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d316836008
At the same time, increase the GCC style warning
---------------------------------------------------------------------------
int main()
{
int a[10] = {[5]=5};
return 0;
}
Disassembly of section .text:
0000000000000000 <main>:
0: 55 push %rbp
1: 48 89 e5 mov %rsp,%rbp
4: 48 81 ec 30 00 00 00 sub $0x30,%rsp
b: b8 05 00 00 00 mov $0x5,%eax
10: 89 45 ec mov %eax,-0x14(%rbp)
13: 48 b8 14 00 00 00 00 movabs $0x14,%rax
1a: 00 00 00
1d: 49 89 c2 mov %rax,%r10
20: b8 00 00 00 00 mov $0x0,%eax
25: 48 89 c6 mov %rax,%rsi
28: 48 8d 45 d8 lea -0x28(%rbp),%rax
2c: 48 89 c7 mov %rax,%rdi
2f: 4c 89 d2 mov %r10,%rdx
32: b8 00 00 00 00 mov $0x0,%eax
37: e8 fc ff ff ff callq 38 <main+0x38>
3c: 48 b8 10 00 00 00 00 movabs $0x10,%rax
43: 00 00 00
46: 49 89 c2 mov %rax,%r10
49: b8 00 00 00 00 mov $0x0,%eax
4e: 48 89 c6 mov %rax,%rsi
51: 48 8d 45 f0 lea -0x10(%rbp),%rax
55: 48 89 c7 mov %rax,%rdi
58: 4c 89 d2 mov %r10,%rdx
5b: b8 00 00 00 00 mov $0x0,%eax
60: e8 fc ff ff ff callq 61 <main+0x61>
65: b8 00 00 00 00 mov $0x0,%eax
6a: e9 00 00 00 00 jmpq 6f <main+0x6f>
6f: c9 leaveq
70: c3 retq
After the patch
0000000000000000 <main>:
0: 55 push %rbp
1: 48 89 e5 mov %rsp,%rbp
4: 48 81 ec 30 00 00 00 sub $0x30,%rsp
b: 48 b8 28 00 00 00 00 movabs $0x28,%rax
12: 00 00 00
15: 49 89 c2 mov %rax,%r10
18: b8 00 00 00 00 mov $0x0,%eax
1d: 48 89 c6 mov %rax,%rsi
20: 48 8d 45 d8 lea -0x28(%rbp),%rax
24: 48 89 c7 mov %rax,%rdi
27: 4c 89 d2 mov %r10,%rdx
2a: b8 00 00 00 00 mov $0x0,%eax
2f: e8 fc ff ff ff callq 30 <main+0x30>
34: b8 05 00 00 00 mov $0x5,%eax
39: 89 45 ec mov %eax,-0x14(%rbp)
3c: b8 00 00 00 00 mov $0x0,%eax
41: e9 00 00 00 00 jmpq 46 <main+0x46>
46: c9 leaveq
47: c3 retq
-----------------------------------------------------------------------------------
"c5.c"
int main()
{
// union st
struct st
{
char c;
short s;
// char cc[];
};
// union st
struct st
ss = { 1, 2, 3};
// int a = ss;
char cb[1] = {1,2,3};
return 0;
}
c5.c:12: warning: excess elements in struct initializer
c5.c:14: warning: excess elements in array initializer
c5.c:14: warning: excess elements in array initializer
|
||
|---|---|---|
| examples | ||
| include | ||
| lib | ||
| tests | ||
| win32 | ||
| .gitignore | ||
| arm-gen.c | ||
| c67-gen.c | ||
| Changelog | ||
| CMakeLists.txt | ||
| coff.h | ||
| config.h.in | ||
| config.texi.in | ||
| configure | ||
| conftest.c | ||
| COPYING | ||
| elf.h | ||
| i386-asm.c | ||
| i386-asm.h | ||
| i386-gen.c | ||
| i386-tok.h | ||
| il-gen.c | ||
| il-opcodes.h | ||
| libtcc.c | ||
| libtcc.h | ||
| Makefile | ||
| README | ||
| RELICENSING | ||
| stab.def | ||
| stab.h | ||
| tcc-doc.texi | ||
| tcc.c | ||
| tcc.h | ||
| tccasm.c | ||
| tcccoff.c | ||
| tccelf.c | ||
| tccgen.c | ||
| tcclib.h | ||
| tccpe.c | ||
| tccpp.c | ||
| tccrun.c | ||
| tcctok.h | ||
| texi2pod.pl | ||
| TODO | ||
| VERSION | ||
| x86_64-asm.h | ||
| x86_64-gen.c | ||
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 torward 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 (for Windows read tcc-win32.txt) Note: For OSX and FreeBSD, gmake should be used instead of make. ./configure make make test make install Alternatively, out-of-tree builds are supported: you may use different directories to hold build objects, kept separate from your source tree: mkdir _build cd _build ../configure make make test make install Texi2html 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.