better constant handling, should fix many remaining cases

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19984 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/Alpha/AlphaISelPattern.cpp b/lib/Target/Alpha/AlphaISelPattern.cpp
index dcd2407..e8de3c8 100644 (file)
--- a/lib/Target/Alpha/AlphaISelPattern.cpp
+++ b/lib/Target/Alpha/AlphaISelPattern.cpp
@@ -1021,8 +1021,17 @@ unsigned ISel::SelectExpr(SDOperand N) {
 
   case ISD::Constant:
     {
-      long val = cast<ConstantSDNode>(N)->getValue();
-      BuildMI(BB, Alpha::LOAD_IMM, 1, Result).addImm(val);
+      unsigned long val = cast<ConstantSDNode>(N)->getValue();
+      if (val < 32000 && (long)val > -32000)
+       BuildMI(BB, Alpha::LOAD_IMM, 1, Result).addImm(val);
+      else
+       {
+         MachineConstantPool *CP = BB->getParent()->getConstantPool();
+         ConstantUInt *C = ConstantUInt::get(Type::getPrimitiveType(Type::ULongTyID) , val);
+         unsigned CPI = CP->getConstantPoolIndex(C);
+         AlphaLowering.restoreGP(BB);
+         BuildMI(BB, Alpha::LOAD, 1, Result).addConstantPoolIndex(CPI);
+       }
       return Result;
     }