[x86] inline asm failure

[asl]

Bugzilla Link	782
Resolution	FIXED
Resolved on	Mar 06, 2010 13:59
Version	1.7
OS	All
Blocks	llvm/llvm-bugzilla-archive#862
Attachments	Source C file, Generated LLVM code

Extended Description

During build of llvm-gcc4 on mingw32 platform I've faced with the "Could not
match memory address. Inline asm failure!" error message.

C code and generated LLVM IR is attached.

[asl]

assigned to @lattner

[lattner]

Progress:
X86 backend now supports "m" constraint:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20060605/035468.html

Codegen now supports references to regs that are oversized (using AX as an int in this case):
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20060605/035471.html
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20060605/035473.html

Next issue is that we don't support memory outputs. Reduced testcase is:

void %foo(int* %dest) {
call void asm "ZAPPA $0", "=m"( int* %dest)
ret void
}

I will try to get this fixed soon, but have other things to switch off to first.

-Chris

[lattner]

Fixed.

[asl]

mentioned in issue llvm/llvm-bugzilla-archive#862