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Warn about backwards FOR loops with -Wbackwards-for (-Wall)

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Fixes #816
This commit is contained in:
Rangi
2021-03-31 10:00:21 -04:00
parent 3741bd4617
commit 49aac2961d
6 changed files with 29 additions and 6 deletions
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10
src/asm/rgbasm.1
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@@ -189,7 +189,7 @@ Ignoring the
prefix, entries are listed alphabetically.
.Bl -tag -width Ds
.It Fl Wno-assert
Warns when
Warn when
.Ic WARN Ns No -type
assertions fail. (See
.Dq Aborting the assembly process
@@ -197,6 +197,12 @@ in
.Xr rgbasm 5
for
.Ic ASSERT ) .
.It Fl Wbackwards-for
Warn when
.Ic FOR
loops have their start and stop values switched according to the step value.
This warning is enabled by
.Fl Wall .
.It Fl Wbuiltin-args
Warn about incorrect arguments to built-in functions, such as
.Fn STRSUB
@@ -239,7 +245,7 @@ constant or
directive are encountered.
.It Fl Wshift
Warn when shifting right a negative value.
Use a division by 2^N instead.
Use a division by 2**N instead.
.It Fl Wshift-amount
Warn when a shift's operand is negative or greater than 32.
.It Fl Wno-truncation