unhelpful error message on missing terminator instruction

[llvmbot]

Bugzilla Link	3013
Resolution	WONTFIX
Resolved on	Nov 04, 2008 10:35
Version	2.3
OS	Linux
Reporter	LLVM Bugzilla Contributor

Extended Description

If I try to assemble an LLVM IR file with a block missing a terminator instruction, like the following example:

define i32 @​main() {
br i1 true, label %foo, label %bar

foo:
add i32 1, 2
br label %5

bar:
ret i32 0
}

i get an error message like the following:

llvm-as: no-terminator.ll:11,0: Undefined reference to label

This does not in any way point me to the missing terminator instruction for the "foo" block, although this is the actual cause of the error. llvm-as should ideally detect the missing terminator and report that instead, or at least in addition, to the above message.

[lattner]

Yep, unfortunately the current .ll parser has many gross problems. The fix is to rewrite the thing, which will provide many benefits. However, this won't be done until I get time to do so. When that happens, this bug will be fixed, so I'm just going to close this as "WONTFIX" meaning that we aren't going to fix it in the current parser.