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ADDs. MaxOffs is used as a threshold to limit the size of the offset. Tradeoffs being: (1) If we can't materialize the large constant then we'll cause fast-isel to bail. (2) Too large of an offset can't be directly encoded in the ADD resulting in a MOV+ADD. Generally not a bad thing because otherwise we would have had ADD+ADD, but on Thumb this turns into a MOVS+MOVT+ADD. Working on a fix for that. (3) Conversely, too low of a threshold we'll miss opportunities to coalesce ADDs. rdar://10412592 llvm-svn: 144886 |
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ARM | ||
CBackend | ||
CellSPU | ||
CPP | ||
Generic | ||
MBlaze | ||
Mips | ||
MSP430 | ||
PowerPC | ||
PTX | ||
SPARC | ||
Thumb | ||
Thumb2 | ||
X86 | ||
XCore |