On Wed, Feb 8, 2017 at 10:26 AM, Pete Heist <[email protected]> wrote:
> Even after the new SSA back end, they can still be large. > Take if from a long time compiler write who has nearly 30 years experience working with SSA: SSA is no panacea. It is a representation that makes some optimizations easier to express and sometimes more effective. Many of the optimizations that SSA facilitates tend to raise register pressure. I can be a very delicate balancing act. Optimizing for size is a dark art. Most compiler projects invest relatively little effort in that direction. /john
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