From d2c7d391c8b69a6a590a2f702ed58bea033f6325 Mon Sep 17 00:00:00 2001 From: Dmitry Atamanov Date: Sat, 28 Oct 2017 10:25:56 +0300 Subject: TinyC upgrade (#6593) --- tinyc/tests/tests2/92_enum_bitfield.c | 57 +++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 tinyc/tests/tests2/92_enum_bitfield.c (limited to 'tinyc/tests/tests2/92_enum_bitfield.c') diff --git a/tinyc/tests/tests2/92_enum_bitfield.c b/tinyc/tests/tests2/92_enum_bitfield.c new file mode 100644 index 000000000..bb6dc35d2 --- /dev/null +++ b/tinyc/tests/tests2/92_enum_bitfield.c @@ -0,0 +1,57 @@ +/* This checks if enums needing 8 bit but only having positive + values are correctly zero extended (instead of sign extended) + when stored into/loaded from a 8 bit bit-field of enum type (which + itself is implementation defined, so isn't necessarily supported by all + other compilers). */ +enum tree_code { + SOME_CODE = 148, /* has bit 7 set, and hence all further enum values as well */ + LAST_AND_UNUSED_TREE_CODE +}; +typedef union tree_node *tree; +struct tree_common +{ + union tree_node *chain; + union tree_node *type; + enum tree_code code : 8; + unsigned side_effects_flag : 1; +}; +union tree_node +{ + struct tree_common common; + }; +enum c_tree_code { + C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE, + STMT_EXPR, + LAST_C_TREE_CODE +}; +enum cplus_tree_code { + CP_DUMMY_TREE_CODE = LAST_C_TREE_CODE, + AMBIG_CONV, + LAST_CPLUS_TREE_CODE +}; + +extern int printf(const char *, ...); +int blah(){return 0;} + +int convert_like_real (tree convs) +{ + switch (((enum tree_code) (convs)->common.code)) + { + case AMBIG_CONV: /* This has bit 7 set, which must not be the sign + bit in tree_common.code, i.e. the bitfield must + be somehow marked unsigned. */ + return blah(); + default: + break; + }; + printf("unsigned enum bit-fields broken\n"); +} + +int main() +{ + union tree_node convs; + + convs.common.code = AMBIG_CONV; + convert_like_real (&convs); + return 0; +} -- cgit 1.4.1-2-gfad0