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How to avoid literal pools ?
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How to avoid literal pools ?
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Christophe Beausoleil
over 7 years ago
Note: This was originally posted on 19th January 2012 at http://forums.arm.com
Hello everyone,
I am using Cortex-R4F (TI TMS570), and I noticed that ARM C compiler often adds data in literal pools as in example below :
C code
:
RTI_Re_TickFlag = 0;
ASM generated code :
000004 4c66 LDR r4,|L1.416|
000006 2700 MOVS r7,#0
...
ENDP
|L1.416|
DCD RTI_Re_TickFlag
My problem is that this constant is in the same section than the code, so the Cortex-R4 Harward architecture (separate data/instruction) is not used at its best.
It makes load/store unit (LSU) accesses interfere with prefetch unit (PFU) accesses.
So, can we make armcc (with optimization options or some directives...) not generate literal pools ?
Thanks
Best regards
Christophe
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