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(grokdeclarator): Use signed version of `sizetype' for type of array

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index.

From-SVN: r6822
This commit is contained in:
Richard Kenner 1994-03-19 06:29:25 -05:00
parent 79c844cdca
commit 1ff1a2d220
1 changed files with 6 additions and 3 deletions
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9
gcc/c-decl.c
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@ -4220,6 +4220,8 @@ grokdeclarator (declarator, declspecs, decl_context, initialized)
register tree size = TREE_OPERAND (declarator, 1);
/* An uninitialized decl with `extern' is a reference. */
int extern_ref = !initialized && (specbits & (1 << (int) RID_EXTERN));
/* The index is a signed object `sizetype' bits wide. */
tree index_type = signed_type (sizetype);
declarator = TREE_OPERAND (declarator, 0);
@ -4292,10 +4294,11 @@ grokdeclarator (declarator, declspecs, decl_context, initialized)
}
}
/* Convert size to sizetype, so that if it is a variable
/* Convert size to index_type, so that if it is a variable
the computations will be done in the proper mode. */
itype = fold (build (MINUS_EXPR, sizetype,
convert (sizetype, size), size_one_node));
itype = fold (build (MINUS_EXPR, index_type,
convert (index_type, size),
convert (index_type, size_one_node)));
if (size_varies)
itype = variable_size (itype);