[LLVMdev] GCC assembler rejects native code generated by LLVM

[Reid Spencer]

My first patch was a little premature, please use this one.

On Mon, 2005-03-07 at 17:19, Reid Spencer wrote:
> Vyacheslav,
> 
> This is the same problem that I had with Cygwin .. nearly identical.
> The issue was documented in PR492 if you want some background. I'm
> currently trying to dig up what I did to fix this in December for Cygwin
> and see if I can apply the same change for mingw.
> 
> Reid.
> 
> On Mon, 2005-03-07 at 16:39, Vyacheslav Akhmechet wrote:
> > Ok, I got home so I have more details. Here's the sample C program:
> > ----------------- C program ---------------
> >    #include <stdio.h>
> >    int main() {
> >      printf("hello world\n");
> >      return 0;
> >    }
> > ------------- end C program -------------
> > 
> > This is compiled using llvm online demo into the following llvm code
> > (target removed):
> > ----------------- LLVM code --------------
> > deplibs = [ "stdc++", "c", "crtend" ]
> > %.str_1 = internal constant [13 x sbyte] c"hello world\0A\00"; <[13 x
> > sbyte]*> [#uses=1]
> > 
> > implementation   ; Functions:
> > 
> > declare int %printf(sbyte*, ...)
> > 
> > int %main() {
> > entry:
> > call void %__main( )
> > %tmp.0 = call int (sbyte*, ...)* %printf( sbyte* getelementptr ([13 x
> > sbyte]* %.str_1, int 0, int 0) ); <int> [#uses=0]
> > ret int 0
> > }
> > 
> > declare void %__main()
> > ------------- End LLVM code -----------
> > 
> > which in turn produces the following assembly code:
> > 
> > ------------- Assembly code -------------
> > 	.text
> > 	.align	16
> > 	.globl	main
> > 	.type	main, @function
> > main:
> > 	subl $12, %esp
> > 	fnstcw 10(%esp)
> > 	movb $2, 11(%esp)
> > 	fldcw 10(%esp)
> > 	call __main
> > 	movl $l1__2E_str_1, %eax
> > 	movl %eax, (%esp)
> > 	call printf
> > 	movl $0, %eax
> > 	#IMPLICIT_USE
> > 	addl $12, %esp
> > 	ret
> > 
> > 
> > 	.data
> > 	.align	1
> > 	.type l1__2E_str_1, at object
> > 	.size l1__2E_str_1,13
> > l1__2E_str_1:				# [13 x sbyte]* %.str_1 =  c"hello world\0A\00"
> > 	.ascii	"hello world\n\000"
> > ---------- End assembly code ----------
> > 
> > When I try to assemble the above code using
> > gcc hello.c.s -o hello.exe
> > I get the following errors:
> > 
> > hello.c.s: Assembler messages:
> > hello.c.s:6: Warning: .type pseudo-op used outside of .def/.endef ignored.
> > hello.c.s:6: Error: junk at end of line, first unrecognized character is `m'
> > hello.c.s:24: Warning: .type pseudo-op used outside of .def/.endef ignored.
> > hello.c.s:24: Error: junk at end of line, first unrecognized character is `l'
> > hello.c.s:25: Warning: .size pseudo-op used outside of .def/.endef ignored.
> > hello.c.s:25: Error: junk at end of line, first unrecognized character is `l'
> > 
> > Sorry for the long email. I attach all relevant files for clarity.
> > 
> > ______________________________________________________________________
> > _______________________________________________
> > LLVM Developers mailing list
> > LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> > http://mail.cs.uiuc.edu/mailman/listinfo/llvmdev
> 
> ______________________________________________________________________
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://mail.cs.uiuc.edu/mailman/listinfo/llvmdev
-------------- next part --------------
Index: X86AsmPrinter.cpp
===================================================================
RCS file: /var/cvs/llvm/llvm/lib/Target/X86/X86AsmPrinter.cpp,v
retrieving revision 1.132
diff -r1.132 X86AsmPrinter.cpp
87c87,88
<     forCygwin = TT.find("cygwin") != std::string::npos;
---
>     forCygwin = TT.find("cygwin") != std::string::npos || 
>                 TT.find("mingw")  != std::string::npos;
89c90
< #ifdef __CYGWIN__
---
> #if defined(__CYGWIN__) || defined(__MINGW32__)
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20050307/487ee894/attachment.sig>