diff options
Diffstat (limited to 'lcc/LOG')
| -rwxr-xr-x | lcc/LOG | 182 |
1 files changed, 91 insertions, 91 deletions
@@ -1,91 +1,91 @@ -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 $
+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 $ |