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Remove bounds checks for slice expressions with both indices empty

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This commit is contained in:
gingerBill
2019-03-25 21:00:45 +00:00
parent c785c3569f
commit 4a15689776
1 changed files with 12 additions and 4 deletions
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src/ir.cpp
+12 -4
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@@ -7186,7 +7186,9 @@ irAddr ir_build_addr(irProcedure *proc, Ast *expr) {
irValue *len = ir_slice_len(proc, base); irValue *len = ir_slice_len(proc, base);
if (high == nullptr) high = len; if (high == nullptr) high = len;
ir_emit_slice_bounds_check(proc, se->open, low, high, len, false); if (se->low != nullptr || se->high != nullptr) {
ir_emit_slice_bounds_check(proc, se->open, low, high, len, false);
}
irValue *elem = ir_emit_ptr_offset(proc, ir_slice_elem(proc, base), low); irValue *elem = ir_emit_ptr_offset(proc, ir_slice_elem(proc, base), low);
irValue *new_len = ir_emit_arith(proc, Token_Sub, high, low, t_int); irValue *new_len = ir_emit_arith(proc, Token_Sub, high, low, t_int);
@@ -7203,7 +7205,9 @@ irAddr ir_build_addr(irProcedure *proc, Ast *expr) {
irValue *len = ir_dynamic_array_len(proc, base); irValue *len = ir_dynamic_array_len(proc, base);
if (high == nullptr) high = len; if (high == nullptr) high = len;
ir_emit_slice_bounds_check(proc, se->open, low, high, len, false); if (se->low != nullptr || se->high != nullptr) {
ir_emit_slice_bounds_check(proc, se->open, low, high, len, false);
}
irValue *elem = ir_emit_ptr_offset(proc, ir_dynamic_array_elem(proc, base), low); irValue *elem = ir_emit_ptr_offset(proc, ir_dynamic_array_elem(proc, base), low);
irValue *new_len = ir_emit_arith(proc, Token_Sub, high, low, t_int); irValue *new_len = ir_emit_arith(proc, Token_Sub, high, low, t_int);
@@ -7224,7 +7228,9 @@ irAddr ir_build_addr(irProcedure *proc, Ast *expr) {
bool high_const = type_and_value_of_expr(se->high).mode == Addressing_Constant; bool high_const = type_and_value_of_expr(se->high).mode == Addressing_Constant;
if (!low_const || !high_const) { if (!low_const || !high_const) {
ir_emit_slice_bounds_check(proc, se->open, low, high, len, false); if (se->low != nullptr || se->high != nullptr) {
ir_emit_slice_bounds_check(proc, se->open, low, high, len, false);
}
} }
irValue *elem = ir_emit_ptr_offset(proc, ir_array_elem(proc, addr), low); irValue *elem = ir_emit_ptr_offset(proc, ir_array_elem(proc, addr), low);
irValue *new_len = ir_emit_arith(proc, Token_Sub, high, low, t_int); irValue *new_len = ir_emit_arith(proc, Token_Sub, high, low, t_int);
@@ -7240,7 +7246,9 @@ irAddr ir_build_addr(irProcedure *proc, Ast *expr) {
if (high == nullptr) high = len; if (high == nullptr) high = len;
// if (max == nullptr) max = ir_string_len(proc, base); // if (max == nullptr) max = ir_string_len(proc, base);
ir_emit_slice_bounds_check(proc, se->open, low, high, len, true); if (se->low != nullptr || se->high != nullptr) {
ir_emit_slice_bounds_check(proc, se->open, low, high, len, true);
}
irValue *elem = ir_emit_ptr_offset(proc, ir_string_elem(proc, base), low); irValue *elem = ir_emit_ptr_offset(proc, ir_string_elem(proc, base), low);
irValue *new_len = ir_emit_arith(proc, Token_Sub, high, low, t_int); irValue *new_len = ir_emit_arith(proc, Token_Sub, high, low, t_int);