mirror of
https://bitbucket.org/CPMADevs/cnq3
synced 2024-11-30 15:52:16 +00:00
91 lines
3.1 KiB
Text
91 lines
3.1 KiB
Text
From lcc 4.0 to 4.1:
|
|
|
|
Changes:
|
|
|
|
See doc/4.html for changes in the code-generation interface.
|
|
|
|
Warns about constants that are too large, eg, short x = 70000;
|
|
|
|
Warns about expressions that have no effect.
|
|
|
|
Unsigned shorts are now used for wide-character constants, and
|
|
wchar_t is a typedef for unsigned short.
|
|
|
|
More assertions in gen.c to confirm that the register allocator is
|
|
configured correctly; ie, that the various masks, wildcards,
|
|
clobbers, and targets are internally consistent. Full checking
|
|
appears impractical, but there's still more than than there was
|
|
before.
|
|
|
|
On the SPARC, lcc now emits .type and .size directives
|
|
unconditionally.
|
|
|
|
On the x86, constants are now emitted into the text segment.
|
|
|
|
If the environment variable "LCCDIR" is defined, it gives the directory
|
|
that contains the preprocessor, the compiler proper, and the
|
|
lcc-specific libraries.
|
|
|
|
Under Windows, lcc searches the directories named in the environment
|
|
variable "include" for header files.
|
|
|
|
Errors fixed:
|
|
|
|
Erroneously complained about unknown sizes for some const fields, eg,
|
|
typedef struct foo ref; struct foo { const ref *q; int a; };
|
|
f(ref *p, int i) { return p->q[i].a; }
|
|
|
|
-A -A erroneously complained about static main's that didn't conform
|
|
to the ANSI-mandated "int main(void)" or "int main(int, char **)".
|
|
|
|
Silently generated incorrect code for a structure copy with a
|
|
post-incremented target, eg,
|
|
struct { int x; } data = {1}, copy[2], *q = copy;
|
|
main() { *q++ = data; }
|
|
|
|
Generated incorrect values in some expressions with constant pointers.
|
|
|
|
Silently truncated string literals longer than 4095 characters.
|
|
|
|
Failed to emit debugging information for uninitialized globals.
|
|
|
|
Failed to diagnose missing sizes in some multi-dimensioned array
|
|
declarators, eg, extern int x[][10]; int x[5][];
|
|
|
|
Silently emitted incorrect sizes and initalizations for some
|
|
incomplete multi-dimensioned arrays involving pointers and whose size
|
|
is determined by the number of initializers.
|
|
|
|
Set only the x.name field for some back-end symbols (eg, wildcards),
|
|
and the uninitialized name field crashed some debugging output.
|
|
|
|
uses() failed to check the register *set* as well as the register
|
|
mask. There's no known bug demo, but a wildcard set might be
|
|
contrived that would need the test.
|
|
|
|
Crashed with -b on some conditional expressions involving calls, eg,
|
|
int p; void g(void) { p ? f() : 1; }
|
|
|
|
On the MIPS, sometimes generated an incorrect frame size and thus a
|
|
crash when floating-point registers were saved.
|
|
|
|
On the SPARC, erroneously reused a register variable as a temporary
|
|
when the variable is compiler-generated.
|
|
|
|
On the SPARC with -b, emitted incorrect code for returning structs.
|
|
|
|
On the x86, conversion from float to int rounded instead of truncated
|
|
with the default floating-point mode.
|
|
|
|
On the x86, eliminate rtargets for kids after the first (see p. 419).
|
|
|
|
On the x86, substitute reg for freg, in order to use the common reg
|
|
rules. Needed only for debugging output, since we're not using any
|
|
float regs as regs at this time.
|
|
|
|
On the x86, "double f(); main(){f();}" wasn't popping the FP register stack.
|
|
|
|
On the x86, ECX was saved by the callee, when it should have been
|
|
saved by the caller.
|
|
|
|
$Id: LOG 145 2001-10-17 21:53:10Z timo $
|