[pypy-issue] Issue #3135: Compiler warnings when translating (pypy/pypy)

mattip issues-reply at bitbucket.org
Tue Dec 24 03:33:20 EST 2019

New issue 3135: Compiler warnings when translating


There are many warnings when translating. 


This one \(one example of tens of such warnings\)

[platform:WARNING] rpython_rlib_4.c: In function ‘pypy_g_TimSort_merge_collapse_13’:
[platform:WARNING] /<path>/pypy/rpython/translator/c/src/int.h:32:30: warning: assuming \
        signed overflow does not occur when assuming that (X - c) <= X is always true \
[platform:WARNING]  #define OP_INT_LT(x,y,r)   r = ((x) <  (y))
[platform:WARNING] rpython_rlib_4.c:9390:4: note: in expansion of macro ‘OP_INT_LT’
[platform:WARNING]     OP_INT_LT(l_index_11327, l_v2221820, l_v2221848);

is strange. All the values are `Signed` which is `long`. When I try to [replicate with godbolt](https://godbolt.org/z/u-cBQw), I do not get that warning

We also discard `const` qualifiers when accessing a struct field:

platform:WARNING] pypy_module_time.c: In function ‘pypy_g__init_timezone’:
[platform:WARNING] pypy_module_time.c:370:11: warning: assignment discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
[platform:WARNING]   l_cp_134 = RPyField(l_res_2143, tm_zone);

There are many more warnings, but these overshadow the other warnings.

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