unwind crashes lli

[llvmbot]

Bugzilla Link	2429
Resolution	DUPLICATE
Resolved on	Jun 12, 2008 01:45
Version	unspecified
OS	MacOS X
Attachments	A minimal example of using 'unwind'
Reporter	LLVM Bugzilla Contributor

Extended Description

The attached .bc file crashes lli unless -force-interpreter is used. It also crashes when compiled to native code. (this is with the current svn head.)

Here's the IR:

; ModuleID = 'unwind'

define i32 @"tart.main()->i32"() {
entry:
invoke void @"tart.foo()"( )
to label %nounwind unwind label %catch

catch:
ret i32 0

nounwind:
ret i32 1
}

define void @"tart.foo()"() {
entry:
unwind
}

define i32 @​main(i32, i8**) {
entry:
invoke i32 @"tart.main()->i32"()
to label %success unwind label %failure ; :2 [#uses=1]

success: ; preds = %entry
ret i32 %2

failure: ; preds = %entry
ret i32 -1
}

[llvmbot]

Codegen does not support unwind unfortunately.
For the moment you have to run the LowerInvoke
pass with -enable-correct-eh-support. I know
this sucks, but doing this right is a hard problem,
though it may not appear that way!

*** This bug has been marked as a duplicate of bug #1950 ***

[llvmbot]

This same example crashes when using llc / gcc:

llc -enable-eh -f unwind.bc
gcc unwind.s
./a.out

The above sequence produces a segfault.