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e70a5406ad
If --warn-simple-code is enabled, then emit a warning for comparisons of
unsigned integer values against zero if that comparison is a tautology or
contradiction.
compiler/simplify_goal_call.m:
Implement the new warning.
tests/warnings/Mmakefile:
tests/warnings/unsigned_zero_cmp.{m,exp}:
Add a test of the new warning.
47 lines
2.8 KiB
Plaintext
47 lines
2.8 KiB
Plaintext
unsigned_zero_cmp.m:028: Warning: call to predicate `uint.<'/2 cannot succeed.
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unsigned_zero_cmp.m:028: There are no uint values < 0u.
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unsigned_zero_cmp.m:029: Warning: call to predicate `uint.>'/2 cannot succeed.
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unsigned_zero_cmp.m:029: 0u > no uint values.
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unsigned_zero_cmp.m:030: Warning: call to predicate `uint.=<'/2 cannot fail.
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unsigned_zero_cmp.m:030: 0u =< all uint values.
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unsigned_zero_cmp.m:031: Warning: call to predicate `uint.>='/2 cannot fail.
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unsigned_zero_cmp.m:031: All uint values are >= 0u.
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unsigned_zero_cmp.m:034: Warning: call to predicate `uint8.<'/2 cannot succeed.
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unsigned_zero_cmp.m:034: There are no uint8 values < 0u8.
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unsigned_zero_cmp.m:035: Warning: call to predicate `uint8.>'/2 cannot succeed.
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unsigned_zero_cmp.m:035: 0u8 > no uint8 values.
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unsigned_zero_cmp.m:036: Warning: call to predicate `uint8.=<'/2 cannot fail.
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unsigned_zero_cmp.m:036: 0u8 =< all uint8 values.
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unsigned_zero_cmp.m:037: Warning: call to predicate `uint8.>='/2 cannot fail.
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unsigned_zero_cmp.m:037: All uint8 values are >= 0u8.
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unsigned_zero_cmp.m:040: Warning: call to predicate `uint16.<'/2 cannot
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unsigned_zero_cmp.m:040: succeed.
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unsigned_zero_cmp.m:040: There are no uint16 values < 0u16.
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unsigned_zero_cmp.m:041: Warning: call to predicate `uint16.>'/2 cannot
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unsigned_zero_cmp.m:041: succeed.
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unsigned_zero_cmp.m:041: 0u16 > no uint16 values.
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unsigned_zero_cmp.m:042: Warning: call to predicate `uint16.=<'/2 cannot fail.
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unsigned_zero_cmp.m:042: 0u16 =< all uint16 values.
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unsigned_zero_cmp.m:043: Warning: call to predicate `uint16.>='/2 cannot fail.
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unsigned_zero_cmp.m:043: All uint16 values are >= 0u16.
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unsigned_zero_cmp.m:046: Warning: call to predicate `uint32.<'/2 cannot
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unsigned_zero_cmp.m:046: succeed.
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unsigned_zero_cmp.m:046: There are no uint32 values < 0u32.
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unsigned_zero_cmp.m:047: Warning: call to predicate `uint32.>'/2 cannot
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unsigned_zero_cmp.m:047: succeed.
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unsigned_zero_cmp.m:047: 0u32 > no uint32 values.
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unsigned_zero_cmp.m:048: Warning: call to predicate `uint32.=<'/2 cannot fail.
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unsigned_zero_cmp.m:048: 0u32 =< all uint32 values.
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unsigned_zero_cmp.m:049: Warning: call to predicate `uint32.>='/2 cannot fail.
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unsigned_zero_cmp.m:049: All uint32 values are >= 0u32.
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unsigned_zero_cmp.m:052: Warning: call to predicate `uint64.<'/2 cannot
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unsigned_zero_cmp.m:052: succeed.
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unsigned_zero_cmp.m:052: There are no uint64 values < 0u64.
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unsigned_zero_cmp.m:053: Warning: call to predicate `uint64.>'/2 cannot
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unsigned_zero_cmp.m:053: succeed.
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unsigned_zero_cmp.m:053: 0u64 > no uint64 values.
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unsigned_zero_cmp.m:054: Warning: call to predicate `uint64.=<'/2 cannot fail.
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unsigned_zero_cmp.m:054: 0u64 =< all uint64 values.
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unsigned_zero_cmp.m:055: Warning: call to predicate `uint64.>='/2 cannot fail.
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unsigned_zero_cmp.m:055: All uint64 values are >= 0u64.
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