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Fix bitfield loads into char/short.

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Removes a premature optimization of char/short loads
rewriting the source type.  It did so also for bitfield
loads, thereby removing all the shifts/maskings.
This commit is contained in:
Michael Matz
2012-04-15 01:06:46 +02:00
parent 6471ec0a2b
commit 5c0a2366a3
2 changed files with 8 additions and 2 deletions
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5
tccgen.c
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@ -2320,8 +2320,9 @@ ST_FUNC void vstore(void)
ft = vtop[-1].type.t;
sbt = vtop->type.t & VT_BTYPE;
dbt = ft & VT_BTYPE;
if (((sbt == VT_INT || sbt == VT_SHORT) && dbt == VT_BYTE) ||
(sbt == VT_INT && dbt == VT_SHORT)) {
if ((((sbt == VT_INT || sbt == VT_SHORT) && dbt == VT_BYTE) ||
(sbt == VT_INT && dbt == VT_SHORT))
&& !(vtop->type.t & VT_BITFIELD)) {
/* optimize char/short casts */
delayed_cast = VT_MUSTCAST;
vtop->type.t = ft & (VT_TYPE & ~(VT_BITFIELD | (-1 << VT_STRUCT_SHIFT)));