Add support for the 'P' constraint.

Patch by Jack Carter.

llvm-svn: 156292

1 files changed, 11 insertions, 0 deletions

diff --git a/llvm/lib/Target/Mips/MipsISelLowering.cpp b/llvm/lib/Target/Mips/MipsISelLowering.cpp
index 97a0ef67367..910416fe5c5 100644
--- a/llvm/lib/Target/Mips/MipsISelLowering.cpp
+++ b/llvm/lib/Target/Mips/MipsISelLowering.cpp
@@ -3045,6 +3045,7 @@ MipsTargetLowering::getSingleConstraintMatchWeight(
   case 'L': // signed 32 bit immediate where lower 16 bits are 0
   case 'N': // immediate in the range of -65535 to -1 (inclusive)
   case 'O': // signed 15 bit immediate (+- 16383)
+  case 'P': // immediate in the range of 65535 to 1 (inclusive)
     if (isa<ConstantInt>(CallOperandVal))
       weight = CW_Constant;
     break;
@@ -3157,6 +3158,16 @@ void MipsTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
       }
     }
     return;
+  case 'P': // immediate in the range of 1 to 65535 (inclusive)
+    if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
+      EVT Type = Op.getValueType();
+      int64_t Val = C->getSExtValue();
+      if ((Val <= 65535) && (Val >= 1)) {
+        Result = DAG.getTargetConstant(Val, Type);
+        break;
+      }
+    }
+    return;
   }
 
   if (Result.getNode()) {