured with: ../../gcc.gnu.org/trunk/configure --target=avr
--prefix=/local/gnu/install/gcc-4.8-mingw32 --host=i386-mingw32
--build=i686-linux-gnu --enable-languages=c,c++ --disable-nls --disable-shared
--with-dwarf2
== Notes ==
The compile passes with -fno-caller-saves