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parsec supports bitshift operators

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This commit is contained in:
Josh Wolfe 2017-11-13 20:49:53 -07:00
parent 6356724057
commit c1fde0e8c4
2 changed files with 27 additions and 4 deletions
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21
src/parsec.cpp
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@ -987,6 +987,21 @@ static AstNode *trans_create_assign(Context *c, bool result_used, AstNode *block
}
}
static AstNode *trans_create_shift_op(Context *c, AstNode *block, QualType result_type, Expr *lhs_expr, BinOpType bin_op, Expr *rhs_expr) {
const SourceLocation &rhs_location = rhs_expr->getLocStart();
AstNode *rhs_type = qual_type_to_log2_int_ref(c, result_type, rhs_location);
// lhs >> u5(rh)
AstNode *lhs = trans_expr(c, true, block, lhs_expr, TransLValue);
if (lhs == nullptr) return nullptr;
AstNode *rhs = trans_expr(c, true, block, rhs_expr, TransRValue);
if (rhs == nullptr) return nullptr;
AstNode *coerced_rhs = trans_create_node_fn_call_1(c, rhs_type, rhs);
return trans_create_node_bin_op(c, lhs, bin_op, coerced_rhs);
}
static AstNode *trans_binary_operator(Context *c, bool result_used, AstNode *block, BinaryOperator *stmt) {
switch (stmt->getOpcode()) {
case BO_PtrMemD:
@ -1038,11 +1053,9 @@ static AstNode *trans_binary_operator(Context *c, bool result_used, AstNode *blo
qual_type_has_wrapping_overflow(c, stmt->getType()) ? BinOpTypeSubWrap : BinOpTypeSub,
stmt->getRHS());
case BO_Shl:
emit_warning(c, stmt->getLocStart(), "TODO handle more C binary operators: BO_Shl");
return nullptr;
return trans_create_shift_op(c, block, stmt->getType(), stmt->getLHS(), BinOpTypeBitShiftLeft, stmt->getRHS());
case BO_Shr:
emit_warning(c, stmt->getLocStart(), "TODO handle more C binary operators: BO_Shr");
return nullptr;
return trans_create_shift_op(c, block, stmt->getType(), stmt->getLHS(), BinOpTypeBitShiftRight, stmt->getRHS());
case BO_LT:
return trans_create_bin_op(c, block, stmt->getLHS(), BinOpTypeCmpLessThan, stmt->getRHS());
case BO_GT:

10
test/parsec.zig
View File

@ -620,6 +620,16 @@ pub fn addCases(cases: &tests.ParseCContext) {
\\}
);
cases.addC("bitshift",
\\int foo(void) {
\\ return (1 << 2) >> 1;
\\}
,
\\export fn foo() -> c_int {
\\ return (1 << @import("std").math.Log2Int(c_int)(2)) >> @import("std").math.Log2Int(c_int)(1);
\\}
);
cases.addC("duplicate typedef",
\\typedef long foo;
\\typedef int bar;