llvm-1.2 doesn't compile with bison 1.875

[llvmbot]

Bugzilla Link	302
Resolution	WONTFIX
Resolved on	Feb 22, 2010 12:55
Version	1.2
OS	All
Reporter	LLVM Bugzilla Contributor

Extended Description

If I used bison 1.875 to try and compile llvm-1.2, it bails:

Compiling llvmAsmParser.cpp
llvmAsmParser.tab.c: In function int llvmAsmparse()': llvmAsmParser.tab.c:4073: error: parse error before goto'
make[2]: ***
[/usr/home/jack/proj/llvm/base/llvm/lib/AsmParser/Debug/llvmAsmParser.lo] Error 1
make[2]: Leaving directory /usr/home/jack/proj/llvm/base/llvm/lib/AsmParser' make[1]: *** [AsmParser/.makeall] Error 2 make[1]: Leaving directory /usr/home/jack/proj/llvm/base/llvm/lib'
make: *** [all] Error 1

Changing to bison 1.25 works fine.

--Jack

[llvmbot]

assigned to @lattner

[lattner]

I don't have 1.875 here, so I can't reproduce this. Can you please post ~10
lines around line 4073 of the llvmAsmParser.tab.c file?

Thanks!

-Chris

[llvmbot]

[jack@ice:AsmParser]$ cat -n llvmAsmParser.cpp | tail +4058 | head -30
4058 token. /
4059 goto yyerrlab2;
4060
4061
4062 /----------------------------------------------------.
4063 | yyerrlab1 -- error raised explicitly by an action. |
4064 ----------------------------------------------------*/ 4065 yyerrlab1: 4066 4067 /* Suppress GCC warning that yyerrlab1 is unused when no action 4068 invokes YYERROR. */ 4069 #if defined (__GNUC_MINOR__) && 2093 <= (__GNUC__ * 1000 + __GNUC_MINOR__) 4070 __attribute__ ((__unused__)) 4071 #endif 4072 4073 4074 goto yyerrlab2; 4075 4076 4077 /*---------------------------------------------------------------. 4078 | yyerrlab2 -- pop states until the error token can be shifted. | 4079 ---------------------------------------------------------------/
4080 yyerrlab2:
4081 yyerrstatus = 3; / Each real token shifted decrements this. */
4082
4083 for (;;)
4084 {
4085 yyn = yypact[yystate];
4086 if (yyn != YYPACT_NINF)
4087 {

Do you want the relevenet preprocessed code, too?

--Jack

[llvmbot]

( here is what the macros expand to )

---

yyerrlab1:

attribute ((unused))

goto yyerrlab2;

---

[lattner]

Hrm, I don't think this is an LLVM specific problem here. It looks like that
version of bison is not compatible with the version of GCC you're using.
Basically it appears to me that bison is giving the C compiler this:

yyerrlab1:
attribute ((unused))
goto yyerrlab2;

Which is not valid for your version of GCC. Could you try compiling some simple
test grammar, such as one out of the bison manual, to see if this is the case?

-Chris

[llvmbot]

Good call. It's actually a bison bug:

http://mail.gnu.org/archive/html/bug-bison/2004-01/msg00011.html

Cheers,

--Jack