scc

simple c99 compiler
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commit dd69378b91c35a62d9e2960fbad9ae11e4a06ec4
parent 113195c2eace9d4fedf6e1a14cd9b6946b51d65d
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Tue, 27 Sep 2016 17:04:49 +0200

[cc1] Fix definition of union types

The size of unions was always wrong (and 0). This patch
also fixes the offset of fields in unions, which must
be 0 always.

Diffstat:
Mcc1/types.c | 9+++++----
1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/cc1/types.c b/cc1/types.c @@ -176,7 +176,7 @@ typesize(Type *tp) { Symbol **sp; Type *aux; - unsigned long size; + unsigned long size, offset; int align, a; TINT n; @@ -200,10 +200,10 @@ typesize(Type *tp) * field, and the size of a struct is the sum * of the size of every field plus padding bits. */ - align = size = 0; + offset = align = size = 0; n = tp->n.elem; for (sp = tp->p.fields; n--; ++sp) { - (*sp)->u.i = size; + (*sp)->u.i = offset; aux = (*sp)->type; a = aux->align; if (a > align) @@ -212,8 +212,9 @@ typesize(Type *tp) if (--a != 0) size += (size + a) & ~a; size += aux->size; + offset = size; } else { - if (tp->size > size) + if ((*sp)->type->size > size) size = aux->size; } }