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tccgen.c: Remove undefined shift of negative signed value.

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This commit is contained in:
Edmund Grimley Evans 2015-10-15 19:02:57 +01:00
parent eafd7a7d3b
commit c899659d39
1 changed files with 4 additions and 3 deletions
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7
tccgen.c
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@ -742,7 +742,7 @@ ST_FUNC int gv(int rc)
bit_pos = (vtop->type.t >> VT_STRUCT_SHIFT) & 0x3f;
bit_size = (vtop->type.t >> (VT_STRUCT_SHIFT + 6)) & 0x3f;
/* remove bit field info to avoid loops */
vtop->type.t &= ~(VT_BITFIELD | (-1 << VT_STRUCT_SHIFT));
vtop->type.t &= ~VT_BITFIELD & ((1 << VT_STRUCT_SHIFT) - 1);
/* cast to int to propagate signedness in following ops */
if ((vtop->type.t & VT_BTYPE) == VT_LLONG) {
type.t = VT_LLONG;
@ -2545,7 +2545,8 @@ ST_FUNC void vstore(void)
&& !(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)));
vtop->type.t = (ft & VT_TYPE & ~VT_BITFIELD &
((1 << VT_STRUCT_SHIFT) - 1));
/* XXX: factorize */
if (ft & VT_CONSTANT)
tcc_warning("assignment of read-only location");
@ -2599,7 +2600,7 @@ ST_FUNC void vstore(void)
bit_pos = (ft >> VT_STRUCT_SHIFT) & 0x3f;
bit_size = (ft >> (VT_STRUCT_SHIFT + 6)) & 0x3f;
/* remove bit field info to avoid loops */
vtop[-1].type.t = ft & ~(VT_BITFIELD | (-1 << VT_STRUCT_SHIFT));
vtop[-1].type.t = ft & ~VT_BITFIELD & ((1 << VT_STRUCT_SHIFT) - 1);
if((ft & VT_BTYPE) == VT_BOOL) {
gen_cast(&vtop[-1].type);