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Fix bit field bug

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This commit is contained in:
Ginger Bill
2017-06-08 16:29:05 +01:00
parent 5cad7d44a6
commit af2736daec
3 changed files with 78 additions and 33 deletions
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src/ir.cpp
+4 -2
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@@ -1902,12 +1902,14 @@ irValue *ir_addr_load(irProcedure *proc, irAddr addr) {
return v;
}
GB_ASSERT(8 > bit_inset);
irValue *shift_amount = ir_value_constant(a, int_type, exact_value_i64(bit_inset));
irValue *first_byte = ir_emit_load(proc, bytes);
irValue *res = ir_emit_arith(proc, Token_Shr, first_byte, ir_const_int(a, 8 - bit_inset), int_type);
irValue *res = ir_emit_arith(proc, Token_Shr, first_byte, shift_amount, int_type);
irValue *remaining_bytes = ir_emit_load(proc, ir_emit_conv(proc, ir_emit_ptr_offset(proc, bytes, v_one), int_ptr));
remaining_bytes = ir_emit_arith(proc, Token_Shl, remaining_bytes, ir_const_int(a, bit_inset), int_type);
remaining_bytes = ir_emit_arith(proc, Token_Shl, remaining_bytes, shift_amount, int_type);
return ir_emit_arith(proc, Token_Or, res, remaining_bytes, int_type);
}