[llvm-commits] [llvm] r75629 - in /llvm/trunk/lib/Target/MSIL: MSILWriter.cpp MSILWriter.h

[Anton Korobeynikov]

Author: asl
Date: Tue Jul 14 04:53:14 2009
New Revision: 75629

URL: http://llvm.org/viewvc/llvm-project?rev=75629&view=rev
Log:
Add extra sign extension to the same bit width before int sign
extension to another bit width. This is needed to get correct singed value.
Patch by Artur Pietrek!

Modified:
    llvm/trunk/lib/Target/MSIL/MSILWriter.cpp
    llvm/trunk/lib/Target/MSIL/MSILWriter.h

Modified: llvm/trunk/lib/Target/MSIL/MSILWriter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/MSIL/MSILWriter.cpp?rev=75629&r1=75628&r2=75629&view=diff

==============================================================================
--- llvm/trunk/lib/Target/MSIL/MSILWriter.cpp (original)
+++ llvm/trunk/lib/Target/MSIL/MSILWriter.cpp Tue Jul 14 04:53:14 2009
@@ -670,12 +670,18 @@
 
 
 void MSILWriter::printCastInstruction(unsigned int Op, const Value* V,
-                                      const Type* Ty) {
+                                      const Type* Ty, const Type* SrcTy) {
   std::string Tmp("");
   printValueLoad(V);
   switch (Op) {
   // Signed
   case Instruction::SExt:
+    // If sign extending int, convert first from unsigned to signed
+    // with the same bit size - because otherwise we will loose the sign.
+    if (SrcTy) {
+      Tmp = "conv."+getTypePostfix(SrcTy,false,true);
+      printSimpleInstruction(Tmp.c_str());
+    }
   case Instruction::SIToFP:
   case Instruction::FPToSI:
     Tmp = "conv."+getTypePostfix(Ty,false,true);
@@ -1152,9 +1158,13 @@
   case Instruction::Store:
     printIndirectSave(Inst->getOperand(1), Inst->getOperand(0));
     break;
+  case Instruction::SExt:
+    printCastInstruction(Inst->getOpcode(),Left,
+                         cast<CastInst>(Inst)->getDestTy(),
+                         cast<CastInst>(Inst)->getSrcTy());
+    break;
   case Instruction::Trunc:
   case Instruction::ZExt:
-  case Instruction::SExt:
   case Instruction::FPTrunc:
   case Instruction::FPExt:
   case Instruction::UIToFP:

Modified: llvm/trunk/lib/Target/MSIL/MSILWriter.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/MSIL/MSILWriter.h?rev=75629&r1=75628&r2=75629&view=diff

==============================================================================
--- llvm/trunk/lib/Target/MSIL/MSILWriter.h (original)
+++ llvm/trunk/lib/Target/MSIL/MSILWriter.h Tue Jul 14 04:53:14 2009
@@ -187,7 +187,7 @@
     void printIndirectSave(const Type* Ty);
 
     void printCastInstruction(unsigned int Op, const Value* V,
-                              const Type* Ty);
+                              const Type* Ty, const Type* SrcTy=0);
 
     void printGepInstruction(const Value* V, gep_type_iterator I,
                              gep_type_iterator E);