2012-12-30 03:33:22 +01:00
|
|
|
; RUN: opt -jump-threading -disable-output < %s
|
2011-02-11 00:54:10 +01:00
|
|
|
; PR9112
|
|
|
|
|
|
|
|
|
|
; This is actually a test for value tracking. Jump threading produces
|
|
|
|
|
; "%phi = phi i16" when it removes all edges leading to %unreachable.
|
|
|
|
|
; The .ll parser won't let us write that directly since it's invalid code.
|
|
|
|
|
|
|
|
|
|
define void @func() nounwind {
|
|
|
|
|
entry:
|
|
|
|
|
br label %bb
|
|
|
|
|
|
|
|
|
|
bb:
|
|
|
|
|
br label %bb
|
|
|
|
|
|
|
|
|
|
unreachable:
|
|
|
|
|
%phi = phi i16 [ %add, %unreachable ], [ 0, %next ]
|
|
|
|
|
%add = add i16 0, %phi
|
|
|
|
|
%cmp = icmp slt i16 %phi, 0
|
|
|
|
|
br i1 %cmp, label %unreachable, label %next
|
|
|
|
|
|
|
|
|
|
next:
|
|
|
|
|
br label %unreachable
|
|
|
|
|
}
|
|
|
|
|
|
