Compile:
%tmp152 = setgt uint %tmp144, %tmp149 ; <bool> [#uses=1]
%tmp159 = setlt uint %tmp144, %tmp149 ; <bool> [#uses=1]
%bothcond2 = or bool %tmp152, %tmp159 ; <bool> [#uses=1]
To setne, not setune, which causes an assertion fault.
llvm-svn: 28244
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index ca123f4..712a030 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -217,7 +217,12 @@
// If the N and U bits get set then the resultant comparison DOES suddenly
// care about orderedness, and is true when ordered.
if (Op > ISD::SETTRUE2)
- Op &= ~16; // Clear the N bit.
+ Op &= ~16; // Clear the U bit if the N bit is set.
+
+ // Canonicalize illegal integer setcc's.
+ if (isInteger && Op == ISD::SETUNE) // e.g. SETUGT | SETULT
+ Op = ISD::SETNE;
+
return ISD::CondCode(Op);
}