llvm-as should catch zero width vector

[nlewycky]

Bugzilla Link	3685
Resolution	FIXED
Resolved on	Feb 28, 2009 12:13
Version	trunk
OS	Linux

Extended Description

This .ll file:

@​a = internal constant void bitcast(<0 x i8> <> to void)

produces an assertion:

llvm-as: Type.cpp:504: llvm::VectorType::VectorType(const llvm::Type*, unsigned int): Assertion `NumEl > 0 && "NumEl of a VectorType must be greater than 0"' failed.
0 llvm-as 0x081a40fd
1 llvm-as 0x081a447b
2 0xffffe400 __kernel_sigreturn + 0
Aborted

Well, yeah. :-) llvm-as should emit a polite error message instead.

[lattner]

Fixed:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20090223/074377.html