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Xavier Leroy authored
The size (number of elements) of an array type is represented as an OCaml int64 in the parse tree, and as a Coq Z in the CompCert C AST. However, the C2C.convertInt function used to do this conversion produces a Coq int (32 bits) type, taking the array size modulo 2^32. This is not correct, esp. on a 64-bit target. This commit refactors C2C around three integer conversion functions: convertInt32 producing a Coq "int" (32 bit) convertInt64 producing a Coq "int64" (64 bit) convertIntZ producing a Coq "Z" (arbitrary precision)
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