introducing since release of software to be recognised. This should hopefully
allow the builds to progress a littles further on systems such as the POWER8
which features a little endian 64-bit PowerPC CPU identified as ppc64le.
list of changes, they can be found at
http://pcc.ludd.ltu.se/fisheye/changelog/pcc
Along with numerous bug fixes, the highlights might be a rewrite
of the CPP parser, updated backends for arm, pdp11, m68k, vax and
mips along with new backend for 8086. PCC now builds itself as a
2-pass compiler. There have been fixes for use with musl, C11
support added and use of UTF8 internally. PE/COFF target was fixed,
and Minix target added.
the last import, and some build framework has been changed so this
makes it easier for people to work with later versions.
The full list of changes in the meantime are available at the PCC
CVS server, and the bugs fixed are detailed at the PCC bug tracker,
but in summary, new features added are a C++ front end, m68k support
and unicode support.
and bugs fixed in the areas of the register allocator, floating point,
attributes, long long arithmetic, PIC support and code sections (for
shared libraries) among others.
This version compiles the vast majority of the NetBSD sources on i386,
and bug reports are welcome at the PCC JIRA server.
the last import, and some build framework has been changed so this
makes it easier for people to work with later versions.
The full list of changes in the meantime are available at the PCC
CVS server, and the bugs fixed are detailed at the PCC bug tracker,
but in summary, new features added are a C++ front end, m68k support
and unicode support.
and bugs fixed in the areas of the register allocator, floating point,
attributes, long long arithmetic, PIC support and code sections (for
shared libraries) among others.
This version compiles the vast majority of the NetBSD sources on i386,
and bug reports are welcome at the PCC JIRA server.
The full changelog is at
http://pcc.ludd.ltu.se/fisheye/changelog/~date=2012-03-25T06%3A00%3A00/pcc
and includes some bug and documentation fixes.
The siginifcant improvements were that the __returns_twice__ attribute is
now accepted, and a problem parsing attributes on parameters of function
prototypes was fixed.
(both of these issues caused problems compiling with the NetBSD headers)
The full changelog is at
http://pcc.ludd.ltu.se/fisheye/changelog/~date=2012-01-05T06%3A00%3A00/pcc
notable improvements since 2011-09-01
- the previous version failed to compile an i386 kernel, this works
(and the kernel boots though I would consider it experimental)
- MacOS X fixes
- misc documentation improvements
- improved regression tests
- some work has been done towards supporting C++
Continual development has happened since the previous 0.9.9
snapshot of 20100603 and the full commit log is too long to
include here, but can be seen at
http://pcc.ludd.ltu.se/fisheye/changelog/~date=2011-09-01T06%3A00%3A00/pcc
Many bugs were reported and fixed, along with reworks of the compiler
internals in several areas, notable milestones were
* more builtins, libpcc is no longer required on NetBSD
* improved gcc compatibility (eg gnu-inline semantics)
* NetBSD/VAX kernel compiles and boots
* using cpp as backend for lint now fully working
* PIC support seems complete
* NetBSD/i386 kernel can be compiled and booted
* better float/double/complex support
* amd64 support on OSX
* reworked Makefiles
* pcc 1.0.0 was release on April 1 2011
* several xasm improvements
* FreeBSD/amd64 system can be compiled with very few changes
* DragonFly fixes from downstream
* rewritten #pragma support
* TLS support added
* many regression tests
* rewrite of internal attribute handling
so provide the TARGMACH definition to the compiler here.
(makes no difference to the currently imported sources, but
will be easier for people wanting to try newer sources)
bugfixes and feature additions, full changelog is below. The major
feature I think was the GCC compatibility which is now enabled by
default, with many of the commonly used GCC attributes and builtin
functions now supported, and pcc defines __GNUC__ as version 4.3
This version can build all of bin/, sbin/ and games/ except for dab(5),
with only a few outstanding issues in usr.bin/ and usr.sbin/. There are
still issues with PIC code generation (affects building libraries, on
i386 at least) and I have not tried applying pcc to kernel builds.
ChangeLog, in most-recent first order, screen-scraped from
http://pcc.ludd.ltu.se/fisheye/changelog/pcc
Each paragraph is a separate commit, the [xxx] refers to the module
that the following commits were in:
[ccom]
Fix designated initializer bug as reported by Iain Hibbert on pcc-list.
Put in prototype for dainit() to avoid warnings when using yacc.
Discard parameter attributes, they ended up to be handled as arguments
otherwise. Suppose to fix Jira#PCC-132 by Iain Hibbert.
Rewrite __builtin_offsetof() to handle non-constant array offset values.
This actually made the offsetof code much simpler.
Requested by Iain Hibbert on pcc-list.
Op DOT will be BINODE.
Support gcc ugly construction a?:b, as discussed on pcc-list.
Add gcc compat range initializers, reported by Iain Hibbert.
[amd64]
Do not put eax as hidden argument if not needed.
Better support for the Intel addressing modes. Now ByteBench only takes
77% of the earlier time to complete.
[mip]
Do not base hash functions on memory addresses. These addresses may
change between different compilations and we want predictability.
Also check if an address of a node is lower than expected to avoid
short-range temporaries in the Freeze() code.
[i386]
Clear flags field on TEMP nodes so that function pointers will get their
stack adjusted afterwards, otherwise there might be junk left.
[ccom]
Aet alignment to at least ALCHAR for structs when passing them over to
pass2. Failure to do so caused bug spotted by Iain Hibbert.
[sparc64]
Fix string init bug, from Lars Zetterlund.
[mip]
Declare printip2() as static function for whole file, as pointed out by
Iain Hibbert.
[ccom]
Make the canary value on stack volatile, so that the compiler won't
try to put it into a register. Solves stack overwrite error reported
by Iain Hibbert on pcc-list.
[i386]
Fix uninitialized member bug in picsymtab breaking -k -g. Suppose to fix
Jira#PCC-138 by Nicolas Joly, patch provided by Iain Hibbert.
[ccom]
Tell scan to ignore typedefs of the same names goto labels. Fixes
Jira#PCC-141 by Andreas Kaiser with recommended fix from him.
[mip]
Run deljumps again after the ssa pass to cleanup the code before doing
register allocation.
[mip]
Do liveness analysis before turning a function into SSA code, and later
use that to to find out whether we need to insert a phi function or not.
This is usually called "Pruned SSA".
Now the SSA code tend to be significantly better quality.
Fix deljumps label updating bug.
Remove statements that are moves to itself in deljumps.
[libpcc]
Define _VA_LIST_DEFINED for compatibility eglibc headers.
From tg@mirbsd.de.
[ccom]
Ensure CM towers are built to the left, fixes parsing bug pointed put
by Jonathan Gray. Also add "used" attribute.
[mip]
Teach dce() to remove ip structs without destroying the basic block
structure.
[ccom]
Check if type is an array before checking its dimension. Fixes bug
reported by Iain Hibbert on pcc-list.
[i386]
Tell table to prefer 2-op insns before 3-op.
Do not try to match args on builtins.
[mip]
Do not favorize 3-op instruction in the ssa case, simple statements
like i++ have been rewritten to t1 = t2 + 1 and we want the register
allocator to try to put t1 and t2 in the same register if there are
2-op insns.
Help coloring algorithm by at the time of assigning registers see if
there are any frozen moves to nodes that have already got their color
and we can give this node the same register.
This will avoid unneccessary moves.
Move list init into the function that initializes it.
Put two more variables into p2env, to have a cleaner way of passing
information in the optimizer phase.
Fix broken indentation.
Do not put a move on the move list more than once.
Count precolored nodes as infinite K, not 0, otherwise it may make
colorable graphs uncolorable when there are many moves.
[ccom]
Fix reporting on bogus error of struct parameters, as reported by Iain
Hibbert on pcc-list.
[amd64]
Remove cast of pointer converted ints, not needed on amd64. Fixes
Jira#PCC-136 by Nicholas Joly.
[ccom]
Add and handle gcc attribute __warn_unused_result__. Requested by Iain
Hibbert but with a different implementation.
Do not allow initialization of multi-dimension incomplete arrays, fixes
bug reported by Jesus Sanchez on pcc-list.
Also fix another bug spotted, which had as a result that dynamic-sized
arrays initialized by strings did not become null-terminated.
[amd64]
amd64 cannot handle imemdiate constants for 64-bit simple ops.
Fixes Jira#PCC-134 by Nicolas Joly.
[ccom]
Allow any expression inside typeof. Supposes to fix Jira#PCC-135
by Iain Hibbert.
[mip]
Replace deljumps() with the stuff used in the 2BSD c2.
Still some parts to implement though.
[i386]
Yech, yesterdays worst thinko about where to put the return check for
floats. Now awk works again.
Use SSTDCALL, not FSTDCALL for symtab entries. Spotted by Iain Hibbert.
Reorganize late mangle code a little. Now stdcall should work.
[mip]
Remove some #if 0'ed code that is phased out.
[i386]
The n_flags fields should use NLOCALx defines, not hardcoded numbers.
Found by Iain Hibbert.
[ccom]
Check for NaN string is only valid for ICON nodes. Bug found by
Iain Hibbert.
[i386]
Detect the situation where a function returns a float number but the
return value is ignored; the float stack must be popped anyway.
FIxes a bug in awk where the float stack overflows.
[ccom]
Clear out symtab pointers for NAME and ICON nodes in functions to
be inlined, since accessing them will result in crashes. Fixes
stdcall/ccall bugs reported by Iain Hibbert.
[ccom, i386]
Add support for stdcall and cdecl attributes. Patch from iain Hibbert.
[ccom]
Remove redundant GETSUE() define, from Iain Hibbert.
Fix yet another situation where attributes causes warnings.
Reported and slightly modified patch from Iain Hibbert.
Handling of argument to scalinit() was incorrect causing wrong type to
be returned. Fixes Jira#PCC-131 by Iain Hibbert.
Fix problem with offsetof of zero-length arrays and a debug segfault.
Fixes Jira#PCC-129 by Iain Hibbert.
Fix checking of struct sizes. Solves Jira#PCC-128 by Iain Hibbert.
Remove redundant check that caused function names beginning with L to
be treated as wide strings in __func__. Patch from Iain Hibbert.
[amd64]
Add last memcpy for function returning structs. Should be complete now.
[configure]
Set default wchar type to int instead of unsigned.
[cc]
Fix wchar defines as requested by Iain Hibbert.
[cpp]
One more comment-handling bug found by Iain Hibbert.
Forgot to null-terminate yytext. Bug pointed out by Iain Hibbert.
[ccom]
No reason not to allow pointers larger than LONG, as pointed out by
Peter Kuschnerus.
Cast 0x80 to char to avoid a warning. Fixes compiler warning as
reported by Peter Kuschnerus.
[amd64]
Add arg count index to builtin switch table.
[ccom]
Fix segfault bug, found and patch provided by Iain Hibbert.
While here, make the switch table const.
Do not segfault if the string given to __builtin_nan is a NULL pointer.
Bug reported by Iain Hibbert.
[ccom]
Discard comments in yylex() so that -C works even with comments in
#if directives. Supposes to fix Jira#PCC-126 by Iain Hibbert.
Add huge/inf/nan builtins as requested by Iain Hibbert.
Also add a generic builtin function, based on a slightly modified
version of a patch by Iain Hibbert.
Add another cast routine which will cast without adding a "cast" and
therefore it will complain if it's a bad cast (like int to pointer).
[amd64]
Fix bugs where int should be long. Fixes Jira#PCC-125 by Nicholas Joly.
[ccom]
Break out buintins to their own file. Common argument count check
for builtins. Should have argument cast checks here also.
[i386]
Add support for attribute "visibility".
[amd64]
Do not emit visibility type "default" since it's ``default''.
Print out visibility directives for as.
[ccom]
Add attribute support for visibility per patch from Iain Hibbert.
[i386]
Add support for constructor/destructor attribute.
XXX defloc() should be possible elf-common code.
[amd64]
Add con/destructor support. XXX pragma init/fini should be MI.
[ccom]
Add con/destructor as attributes per patch from Iain Hibbert.
Different target implementations though.
[amd64]
Fix struct argument/return bugs. Add PIC support.
[ccom]
Change some forgotten code to find the bottom type size; since type
sizes are not directly inherited anymore. Fixes coredump bug by
Iain Hibbert.
[cc, cpp, ccom]
Fix arrows from joerg@netbsd via plunky on pcc-list.
Escape some dashes and use an em-dash (noted by Thorsten).
Fix broken markup in manpages (from plunky on pcc-list).
[ccom]
Add __builtin_memset, per patch from Iain Hibbert.
[i386]
Remove unused variable, as Iain Hibbert kindly informed.
Remove unused (and irrelevant) statement.
[ccom]
Add cast() function that is an easier-to-use wrapper around buildtree().
[ccom, mip]
kill some commons; ragge@ ok
[cpp]
Allow # alone on lines, as requested by Mickey.
[ccom]
Accept gcc attributes after a gcc asm() rename directive. Bugfix
provided by Iain Hibbert. Supposed to fix Jira#PCC-104.
Implement __builtin_memcpy(). Now pcc can compile itself again on OS X.
Add support for variable renaming when assingning; i.e.
int foo asm("bar") = 2;
and not only
int foo asm("bar");
Should fix Jira#PCC-116 by Altamiranus.
Add support for attribute modes SF, DF, byte, word, pointer.
Should fix Jira#PCC-114 by Altamiranus.
Understand QI mode attribute as CHAR. Fixes Jira#PCC-113 by Altamiranus.
Understand function attributes pure and const. Fixes Jira#PCC-110 and
Jira#PCC-111 by Altamiranus.
[cpp]
Fix const usage. From Iain Hibbert.
[mip]
License (and small code) change in the code repository where the
function basename() came from. From Iain Hibbert.
[sparc64]
Correct format strings and STASG return register.
Addresses PCC-107 and PCC-108 from Dmitry Alenichev.
[i386]
Remove unused locals on non-openbsd builds.
[cc]
Don't define __GNUC__ on win32 until problems with header files are
resolved.
[ccom]
Add my local changes for building with the Microsoft compiler.
Add support for attribute mode and some mode types. Should solve
Jira#PCC-101 by Detlef Riekenberg.
[cpp]
Print out an extra \n before emitting a new line-file directive.
Solves Jira#PCC-97 by Gregory McGarry.
[ccom]
Add gcc attribute nothrow as patch in Jira#PCC-102 by Detlef Riekenberg.
[cpp]
Understand gcc directive #include_next. Solves Jira#PCC-106 by Altamiranus.
[ccom]
Handle more cases of attribute. Adds another shift/reduce conflict.
Understand malloc attribute and ignore it, we do not do aliasing yet.
Handle sizes of pointers to forward declarated strust/unions better.
[i386]
Print out constants in the same radix as gcc, to simplify debugging.
Correct return values of STASG.
[mip]
STASG must be treaded as ASSIGN in sanity checks.
[i386, amd64]
generate symbol types and section attributes for elf; ragge@ ok
[ccom]
Ueck, forgot some debug printouts :-(
Handling of attribute strings was broken; they were treated as names.
Reported by Michael Shalayeff who provided a diff, but fixed in a more
common way.
[i386]
Fix bug causing comparision of two long-long values to sometimes fail
(low-order values must be compared unsigned). Reported by Jonathan Gray.
Also fix a bug in struct assignment causing broken code to be generated.
[cc]
Get GCC_COMPAT from configure.
At last - defined __GNUC__ etc. and also __GNUC_STDC_INLINE__.
[mip]
Only try to shortcut the conditional code generation if the operands are
of types +-*/%&|^>><<, otherwise side effects may be lost. Bug found
by Jonathan Gray.
[ccom]
Add the g77 types, for compatibility.
[amd64]
Give 32-bit register to movl instruction. Fixes Jira#PCC-100 by
Dara Hazeghi.
Allow moving of TEMPs to regs. Fixes Jira#PCC-99 by Dara Hazeghi.
[sparc64]
Sparc64 patches from Lars Zetterlund. Are supposed to fix Jira#PCC-20.
[ccom]
Add __builtin_offset(), which is becoming more and more common.
Suggedted by Jonathan Gray.
[csu]
Use 'test -f' rather than 'test -e' for improved portability.
From Adam Hoka.
[powerpc]
Improve alignment.
[linux]
Improve building of shared libraries on linux. Tested on Ubuntu 8.04.
[libpcc]
Remove definition of off_t, since it is frequently wrong. Confirmed OK on
Ubuntu 8.04, OSX and Win32.
[i386]
Fix alignments on OSX.
[tests]
Get test to work on win32.
Don't use __attribute__ in this test, since most systems will define it
away if not gcc.
[mip]
Change static array to allocated linked list for temporaries not allowed
to be spilled. libssl seems to make a heavy use of extended assembler.
Bug reported by Jonathan Gray.
[i386]
dd support for gcc xasm arg types I, J, K, L, M, N. Fixes Jira#PCC-96
by Jonathan Gray.
[ccom]
kill unused variables; ragge@ ok
[hppa]
fix merge error
[ccom]
Put back nocon_e, creates better yacc code.
[hppa]
fixx fallout form walkf() change and other gcc bitchings
add pragma support (from amd64 ;)
[powerpc, i386, arm, amd64, mips]
Return to the text segment after putting reference in constructor table.
Should fix PCC-65.
[ccom]
Rearrange yacc code slightly to avoid a shift/reduce conflict, that
could cause unwanted syntax errors.
Giving multiple declarations of the same prototype failed if there
were dynamic arrays as arguments.
Fix bug in debug printout of prototype parameters.
Accept [*] as [] in prototypes. Fixes Jira#PCC-94 by Jonathan Gray.
[mip]
Must add moves before and after a +r xasm directive even if the node
is in a temporary; the temporary may need to be spilled.
sevan