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Evaluate expressions that delimit GCC switch/case ranges #2490

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Merged
merged 1 commit into from
Jul 3, 2018
Merged

Evaluate expressions that delimit GCC switch/case ranges #2490

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32 changes: 32 additions & 0 deletions regression/cbmc/gcc_switch_case_range2/main.c
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Original file line number Diff line number Diff line change
@@ -0,0 +1,32 @@
typedef enum
{
VALUE_1,
VALUE_2,
VALUE_3,
VALUE_4
} values;

int main()
{
unsigned x;
switch(x)
{
case VALUE_1:
__CPROVER_assert(0, "0 works");
break;
#ifdef __GNUC__
case VALUE_2 ... 3:
#else
case VALUE_2:
case VALUE_3:
case VALUE_4:
#endif
__CPROVER_assert(0, "... works");
break;
default:
__CPROVER_assert(0, "default works");
break;
}

return 0;
}
9 changes: 9 additions & 0 deletions regression/cbmc/gcc_switch_case_range2/test.desc
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@@ -0,0 +1,9 @@
CORE
main.c

^EXIT=10$
^SIGNAL=0$
^VERIFICATION FAILED$
^\*\* 3 of 3 failed
--
^warning: ignoring
3 changes: 3 additions & 0 deletions src/ansi-c/c_typecheck_code.cpp
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Expand Up @@ -535,6 +535,7 @@ void c_typecheck_baset::typecheck_switch_case(code_switch_caset &code)
exprt &case_expr=code.case_op();
typecheck_expr(case_expr);
implicit_typecast(case_expr, switch_op_type);
make_constant(case_expr);
}
}

Expand All @@ -561,6 +562,8 @@ void c_typecheck_baset::typecheck_gcc_switch_case_range(codet &code)
typecheck_expr(code.op1());
implicit_typecast(code.op0(), switch_op_type);
implicit_typecast(code.op1(), switch_op_type);
make_constant(code.op0());
make_constant(code.op1());
}

void c_typecheck_baset::typecheck_gcc_local_label(codet &code)
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