Handle some more combinations of extend and icmp. Fixes PR1940.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46431 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 13 insertions, 0 deletions

diff --git a/lib/VMCore/Instructions.cpp b/lib/VMCore/Instructions.cpp
index 156eff1..b945a5a 100644
--- a/lib/VMCore/Instructions.cpp
+++ b/lib/VMCore/Instructions.cpp
@@ -2429,6 +2429,19 @@ ICmpInst::Predicate ICmpInst::getSignedPredicate(Predicate pred) {
   }
 }
 
+ICmpInst::Predicate ICmpInst::getUnsignedPredicate(Predicate pred) {
+  switch (pred) {
+    default: assert(! "Unknown icmp predicate!");
+    case ICMP_EQ: case ICMP_NE: 
+    case ICMP_UGT: case ICMP_ULT: case ICMP_UGE: case ICMP_ULE: 
+       return pred;
+    case ICMP_SGT: return ICMP_UGT;
+    case ICMP_SLT: return ICMP_ULT;
+    case ICMP_SGE: return ICMP_UGE;
+    case ICMP_SLE: return ICMP_ULE;
+  }
+}
+
 bool ICmpInst::isSignedPredicate(Predicate pred) {
   switch (pred) {
     default: assert(! "Unknown icmp predicate!");