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regalloclinearscan
2010 Oct 03
1
[LLVMdev] [LLVMDev] Coalescing Registers
I want to full understand register coalescing and how to coalesce
copies. From what I have seen from "SimpleRegisterCoalescing,"
"RegAllocLinearSpan," and "RegAllocPBQP" there are three indicators
for the copy instruction x = copy y. Assume that the value number of x
does not equal the value number of y.
For "x = copy y", let the boolean values a,b, and c, equal the following:
a = x is virtual or physical,
b = y is vir...