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Re:How I wrote a self-hosting C compiler in 40 days by sklogic on Monday December 14, 2015 @01:42PM (#10732897)
Not sure if there are any books around LLVM or gcc, but there is a lot of up to date texts.

Grune at al., "Modern Compiler Design",

Appel, "Modern Compiler Implementation in ML",

and many more.

P.S. Because of a slow-ban, adding another one to this answer. This is the best source on SSA:

http://www.cri.ensmp.fr/people/pop/papers/2006-12-thesis.pdf

Re:How I wrote a self-hosting C compiler in 40 days by sgeisenh on Monday December 14, 2015 @03:41PM (#10733679)
I'll just add this on: https://www.cs.cmu.edu/~fp/courses/15411-f14/schedule.html

The lecture notes are simple and excellent, though at a very high level of abstraction. Though most of the notes are full of references to the original material, which is super nice.