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Release 1.8
===========
+- More faithful semantics for volatile accesses:
+ . volatile reads and writes from a volatile global variable are treated
+ like input and output system calls (respectively), bypassing
+ the memory model entirely;
+ . volatile reads and writes from other locations are treated like
+ regular loads and stores.
+
- Added "fabs" (floating-point absolute value) unary operator to Clight;
map __builtin_fabs() to this operator.