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| author | Simon Marchi <simon.marchi@ericsson.com> | 2017-10-30 14:27:30 -0400 |
|---|---|---|
| committer | Simon Marchi <simon.marchi@ericsson.com> | 2017-10-30 14:27:38 -0400 |
| commit | b020ff8074af22639e3f3c0f700f45d067521249 (patch) | |
| tree | 52a5dcc3bd2b298e814b8f43c74d6aeac22edced /gdb/common | |
| parent | 1b81856f5b00e7ba860e4de2f3a426f342327165 (diff) | |
| download | gdb-b020ff8074af22639e3f3c0f700f45d067521249.zip gdb-b020ff8074af22639e3f3c0f700f45d067521249.tar.gz gdb-b020ff8074af22639e3f3c0f700f45d067521249.tar.bz2 | |
Introduce in_inclusive_range, fix -Wtautological-compare warnings
When compiling with clang or gcc 8, we see warnings like this:
/home/emaisin/src/binutils-gdb/gdb/arm-tdep.c:10013:13: error: comparison of 0 <= unsigned expression is always true [-Werror,-Wtautological-compare]
if (0 <= insn_op1 && 3 >= insn_op1)
~ ^ ~~~~~~~~
/home/emaisin/src/binutils-gdb/gdb/arm-tdep.c:11722:20: error: comparison of unsigned expression >= 0 is always true [-Werror,-Wtautological-compare]
else if (opB >= 0 && opB <= 2)
~~~ ^ ~
This is because an unsigned integer (opB in this case) will always be >=
0. It is still useful to keep both bounds of the range in the
expression, even if one is at the edge of the data type range. This
patch introduces a utility function in_inclusive_range that gets rid of
the warning while conveying that we are checking for a range.
Tested by rebuilding.
gdb/ChangeLog:
* common/common-utils.h (in_inclusive_range): New function.
* arm-tdep.c (arm_record_extension_space): Use
in_inclusive_range.
(thumb_record_ld_st_reg_offset): Use in_inclusive_range.
* cris-tdep.c (cris_spec_reg_applicable): Use
in_inclusive_range.
Diffstat (limited to 'gdb/common')
| -rw-r--r-- | gdb/common/common-utils.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gdb/common/common-utils.h b/gdb/common/common-utils.h index a32863c..4926a32 100644 --- a/gdb/common/common-utils.h +++ b/gdb/common/common-utils.h @@ -125,4 +125,13 @@ extern void free_vector_argv (std::vector<char *> &v); joining all the arguments with a whitespace separating them. */ extern std::string stringify_argv (const std::vector<char *> &argv); +/* Return true if VALUE is in [LOW, HIGH]. */ + +template <typename T> +static bool +in_inclusive_range (T value, T low, T high) +{ + return value >= low && value <= high; +} + #endif |