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register allocation problem


hello,
The problem I am getting is that GCC fails to assign
register to virtual-stack-dynamic-regnum
Initial RTL is

(insn 197 196 200 (set (mem/s:QI (plus:QI (reg/f:QI 37
virtual-stack-dynamic)
                (const_int 392 [0x188])) 0)
        (reg:QI 78)) -1 (nil)
    (nil))

the RTL after register allocation is


(insn 197 196 200 (set (mem/s:QI (plus:QI (reg/f:QI 37
virtual-stack-dynamic)
                (const_int 392 [0x188])) 0)
        (reg:QI 0 r0 [78])) 2 {*movqi_insn} (nil)
    (nil))

regards,
danish


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