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Casts to integer used to be done with only 2 instructions:
OP_CAST & OP_SCAST.
Those are not very convenient as they don't reflect the real
operations that need to be done.
This patch specialize these instructions in:
- OP_TRUNC, for casts to a smaller type
- OP_ZEXT, for casts that need a zero extension
- OP_SEXT, for casts that need a sign extension
- Integer-to-integer casts of the same size are considered as
a NOPs and are, in fact, never emitted.
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
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Currently all casts to pointers are processed alike. This is
simple but rather unconvenient in later phases as this
correspond to different operations that obeys to different
rules and which later need extra checks.
Change this by using a specific instructions (OP_UTPTR) for
[unsigned] integer to pointers.
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
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Currently all casts to pointers are processed alike.
This is simple but rather unconvenient as it correspond to
different operations that obeys to different rules and
which later need extra checks.
Change this by using a specific instructions (OP_UTPTR) for
unsigned integer to pointers.
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
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Currently, casts from floats to integers are processed like
integers (or any other type) to integers. This is simple but
rather unconvenient as it correspond to different operations
that obeys to different rules and which later need extra checks.
Change this by directly using specific instructions:
- FCVTU for floats to unsigned integers
- FCVTS for floats to signed integers
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
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* merge the tests about implicit & explicit casts in a
single file as there was a lot of redundancy.
* shuffle the tests to linear/ or optim/
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
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