[sdcc-devel] [ sdcc-Bugs-2942247 ] Arrays of _Bool are very broken

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Bugs item #2942247, was opened at 2010-01-29 14:47
Message generated for change (Comment added) made by spth
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Philipp Krause (spth)
Assigned to: Nobody/Anonymous (nobody)
Summary: Arrays of _Bool are very broken

Initial Comment:
Unfortunately my implementation of _Bool recently added to sdcc is broken. Fortunately it seems there is only one broken aspect, but that one is really broken: Arrays of _Bool.

Three problems:

1) Global arrays of _Bool are not correctly initialized, i.e. the initializers are not cast to _Bool:

const _Bool foo[2] = {1, 2};

will store 2 in foo[2] isntead of one (same problem for non-const array.

2) Accesses to the array access the array's address instead, i.e. reading foo[1] generates code to read the upper byte of foo's address.

3) Lokal definitions of arrays of _Bool with initializers crash the compiler.

Philipp

The attached file shows the problems, I tired compiling with sdcc --std-c99 -mz80

These bugs are not located in a backend.

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>Comment By: Philipp Krause (spth)
Date: 2010-01-29 17:22

Message:
This shall be a bug report about just problems 2) and 3).

Upon closer investigation problem 1) is different: It does not affect
const arrays of bool and it does affect arrays of type other than bool.
I'll file a separate bug report about that one.

Philipp


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