[llvm-commits] [llvm] r47812 - /llvm/trunk/lib/Target/CBackend/CBackend.cpp

[Chris Lattner]

Author: lattner
Date: Sat Mar  1 21:57:08 2008
New Revision: 47812

URL: http://llvm.org/viewvc/llvm-project?rev=47812&view=rev
Log:
implement extractelement.

Modified:
    llvm/trunk/lib/Target/CBackend/CBackend.cpp

Modified: llvm/trunk/lib/Target/CBackend/CBackend.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/CBackend/CBackend.cpp?rev=47812&r1=47811&r2=47812&view=diff

==============================================================================
--- llvm/trunk/lib/Target/CBackend/CBackend.cpp (original)
+++ llvm/trunk/lib/Target/CBackend/CBackend.cpp Sat Mar  1 21:57:08 2008
@@ -191,8 +191,10 @@
         // Don't inline a load across a store or other bad things!
         return false;
 
-      // Must not be used in inline asm
-      if (I.hasOneUse() && isInlineAsm(*I.use_back())) return false;
+      // Must not be used in inline asm or extractelement.
+      if (I.hasOneUse() && 
+          (isInlineAsm(*I.use_back()) || isa<ExtractElementInst>(I)))
+        return false;
 
       // Only inline instruction it if it's use is in the same BB as the inst.
       return I.getParent() == cast<Instruction>(I.use_back())->getParent();
@@ -253,6 +255,7 @@
     void visitVAArgInst (VAArgInst &I);
     
     void visitInsertElementInst(InsertElementInst &I);
+    void visitExtractElementInst(ExtractElementInst &I);
 
     void visitInstruction(Instruction &I) {
       cerr << "C Writer does not know about " << I;
@@ -3037,6 +3040,18 @@
   Out << ")";
 }
 
+void CWriter::visitExtractElementInst(ExtractElementInst &I) {
+  // We know that our operand is not inlined.
+  Out << "((";
+  const Type *EltTy = 
+    cast<VectorType>(I.getOperand(0)->getType())->getElementType();
+  printType(Out, PointerType::getUnqual(EltTy));
+  Out << ")(&" << GetValueName(I.getOperand(0)) << "))[";
+  writeOperand(I.getOperand(1));
+  Out << "]";
+}
+
+
 
 //===----------------------------------------------------------------------===//
 //                       External Interface declaration