Compiler books

Hi all,

I currently own the following books:

"Advanced compiler design & implementation", Steven S. Muchnick
"Engineering a compiler", Keith D. Cooper & Linda Torczon
"Compiler design in C", Allen Holub.

I would like to have your suggestions. I'm looking for a compiler book
with emphasis on instruction selection & register allocation.
Specifically, for generating code from C expressions.

Regards,

mf
[If you just want to compile expressions, Holub should be the most directly
useful, so long as you get a copy of the enormous errata *** and note all
of the errors in the text. -John]
.