[Bug rtl-optimization/15482] New: can't find a register in class `GENERAL_REGS' while reloading `asm'

["pbrook at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

Compiling the following code with arm-none-elf-gcc -O2 -fno-apcs-frame gives  
"can't find a register in class `GENERAL_REGS' while reloading `asm'"  
  
void bar(int, int, int, int);  
int x;  
int foo (int a1, int a2, int a3)  
{  
  int b;  
  __asm volatile("mov %0, #0":"=r" (b)::  
  /* Clobber everything except the first 3 argument registers.  */  
      , "r3", "r4", "r5", "r6", "r7"  
      , "r8", "r9", "sl","ip", "lr", "fp");  
  x = b;  
  bar(a1, a2, a3);  
}  
  
Similar examples can probably be constructed on other targets that pass  
function args in registers.

-- 
           Summary: can't find a register in class `GENERAL_REGS' while
                    reloading `asm'
           Product: gcc
           Version: tree-ssa
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P2
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pbrook at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: arm-none-elf


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15482