Merging r259381:

[oota-llvm.git] / lib / Target / SystemZ / SystemZISelLowering.cpp

diff --git a/lib/Target/SystemZ/SystemZISelLowering.cpp b/lib/Target/SystemZ/SystemZISelLowering.cpp
index 5959e90d2f626b8b797371b3f7a30d0b83ba3fd3..b0a6127646364d219a21c37141f7e752be384163 100644 (file)
--- a/lib/Target/SystemZ/SystemZISelLowering.cpp
+++ b/lib/Target/SystemZ/SystemZISelLowering.cpp
@@ -1603,8 +1603,8 @@ static void adjustSubwordCmp(SelectionDAG &DAG, SDLoc DL, Comparison &C) {
   } else if (Load->getExtensionType() == ISD::ZEXTLOAD) {
     if (Value > Mask)
       return;
-    assert(C.ICmpType == SystemZICMP::Any &&
-           "Signedness shouldn't matter here.");
+    // If the constant is in range, we can use any comparison.
+    C.ICmpType = SystemZICMP::Any;
   } else
     return;
 
@@ -1849,7 +1849,7 @@ static unsigned getTestUnderMaskCond(unsigned BitSize, unsigned CCMask,
     if (CCMask == SystemZ::CCMASK_CMP_NE)
       return SystemZ::CCMASK_TM_SOME_1;
   }
-  if (EffectivelyUnsigned && CmpVal <= Low) {
+  if (EffectivelyUnsigned && CmpVal > 0 && CmpVal <= Low) {
     if (CCMask == SystemZ::CCMASK_CMP_LT)
       return SystemZ::CCMASK_TM_ALL_0;
     if (CCMask == SystemZ::CCMASK_CMP_GE)