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Make ctx_diff aware of mappings

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John Hawthorn 2021-07-27 23:35:01 -07:00 committed by Alan Wu
parent 6c80150d40
commit 250b97da9b
1 changed files with 16 additions and 3 deletions
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19
yjit_core.c
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@ -355,9 +355,22 @@ int ctx_diff(const ctx_t* src, const ctx_t* dst)
// For each value on the temp stack
for (size_t i = 0; i < src->stack_size; ++i)
{
val_type_t t_src = ctx_get_opnd_type(src, OPND_STACK(i));
val_type_t t_dst = ctx_get_opnd_type(dst, OPND_STACK(i));
int temp_diff = type_diff(t_src, t_dst);
temp_type_mapping_t m_src = ctx_get_opnd_mapping(src, OPND_STACK(i));
temp_type_mapping_t m_dst = ctx_get_opnd_mapping(dst, OPND_STACK(i));
if (m_dst.mapping.kind != m_src.mapping.kind) {
if (m_dst.mapping.kind == TEMP_STACK) {
// We can safely drop information about the source of the temp
// stack operand.
diff += 1;
} else {
return INT_MAX;
}
} else if (m_dst.mapping.idx != m_src.mapping.idx) {
return INT_MAX;
}
int temp_diff = type_diff(m_src.type, m_dst.type);
if (temp_diff == INT_MAX)
return INT_MAX;