[llvm-commits] [llvm-gcc-4.2] r41981 - /llvm-gcc-4.2/trunk/gcc/llvm-convert.cpp

[Chris Lattner]

Author: lattner
Date: Sat Sep 15 00:47:38 2007
New Revision: 41981

URL: http://llvm.org/viewvc/llvm-project?rev=41981&view=rev
Log:
Fix PR1662 by handling pointer negate_expr.

Modified:
    llvm-gcc-4.2/trunk/gcc/llvm-convert.cpp

Modified: llvm-gcc-4.2/trunk/gcc/llvm-convert.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm-gcc-4.2/trunk/gcc/llvm-convert.cpp?rev=41981&r1=41980&r2=41981&view=diff

==============================================================================
--- llvm-gcc-4.2/trunk/gcc/llvm-convert.cpp (original)
+++ llvm-gcc-4.2/trunk/gcc/llvm-convert.cpp Sat Sep 15 00:47:38 2007
@@ -2683,8 +2683,17 @@
 }
 
 Value *TreeToLLVM::EmitNEGATE_EXPR(tree exp, Value *DestLoc) {
-  if (!DestLoc)
-    return Builder.CreateNeg(Emit(TREE_OPERAND(exp, 0), 0), "tmp");
+  if (!DestLoc) {
+    Value *V = Emit(TREE_OPERAND(exp, 0), 0);
+    if (!isa<PointerType>(V->getType()))
+      return Builder.CreateNeg(V, "tmp");
+    
+    // GCC allows NEGATE_EXPR on pointers as well.  Cast to int, negate, cast
+    // back.
+    V = CastToAnyType(V, false, TD.getIntPtrType(), false);
+    V = Builder.CreateNeg(V, "tmp");
+    return CastToType(Instruction::IntToPtr, V, ConvertType(TREE_TYPE(exp)));
+  }
   
   // Emit the operand to a temporary.
   const Type *ComplexTy=cast<PointerType>(DestLoc->getType())->getElementType();