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Type:
Enhancement
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Resolution: Unresolved
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Priority:
Low
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Code Generation Tools
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CODEGEN-9976
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MSP430_21.6.0.LTS
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default
The attached file.c includes these lines ...
uint8_t shift_right_toU8(uint16_t val)
{
return val >> 8U;
}
It has 3 more functions that are similar. Build it ...
% cl430 -k -o file.c
Then inspect the resulting file.asm. The key lines for the function above are ...
shift_right_toU8:
;* --------------------------------------------------------------------------*
;** 5 ----------------------- return (unsigned char)(val>>8u);
SWPB r12 ; [] |5|
MOV.B r12,r12 ; [] |5|
MOV.B r12,r12 ; [] |5|
RET ; []
The second MOV.B is redundant.
The other 3 functions, while similar, sometimes have the same problem, but sometimes not.
