[LLVMdev] GCC assembler rejects native code generated by LLVM

[Reid Spencer]

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.
> 
> ______________________________________________________________________
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