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Michael Matz c8ca64d28b Adjust return value promotion for some archs
this is a bit complicated: for i386 and x86-64 we really need to
extend return values ourself, as the common code now does.  For arm64
this at least preserves old behaviour.  For riscv64 we don't have to
extend ourself but can expect things to be extended up to int (this
matters for var-args tests, when the sign-extension to int64 needs to
happen explicitely).  As the extensions are useless, don't do them.

And for arm32 we actually can't express GCC behaviour: the callee side
expects the return value to be correctly extended to int32, but
remembers the original type.  In case the ultimate target type for the
call result is only int, no further extension is done.  But in case
the target type is e.g. int64 an extension happens, but not from int32
but from the original type.  We don't know the ultimate target type,
so we have to choose a type to put into vtop:
* original type (plus VT_MUSTCAST) - this looses when the ultimate
  target is int (GCC: no cast, TCC: a cast)
* int (without MUSTCAST) - this looses when the ultimate target is
  int64 (GCC: cast from original type, TCC: cast from int)
This difference can only be seen with undefined sources, like the
testcases, so it doesn't seem worthwhile to try an make it work, just
disable the test on arm and choose the second variant as that generates
less code.
2019-12-17 01:46:06 +01:00
examples makefile: unify cross with native builds 2017-02-25 12:51:04 +01:00
include add C11 stdalign.h header 2019-09-08 15:04:06 +03:00
lib bcheck cleanup 2019-12-14 13:26:18 +01:00
tests Adjust return value promotion for some archs 2019-12-17 01:46:06 +01:00
win32 Add windows constructor/destructor support 2019-11-27 18:29:12 +01:00
.gitignore allow libtcc states to be used concurrently 2019-12-11 02:36:19 +01:00
arm64-gen.c Adjust return value promotion for some archs 2019-12-17 01:46:06 +01:00
arm64-link.c allow libtcc states to be used concurrently 2019-12-11 02:36:19 +01:00
arm-asm.c allow libtcc states to be used concurrently 2019-12-11 02:36:19 +01:00
arm-gen.c remove VT_LVAL_BYTE etc. 2019-12-16 20:59:23 +01:00
arm-link.c allow libtcc states to be used concurrently 2019-12-11 02:36:19 +01:00
c67-gen.c remove VT_LVAL_BYTE etc. 2019-12-16 20:59:23 +01:00
c67-link.c allow libtcc states to be used concurrently 2019-12-11 02:36:19 +01:00
Changelog 'long' review 2017-09-24 18:57:48 +02:00
CodingStyle CodingStyle: Remove reference to misaligned struct CString. 2016-01-06 19:09:28 +00:00
coff.h Spelling fixes in C comments only 2017-05-07 21:38:09 -07:00
configure riscv: More insns, operands and arg slots 2019-09-01 23:13:19 +02:00
conftest.c riscv64: Add skeleton target 2019-08-14 18:18:46 +02:00
COPYING changed license to LGPL 2003-05-24 14:18:56 +00:00
elf.h riscv64: Add skeleton target 2019-08-14 18:18:46 +02:00
i386-asm.c allow libtcc states to be used concurrently 2019-12-11 02:36:19 +01:00
i386-asm.h x86-asm: Fix lar opcode operands 2016-12-15 17:47:08 +01:00
i386-gen.c Adjust return value promotion for some archs 2019-12-17 01:46:06 +01:00
i386-link.c bcheck cleanup 2019-12-14 13:26:18 +01:00
i386-tok.h x86-64-asm: Support high registers %r8 - %r15 2016-12-15 17:47:09 +01:00
il-gen.c Spelling fixes in C comments only 2017-05-07 21:38:09 -07:00
il-opcodes.h Revert all of my changes to directories & codingstyle. 2015-07-29 16:57:12 -04:00
libtcc.c #pragma comment(option, "file.c") 2019-12-16 22:48:31 +01:00
libtcc.h Add error_func and error_opaque getters to libtcc 2019-10-14 09:36:14 +02:00
Makefile bcheck cleanup 2019-12-14 13:26:18 +01:00
README README: Fix typo and remove trailing whitespace 2019-09-14 15:37:20 +02:00
RELICENSING Add note about native Windows bootstrap using Cygwin. 2017-02-23 06:45:26 +01:00
riscv64-gen.c riscv64: adjust for cast changes 2019-12-17 00:48:57 +01:00
riscv64-link.c allow libtcc states to be used concurrently 2019-12-11 02:36:19 +01:00
stab.def Revert all of my changes to directories & codingstyle. 2015-07-29 16:57:12 -04:00
stab.h Revert all of my changes to directories & codingstyle. 2015-07-29 16:57:12 -04:00
tcc-doc.texi Add new bounds checking functions. 2019-12-12 20:49:35 +01:00
tcc.c #pragma comment(option, "file.c") 2019-12-16 22:48:31 +01:00
tcc.h update gen_cast 2019-12-16 21:37:44 +01:00
tccasm.c allow libtcc states to be used concurrently 2019-12-11 02:36:19 +01:00
tcccoff.c allow libtcc states to be used concurrently 2019-12-11 02:36:19 +01:00
tccelf.c -bench fix 2019-12-16 20:17:10 +01:00
tccgen.c Adjust return value promotion for some archs 2019-12-17 01:46:06 +01:00
tcclib.h Revert all of my changes to directories & codingstyle. 2015-07-29 16:57:12 -04:00
tccpe.c -bench fix 2019-12-16 20:17:10 +01:00
tccpp.c -bench fix 2019-12-16 20:17:10 +01:00
tccrun.c -bench fix 2019-12-16 20:17:10 +01:00
tcctok.h bcheck cleanup 2019-12-14 13:26:18 +01:00
tcctools.c allow libtcc states to be used concurrently 2019-12-11 02:36:19 +01:00
texi2pod.pl Revert all of my changes to directories & codingstyle. 2015-07-29 16:57:12 -04:00
TODO Remove a bit-field TODO 2017-04-29 22:09:10 +02:00
VERSION update VERSION to 0.9.27 2017-02-08 19:56:15 +01:00
x86_64-asm.h x86-64-asm: Fix mov im64,rax encoding 2017-02-23 00:16:25 +01:00
x86_64-gen.c Adjust return value promotion for some archs 2019-12-17 01:46:06 +01:00
x86_64-link.c bcheck cleanup 2019-12-14 13:26:18 +01:00

Tiny C Compiler - C Scripting Everywhere - The Smallest ANSI C compiler
-----------------------------------------------------------------------

Features:
--------

- SMALL! You can compile and execute C code everywhere, for example on
  rescue disks.

- FAST! tcc generates optimized x86 code. No byte code
  overhead. Compile, assemble and link about 7 times faster than 'gcc
  -O0'.

- UNLIMITED! Any C dynamic library can be used directly. TCC is
  heading toward full ISOC99 compliance. TCC can of course compile
  itself.

- SAFE! tcc includes an optional memory and bound checker. Bound
  checked code can be mixed freely with standard code.

- Compile and execute C source directly. No linking or assembly
  necessary. Full C preprocessor included.

- C script supported : just add '#!/usr/local/bin/tcc -run' at the first
  line of your C source, and execute it directly from the command
  line.

Documentation:
-------------

1) Installation on a i386/x86_64/arm Linux/OSX/FreeBSD host

   ./configure
   make
   make test
   make install

   Notes: For OSX and FreeBSD, gmake should be used instead of make.
   For Windows read tcc-win32.txt.

makeinfo must be installed to compile the doc.  By default, tcc is
installed in /usr/local/bin.  ./configure --help  shows configuration
options.


2) Introduction

We assume here that you know ANSI C. Look at the example ex1.c to know
what the programs look like.

The include file <tcclib.h> can be used if you want a small basic libc
include support (especially useful for floppy disks). Of course, you
can also use standard headers, although they are slower to compile.

You can begin your C script with '#!/usr/local/bin/tcc -run' on the first
line and set its execute bits (chmod a+x your_script). Then, you can
launch the C code as a shell or perl script :-) The command line
arguments are put in 'argc' and 'argv' of the main functions, as in
ANSI C.

3) Examples

ex1.c: simplest example (hello world). Can also be launched directly
as a script: './ex1.c'.

ex2.c: more complicated example: find a number with the four
operations given a list of numbers (benchmark).

ex3.c: compute fibonacci numbers (benchmark).

ex4.c: more complicated: X11 program. Very complicated test in fact
because standard headers are being used ! As for ex1.c, can also be launched
directly as a script: './ex4.c'.

ex5.c: 'hello world' with standard glibc headers.

tcc.c: TCC can of course compile itself. Used to check the code
generator.

tcctest.c: auto test for TCC which tests many subtle possible bugs. Used
when doing 'make test'.

4) Full Documentation

Please read tcc-doc.html to have all the features of TCC.

Additional information is available for the Windows port in tcc-win32.txt.

License:
-------

TCC is distributed under the GNU Lesser General Public License (see
COPYING file).

Fabrice Bellard.