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Author SHA1 Message Date
Bill Currie
b18a744288 Use offset alias expressions 
They are not quite working yet as the operand generator does not use the
offset yet.
 2019-06-10 23:55:16 +09:00
Bill Currie
cc27949a34 Ensure pointer values always have a type 
The dags generator was creating a pointer value with no type which
caused print_statement to segfault.
 2019-06-10 23:52:39 +09:00
Bill Currie
ee1f5f9478 Add support for binary alias expressions 
Doesn't quite work yet.
 2019-06-10 23:48:58 +09:00
Bill Currie
913b9f52e0 Add an offset alias expression 
This should make dealing with def elements (vector etc) easier.
 2019-06-10 18:13:28 +09:00
Bill Currie
efdfc7436f Move ev_types into types.[ch] 
No wonder I couldn't find it the other day...
 2019-06-10 18:04:25 +09:00
Bill Currie
08ab42fc15 Handle vector expressions as sub-expressions 
Now my little game builds again :)
 2019-06-10 15:50:35 +09:00
Bill Currie
49ed4310fd Fix assigning int to enum or enum to int 
Or float, for v6 progs.
 2019-06-10 08:46:40 +09:00
Bill Currie
83fb588727 Support vector/quaternion division by float 
Implemented via v*(1/f) or q*(1/f) to give CSE a chance to optimize the
division if necessary as otherwise the engine would have to divide every
time.
 2019-06-10 08:44:36 +09:00
Bill Currie
7dc1a0640a Delay creating actual enum symbols 
In order to keep enumerator type and enum type the same, the values need
to have their type set after the enum type is finalized, and then the
appropriate symbols created in the parent scope. This fixes the infinite
recursion when assigning an enum value to its own type.
 2019-06-10 07:44:23 +09:00
Bill Currie
ef4ad52239 Make binary_expr fold constants 
This is where constant folding should have happened all along. While
unary_expr should fold constants too, it seems to already try to do so
and it's a bit much of a mess to clean up right now.
 2019-06-10 00:36:13 +09:00
Bill Currie
bf0543f7fb Be paranoid about temp var sizes 
Prevents array index errors.
 2019-06-10 00:19:48 +09:00
Bill Currie
28a2b96800 Implement automatic array sizing from initializer 2019-06-09 23:11:38 +09:00
Bill Currie
00f12263ca Fix casting arrays to pointers 2019-06-09 22:55:38 +09:00
Bill Currie
3196bcc851 Allow fold_constants to handle some math identities 
Such as x*0 -> 0, x*1 -> x, x+0 ->x, etc.
 2019-06-09 22:34:23 +09:00
Bill Currie
c98d1ff08c Document some problems with nil 
While he's a pretty cool character in HZD, he seems to have some
identity problems when in a compiler.
 2019-06-09 22:29:51 +09:00
Bill Currie
439cd15620 Do type promotion for short 
fold_constants used to do this when it was overly aggressive. Fixes the
ICE when accessing an array in a struct via a pointer.
 2019-06-09 22:27:53 +09:00
Bill Currie
227ac46ffe Clean up array expression processing 
And make sure constants are folded since fold_constants is no longer
recursive.
 2019-06-09 22:25:55 +09:00
Bill Currie
6253623e9b Remove some weird dereference code 
It appears to have been an attempt at optimizing dereferences, but it
instead just utterly mangled them.
 2019-06-09 21:37:46 +09:00
Bill Currie
f49303e774 Emit code for address expressions 
It helps if the necessary code is actually emitted in the first place.
 2019-06-09 21:37:46 +09:00
Bill Currie
8cef85e5de Cast scalar types when necessary on assignment 
This fixes type promotion errors that broke some tests.
 2019-06-09 20:12:50 +09:00
Bill Currie
e849c2d1ce Mark block expr result as rvalue when used as one 
At least for return. There may be other cases that need it, but this
fixes comma-expr.r (minus int->float promotion issues).
 2019-06-09 19:29:21 +09:00
Bill Currie
d9c9686288 Make initialized globals non-constant 
This is for modern code. Traditional code still treats initialized
globals as constant and nosave. This will make a bit of a mess of
modern code that expects traditional behavior.
 2019-06-09 19:23:23 +09:00
Bill Currie
b7b6a89b91 Simplify fold_constants 
While this does break automatic type promotion, it does stop
fold_constants recursing through complex expressions: only the top level
expression needs to be folded, and then only if both sides are actually
constant.
 2019-06-09 19:20:35 +09:00
Bill Currie
2ee36e8b99 Rename qfot_type_t.ty to meta 
When I did up a ruamoko implementation of a type encoding dumper, I
named the field meta, which feels much better than ty.
 2019-06-09 18:10:07 +09:00
Bill Currie
7fce68649a Implement comma expressions 
Doesn't quite work (attempt to suppress warning for return a = 3, 5;
failed).
 2019-06-09 16:56:20 +09:00
Bill Currie
689d1ad3ec Remove some debug prints 2019-06-09 16:45:01 +09:00
Bill Currie
33c2eb430f Stop bison complaining about %expect 
And make sure warnings get fixed.
 2019-06-09 16:19:27 +09:00
Bill Currie
ec89149b29 Build for loop decl inits correctly 
The multiple expressions are chained together and evaluate in left to
right order.
 2019-06-09 13:54:03 +09:00
Bill Currie
5bd3c8c985 Allow variable declarations in for loops 
Matches C, C++ and C#
 2019-06-08 21:52:17 +09:00
Bill Currie
be4c3a82a2 Detect redefinitions of structs and unions 
While the redefinition was being detected, it was misreported as the tag
being wrong, and on the wrong line, too.
 2019-06-08 19:25:25 +09:00
Bill Currie
f2102187b9 Clean up emit_protocol_list 
Now it uses emit_structure, which will make it easier should things go
wrong.
 2019-06-08 19:23:49 +09:00
Bill Currie
6acbdcb3e5 Correct a typo 2019-06-08 19:23:10 +09:00
Bill Currie
e217bdd55f Assign vector expressions to a temp for return 
Rather than direct to .return, allowing return of vector expressions
with function calls without trashing the vector.
 2019-06-08 13:36:03 +09:00
Bill Currie
ebab6574b9 Allow taking the address of a temporary variable 2019-06-08 13:35:47 +09:00
Bill Currie
e27da9c7db Avoid folding constants in assign_expr 
This prevents fold_constants from complaining about attempts to take
the address of a vector.
 2019-06-08 13:31:30 +09:00
Bill Currie
398e1cf83a Use output file as base for dot files 
Ensures the output goes not go into the source directory when using a
separate build tree.
 2019-06-08 13:30:06 +09:00
Bill Currie
4ef4a7e955 Start work on simple names in symbol tables 
I don't remember what the goal was (stopped working on it eight months
ago), but some possibilities include:
 - better handling of nil (have trouble with assigning into struts)
 - automatic forward declarations ala C# and jai (I was watching vids
   about jai at the time)
 - something for pascal
 - simply that the default symbol type should not be var (in which case,
   goal accomplished)
 2019-06-06 07:01:44 +09:00
Bill Currie
7e31704ebe Be more informative for pass by value size errors 2019-06-06 06:46:38 +09:00
Bill Currie
a5da8da1dc Be more informative for symbol type internal errors 2019-06-06 06:45:48 +09:00
Bill Currie
d00a2ef82d Convert constant vector expressions in binary expressions 
Fixes not being able to compare with eg [1, 2, 3]
 2019-06-06 06:44:19 +09:00
Bill Currie
319ecfbbfa Create a usable dot for vector expressions 
It leaves a lot to be desired, but it beats "FIXME".
 2019-06-06 06:42:31 +09:00
Bill Currie
607ec3124e More dead code removal. 
I have no idea why this hung around. It appears to be old array/struct
initialization.
 2018-10-15 22:12:40 +09:00
Bill Currie
ff5c1cd4c2 Clean up redundant type parameter to initialize_def. 2018-10-15 22:11:20 +09:00
Bill Currie
1746ce3af5 Make int type name reflect its keyword. 
Makes qc error messages make more sense.
 2018-10-15 20:54:05 +09:00
Bill Currie
302934a1e4 Remove some dead code. 2018-10-15 20:52:46 +09:00
Bill Currie
6c53be928b Support returning vector expressions. 
Currently fails due to a scheduling problem when the vector expression
contains functions.
 2018-10-13 23:32:53 +09:00
Bill Currie
aaab18c9a7 Nuke a dead field. 
It looks like ex_temp_t.expr was never really used, and I have no idea
what I had intended (not surprising after ~17 years).
 2018-10-13 12:07:50 +09:00
Bill Currie
2f2edae43b Make error, warning and notice give compiler file/line too. 
But only when verbosity > 1 (-vv).
 2018-10-13 09:31:00 +09:00
Bill Currie
4828934e50 Fix a equality check typo. 
Fixes bad code generation when assigning to vector.x in a function with no
parameters and the vector is the first local var.
 2018-10-12 23:39:05 +09:00
Bill Currie
78e0a8dc52 Support assigning non-constant vector expressions. 2018-10-12 22:05:17 +09:00
Bill Currie
e03dfa29b4 Clean up the module .ctor construction a little. 2018-10-12 21:09:36 +09:00
Bill Currie
f56d25cda6 Don't double print messages. 2018-10-12 20:46:45 +09:00
Bill Currie
668896aa82 More diagnostic improvements. 2018-10-12 16:01:11 +09:00
Bill Currie
71b3d30aa1 Make the ice a little more informative. 2018-10-12 14:51:39 +09:00
Bill Currie
f58c2fef5a Switch QF's quaterions from wxyz to xyzw. 
After messing with SIMD stuff for a little, I think I now understand why
the industry went with xyzw instead of the mathematical wxyz. Anyway, this
will make for less pain in the future (assuming I got everything).
 2018-10-12 14:33:55 +09:00
Bill Currie
b7aa5bb8fe Fix an oops messing up edict size. 2018-10-12 14:33:26 +09:00
Bill Currie
f8606ebab8 Fix a object file segfault when spaces have no data. 
ie, don't attempt to copy memory from a null pointer (just copy the null
pointer).
 2018-10-12 14:00:34 +09:00
Bill Currie
3bd9f96b07 Make internal error messages a little more helpful. 
They now include the file and line of the compiler as well.
 2018-10-12 13:57:59 +09:00
Bill Currie
3656cb966c Fix some bison deprecation warnings. 2018-10-12 09:32:49 +09:00
Bill Currie
3bc664811e Fix lost error count tracking. 2018-10-11 22:03:14 +09:00
Bill Currie
a096babb1f Duplicate memory when creating a qfo from progs. 
Fixes some double-free bugs when linking after compiling.
 2018-10-11 21:37:01 +09:00
Bill Currie
82809eb856 Simplify the call to PR_LoadProgsFile. 
I've decided that setting pr.max_edicts and pr.zone_size as part of the
local progs initialization rather than in PR_LoadProgsFile makes more
sense. For one, it is unlikely for the limits to change every time progs is
reloaded. Also, they seem to be a property of the VM rather than the progs.
However, there is nothing stopping the caller from updating max_edicts and
zone_size every call.
 2018-10-11 10:06:48 +09:00
Bill Currie
673b45be05 Add diagnostic hooks. 2018-10-09 12:46:13 +09:00
Bill Currie
34bcf7faab Do a pure/const/noreturn/format attribute pass. 
I always wanted these, but as gcc now provides warnings for functions that
could do with such attributes, finding all the functions is much easier.
 2018-10-09 12:42:21 +09:00
Bill Currie
71569b45c9 Pre-format diagnostic messages. 
This will make it easier to hook diagnostics enabling unit tests.
 2018-09-09 18:09:32 +09:00
Bill Currie
113e0d82ba Fix a signed comparison error. 
Not sure how this fix got lost.
 2018-09-09 16:48:19 +09:00
Bill Currie
59e85b7d5e Fix a pile of dead assignments. 
Some were actual bugs!
 2018-09-08 22:23:57 +09:00
Bill Currie
59b04dbcca Make many qfo int fields unsigned. 
I don't remember why I thought signed was a good idea, but unsigned does
make more sense for most fields.
 2018-09-08 19:45:19 +09:00
Bill Currie
f75ff2d269 Fix some null argument issues. 2018-09-07 22:30:44 +09:00
Bill Currie
8f028b8a0d Fix some double frees. 2018-09-07 20:03:19 +09:00
Bill Currie
8fd5be0ee0 Fix a pile of sizeof goofs. 
While scan-build wasn't what I was looking for, it has proven useful
anyway: many of the sizeof errors were just noise, but a few were actual
bugs (allocating too much or too little memory).
 2018-09-07 20:00:57 +09:00
Bill Currie
2fcda44ab0 Kill dag leaf nodes on assignment. 
Fixes the failing swap test caused by a's original value being used (via t)
after being written.
 2018-08-23 20:07:22 +09:00
Bill Currie
cb366dd825 Better flow dot dump "scripting". 
Not sure I want to keep the statements in the live dump, but the system
is more flexible now.
 2018-08-23 20:07:11 +09:00
Bill Currie
cdbdf3f0eb Make print_operand global. 2018-08-23 20:05:16 +09:00
Bill Currie
0f279cd3f0 Add a comment about fake statement numbers. 
I had forgotten how they worked (not surprising after 6 years).
 2018-08-21 15:57:51 +09:00
Bill Currie
1b84ea747c Dump statements during flow analysis. 2018-08-21 15:56:39 +09:00
Bill Currie
5ba13d759b Fix a FIXME. 
Set of everything got added shortly after that FIXME was added, but I
forgot to fix it.
 2018-08-21 15:56:03 +09:00
Bill Currie
fbdf560a7a Rename print_extra_live to print_flow_vars. 2018-08-21 15:55:11 +09:00
Bill Currie
5dbb7b6d4d Handle all modelgen commands. 
Just in case someone ever adds models.qc to progs.src.
 2018-08-20 00:11:02 +09:00
Bill Currie
027e76b4c9 Add a doc block to parse_cpp_line. 
It took me too long to figure it out :P
 2018-08-20 00:09:20 +09:00
Bill Currie
b795beb520 Add support for \? to qc strings. 
And fix up the man page a bit.
 2018-08-19 19:31:52 +09:00
Bill Currie
0de0eb2fc7 Fix a bunch of bit-rot. 2018-06-08 13:21:30 +09:00
Bill Currie
2329fb1885 Fix some warnings and bitrot. 2016-10-25 00:10:30 +09:00
Bill Currie
932647bad3 Fix a segfault with switch on an undefined symbol. 
Forgot to check if the test expression was not an error.
 2016-01-10 13:41:49 +09:00
Bill Currie
bf40f0126e Convert vector expressions when passing parameters. 
Calling a function with [vector stuff] caused an ICE.
 2016-01-08 21:16:37 +09:00
Bill Currie
1061256c4f Add a missing expression type to dot_expr. 2016-01-08 21:15:47 +09:00
Bill Currie
431074d58f Update label destination when moving labels. 
This fixes a segfault when optimizing the empty-body test. The label was
getting moved, but the statement block to which it pointed was not updated
and thus it pointed to dead data.
 2016-01-07 21:24:29 +09:00
Bill Currie
d54ee6c8c3 Do not promote debug messages to warnings. 
I think I copied the notice code for debug and forgot to edit the
promotion. Oops.
 2016-01-07 20:08:07 +09:00
Bill Currie
2cd59c962c Rename qfcc's basename to file_basename. 
Avoids naming conflicts with JohnnyonFlame's toolchain.
 2014-01-31 12:22:11 +09:00
Bill Currie
f5501fbf24 Fix a pile of automake deprecation warnings. 
s/INCLUDES/AM_CPPFLAGS/g

I <3 sed :)
 2013-11-24 13:11:50 +09:00
Bill Currie
c88d1987a1 Add warnings for empty blocks in if/else/do. 
Saw a discussion of such in #qc and that gcc implemented it. I realized it
would be pretty easy to detect and very useful (I've made such mistakes at
times).
 2013-09-30 18:09:04 +09:00
Bill Currie
db460155e9 Fix multiple function calls in expressions. 2013-09-27 23:15:57 +09:00
Bill Currie
4bc40b3917 Rewrite binary_expr(). 
It is now in its own file and uses table lookups to check for valid type
and operator combinations, and also the resulting type of the expression.

This probably breaks multiple function calls in the one expression.
 2013-09-27 23:15:57 +09:00
Bill Currie
ec98954dfc Remove the small struct optimization. 
It might cause trouble for the binary_expr() cleanup.
 2013-09-27 23:15:57 +09:00
Bill Currie
3295370328 Expose and use field_expr(). 
This may cause problems later on, but it is needed for the binary_expr()
cleanup.
 2013-09-27 23:15:57 +09:00
Bill Currie
ca9693d9cd Expose convert_from_bool(). 2013-09-27 23:15:57 +09:00
Bill Currie
b66cbeeb57 Run fold_constants on comparison operands. 
This is a bit of a workaround to ensure the operands have their types
setup correctly. Really, binary_expr needs to handle expression types
properly.

This fixes the bogus error for comparing the result of pointer subtraction
with an integer.
 2013-09-27 23:15:57 +09:00
Bill Currie
c13f2c2c23 Fix the support for [s, v] for quaterions. 2013-09-27 23:15:57 +09:00
Bill Currie
7f50333b2c Add support for constant [] vector expressions. 2013-09-27 23:15:57 +09:00
Bill Currie
7a7a685105 Add support for actual vector expressions. 
Currently, they can represent either vectors or quaternions, and the
quaternions can be in either [s, v] form or [w, x, y, z] form.

Many things will not actual work yet as the vector expression needs to be
converted into the appropriate form for assigning the elements to the
components of the "vector" type.
 2013-09-27 23:15:57 +09:00
Bill Currie
2572811bf4 Add support for quaternion.w/x/y/z. 
It's sometimes more useful to have direct access to each individual
component of the imaginary part of the quaternion, and then for
consistency, alias w and s.
 2013-09-27 23:15:57 +09:00
Bill Currie
a6cdc8735a Start implementing vec = [x,y,z]. 
This is a nice feature found in fteqcc (also a bit of a challenge from
Spike). Getting bison to accept the new expression required rewriting the
state expression grammar, so this is mostly for the state expression. A
test to ensure the state expression doesn't break is included.
 2013-09-27 23:15:56 +09:00
Bill Currie
35de42aeac Catch bogus comparison types. 
This fixes an ICE when trying to compare a function with a float.
 2013-09-27 23:15:56 +09:00
Bill Currie
03fb47d7ba Fix some sizeof goofs. 
Yay for continually improving gcc warnings :)
 2013-09-26 17:45:30 +09:00
Bill Currie
cef2136050 Implement "not" logic for while and do-while. 
This goes towards complementing the "if not" logic extension. I need to
check if fteqcc supports "not" with "while" (the version I have access to
at the moment does not), and also whether it would be good  to support
"not" with "for", and if so, what form the syntax should take.
 2013-06-26 23:04:35 +09:00
Bill Currie
6fa63f6c54 Implement the basics of fteqcc's -Fifstring. 
It's -Cifstring in qfcc, but otherwise the intent is the same. More testing
and investigation into what fteqcc does is required.
 2013-06-26 23:02:55 +09:00
Bill Currie
8d34d33055 Implement "if not (foo)" syntax. 
It is syntactic sugar for if (!(foo)), but is useful for avoiding
inconsistencies between such things as if (string) and if (!string), even
though qcc can't parse if not (string). It also makes for easier to read
code when the logic in the condition is complex.
 2013-06-26 23:02:55 +09:00
Bill Currie
77337e2402 Separate "" and nil. 
It turns out this is required for compatibility with qcc (and C, really).
Once string to boolean conversions are sorted out completely (not that
simple as qcc is inconsistent with if (string) vs if (!string)), Qgets can
be implemented :)
 2013-06-26 23:02:55 +09:00
Bill Currie
fd1ea9e00e Add an option to control the enum switch warning. 2013-06-26 09:29:37 +09:00
Bill Currie
29df4ac7ee Fix case label lookup. 
It looks like I had forgotten that the compare function is supposed to
return true/false (unlike memcmp's sorting ability). Also, avoid the
pointers in the value struct as they can change without notice.

Using enums in switches now works nicely, including warnings for unused
enum values.
 2013-06-26 09:29:31 +09:00
Bill Currie
8ac2c3a04d Check for unused enum values in switch statements. 
Unfortunately, it turns out the value lookup is broken (including for
duplicate cases).
 2013-06-26 09:25:45 +09:00
Bill Currie
35bc981402 Allow use of a jump table when switching on an enum. 2013-06-26 09:25:45 +09:00
Bill Currie
64f76bd762 Use the right value when getting a function's defref. 
Either I had gotten confused while writing the code and mixed up line and
offset, or I had changed offset to line at one stage but missed a place.
This fixes the segfault when compiling chewed-alias.r and return-ivar.r
 2013-06-24 09:16:55 +09:00
Bill Currie
ca0b03687f Change the naming of ALLOC's free-list. 
Rather than prefixing free_ to the supplied name, suffix _freelist to the
supplied name. The biggest advantage of this is it allows the free-list to
be a structure member. It also cleans up the name-space a little.
 2013-03-08 22:16:31 +09:00
Bill Currie
9d418379bf Use the correct type when allocating flow node edges. 
sizeof (struct) vs sizeof (struct *). Ouch.
 2013-01-30 18:08:59 +09:00
Bill Currie
6a3c775270 Correct the emission of meta class ivars. 
type_obj_class is no longer a class, so its ivars are not stored in
type_obj_class.t.class->ivars but rather type_obj_class.t.symtab.

This fixes the segfault Spirit and Randy were experiencing.

In passing, correct the unneeded emission of meta class ivars for non-root
classes. This should make for much smaller progs that use classes.
 2013-01-30 18:06:48 +09:00
Bill Currie
e27d7cbd2d Handle alloca "correctly". 
Use AC_FUNC_ALLOCA and the #ifdef mess suggested by the autoconf docs
(hidden in qfalloca.h).
 2013-01-22 21:02:50 +09:00
Bill Currie
f1aefc969d Fix some 64-bit mingw compile issues. 
Just one more issue to fix (alloca), but with a hack, QF compiles (no clue
yet if it works: wine doesn't seem to be an option at this stage)
 2013-01-22 21:02:49 +09:00
Bill Currie
0186ca993d Allow the uninitialized variable warning to be suppressed. 2013-01-18 16:28:08 +09:00
Bill Currie
eacc59c016 Build the field types array for enums, too. 
However, every element is the same: type_default's type_def. This fixes the
segfault building qwaq introduced by the previous enum commit.
 2013-01-17 22:01:31 +09:00
Bill Currie
46d2959908 Delay calling find_type for enums. 
As find_type encodes the type too, calling find_type before the enumerators
have been created causes the type encoding to lose the enumerators.
 2013-01-17 20:55:25 +09:00
Bill Currie
7a504f8983 Use float for enum defs in v6 progs. 
The values are (or should be!) written as floats, so don't give any
debuggers hernias when displaying enums in v6 progs.
 2013-01-17 20:53:22 +09:00
Bill Currie
00192ea1da Skip field immediates when generating progdefs.h 
They break the very fragile algorithm :P.
 2013-01-17 16:10:17 +09:00
Bill Currie
89ae5cbf7c Remove the old hacks for qp-lex, too. 2013-01-10 19:42:34 +09:00
Bill Currie
737347b0f6 Remove the prototypes hack. 
While configure isn't testing yet, we need recent bison and flex, so many
of the old hacks are no longer necessary.
 2013-01-10 19:27:22 +09:00
Bill Currie
76a69d9a53 Implement fteqcc's "nosave" specifier. 
Of course, it's "@nosave" for traditional progs, but that's only a define
away.
 2013-01-07 14:35:34 +09:00
Bill Currie
955e3ee258 Initialize the type to be ev_func. 
This fixes the returning of the wrong function symbol when resolving
overloaded functions and one of the functions takes no parameters.
 2013-01-07 13:52:48 +09:00
Bill Currie
338bb9bba0 Look up the function symbol when resolving overloaded functions. 
This fixes the bogus undefined symbol errors when resolving unambigous
overloaded functions.
 2013-01-07 13:51:01 +09:00
Bill Currie
e0e69ac71a Fix some signed/unsigned comparison warnings. 
It seems mingw's gcc treats pointer subtraction differently to how linux's
gcc does.
 2013-01-05 17:52:48 +09:00
Bill Currie
34c0c82408 Add support for binary constants using the 0b prefix. 
Just because :P (now that gcc support it, it seems worthwhile, I guess)
 2013-01-04 19:32:04 +09:00
Bill Currie
b225879d16 Print all four sets with a legent for live vars. 
Much more informative :)
 2012-12-26 11:54:49 +09:00
Bill Currie
c5179c9e99 Add MOVEP's opc to the use set. 
MOVEP's opc itself is always known and used, whether it's a constant
pointer or variable doesn't matter. This fixes the lost pointer calculation
for va_list.list[j] = object_from_plist (item);
 2012-12-26 11:53:06 +09:00
Bill Currie
412fb4aacd Fix a static out of bounds error. 
I really must compile with optimizations more often :P
 2012-12-26 11:51:40 +09:00
Bill Currie
386a729209 Remove dead nodes from dags. 
Dead nodes are those that generate unused values (unassigned leaf nodes,
expressions or destinationless move(p) nodes). The revoval is done by the
flow analysis code (via the dags code) so that any pre and post removal
flow analysis and manipulation may be done (eg, available expressions).
 2012-12-25 17:07:58 +09:00
Bill Currie
1e3154ecd5 Do not always reset current_storage. 
resetting current_storage in external_def_list's empty rule breaks the
block storage scopes (extern { ... } etc);
 2012-12-25 13:43:52 +09:00
Bill Currie
e414117fe8 Move jump threading into the dead-code removal loop. 
Dead code removal can give more opportunities to the useless branch removal
in the jump threading code.
 2012-12-25 13:33:31 +09:00
Bill Currie
07187cae7c Remove useless conditional branches too. 
"if x" jumping to the next statement is pretty useless.
 2012-12-25 13:23:14 +09:00
Bill Currie
92fffb3c7e Check for a flow var for temp aliases. 2012-12-25 13:22:31 +09:00
Bill Currie
9d27764576 Use new_binary_expr to recreate the assignment. 
assign_expr mangles the destination expression for dereferenced
assignments into something that is invalid as an lvalue, so simply use
new_binary_expr with the same opcode.
 2012-12-24 20:12:56 +09:00
Bill Currie
0fc8aa54e1 Make expr->next edges constrained. 
It turns out expression trees are (mostly?) valid DAGs, so all edges being
constrained works, though the graphs get a little tall (but easier to read).
 2012-12-24 20:06:38 +09:00
Bill Currie
79519bc357 Avoid testing block expressions in truth assignments. 
This fixes the infinite loop in if ((x = self.heat && x))

Really, I think I need to revisit the whole expression tree code. It's
proving to be rather fragile.
 2012-12-24 20:01:16 +09:00
Bill Currie
60af059b6e Allow arbitrary expressions in a bool's block. 
This generates correct code for "if ((x = y))": the assignment still
occurs.
 2012-12-23 19:57:39 +09:00
Bill Currie
f6c4e06183 Reimplement assignment as truth value. 
The source of the assignment is used as the value to test, and the
assignment itself is inserted into the boolean expressions's block. This
fixes the inernal error for "if ((x = 0))".
 2012-12-23 19:53:31 +09:00
Bill Currie
a881fb5f5b Make float values obvious in expression dot dumps. 2012-12-23 19:34:25 +09:00
Bill Currie
f65ce22ddc Fold constants for the return value of test_expr. 
More constantness preservation.
 2012-12-23 19:32:32 +09:00
Bill Currie
22db05dc9c Alias value expressions by aliasing the value. 
This keeps constant expressions constant, even through aliasing.
 2012-12-23 19:31:09 +09:00
Bill Currie
b295524385 Add new_value_expr(). 
This simplifies creating a new expression for an arbitrary value object.
 2012-12-23 19:29:50 +09:00
Bill Currie
42ba0c9d54 Add alias_value() function. 
alias_value returns a new value where only the type is different, the
bit-pattern of the value itself is untouched.
 2012-12-23 19:25:35 +09:00
Bill Currie
82ded2b638 Split the test for assignment and parenthesis. 
This will make it easier to fix the internal error for "if (x = 0)".
 2012-12-23 14:55:16 +09:00
Bill Currie
b9a0e2ce03 Catch the error for undefined++. 2012-12-23 14:47:29 +09:00