November 2012
Intermediate to advanced
381 pages
13h 26m
English
book
Introduction to Compiler Construction in a Java World
by Bill Campbell, Swami Iyer, Bahar Akbal-Delibas
Content preview from Introduction to Compiler Construction in a Java World
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250 An Introduction to Compiler Construction in a Java World
FIGURE 7.3 Control-flow graph for Factorial.computeIter() with local liveness sets
computed.
Our next step is to use this local liveness information to compute global liveness infor-
mation; for each basic block, we want to know which registers are live, both coming into
the block and going out of the block.
Computing Global Liveness Sets
We can compute the set of operands that are live at the beginning and end of a block using
a backward data-flow analysis [Aho et al., 2007]. We call the set of operands that are live
at the start of a block liveIn. We call the set of operands that are live
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.