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"Maybe-fy" operator

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This commit is contained in:
Ginger Bill
2016-10-08 10:01:29 +01:00
parent c5d20d2eef
commit a5c6340316
5 changed files with 46 additions and 27 deletions
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src/codegen/ssa.cpp
+15 -13
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@@ -2099,24 +2099,26 @@ ssaValue *ssa_build_single_expr(ssaProcedure *proc, AstNode *expr, TypeAndValue
case_ast_node(ue, UnaryExpr, expr);
switch (ue->op.kind) {
case Token_Pointer: {
return ssa_emit_zero_gep(proc, ssa_build_addr(proc, ue->expr).addr);
}
case Token_Pointer:
return ssa_emit_zero_gep(proc, ssa_build_addr(proc, ue->expr).addr); // Make a copy of the pointer
case Token_Maybe:
return ssa_emit_conv(proc, ssa_build_expr(proc, ue->expr), type_of_expr(proc->module->info, expr));
case Token_Add:
return ssa_build_expr(proc, ue->expr);
case Token_Sub: {
// NOTE(bill): -`x` == 0 - `x`
ssaValue *left = v_zero;
ssaValue *right = ssa_build_expr(proc, ue->expr);
return ssa_emit_arith(proc, ue->op, left, right, tv->type);
} break;
case Token_Not: // Boolean not
case Token_Sub: // NOTE(bill): -`x` == 0 - `x`
return ssa_emit_arith(proc, ue->op, v_zero, ssa_build_expr(proc, ue->expr), tv->type);
case Token_Not: // Boolean not
case Token_Xor: { // Bitwise not
// NOTE(bill): "not" `x` == `x` "xor" `-1`
ExactValue neg_one = make_exact_value_integer(-1);
ssaValue *left = ssa_build_expr(proc, ue->expr);
ssaValue *right = ssa_add_module_constant(proc->module, tv->type, neg_one);
return ssa_emit_arith(proc, ue->op, left, right, tv->type);
ssaValue *right = ssa_add_module_constant(proc->module, tv->type, make_exact_value_integer(-1));
return ssa_emit_arith(proc, ue->op,
left, right,
tv->type);
} break;
}
case_end;