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test for bitfield promotion #3713

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Merged
merged 2 commits into from
Jan 8, 2019
Merged

test for bitfield promotion #3713

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9213145
Enable compilation of test with gcc/clang
Jan 8, 2019
935a2eb
test for bit-field promotion (#3709)
Jan 8, 2019
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15 changes: 11 additions & 4 deletions regression/cbmc/Bitfields1/main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -8,10 +8,10 @@ typedef enum _INTEL_CACHE_TYPE {
} INTEL_CACHE_TYPE;

struct bft {
unsigned int a:3;
unsigned long int a : 3;
unsigned int b:1;
signed int c:2;
_Bool d:3;
_Bool d : 1;

// an anonymous bitfield
signed int :2;
Expand All @@ -20,7 +20,7 @@ struct bft {
INT x:1;

// made of sizeof
unsigned int abc: sizeof(int);
unsigned int abc : sizeof(int) * 8;

// enums are integers!
INTEL_CACHE_TYPE Type : 5;
Expand Down Expand Up @@ -53,7 +53,14 @@ int main() {

// assignments have the underlying type
assert(sizeof(bf.d=1)==sizeof(_Bool));
assert(sizeof(bf.a+=1)==sizeof(unsigned));
assert(sizeof(bf.a += 1) == sizeof(unsigned long));

bf.Type=IntelCacheTrace;

// promotion rules apply, and thus, bf.a is signed,
// but bf.abc is unsigned
bf.a = 0;
assert(bf.a - 1 < 0);
bf.abc = 0;
assert(bf.abc - 1 >= 0);
}
2 changes: 1 addition & 1 deletion regression/cbmc/Bitfields1/test.desc
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@@ -1,4 +1,4 @@
CORE
KNOWNBUG
main.c

^EXIT=0$
Expand Down