From: Chris Lattner <sabre@nondot.org>
Date: Fri, 3 Aug 2007 16:37:04 +0000 (+0000)
Subject: implement codegen for multidest ocuvector expressions, like:
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7e6b51b673997d7046f06caf09134dbd0a434a5e;p=clang

implement codegen for multidest ocuvector expressions, like:

   vec2.yx = vec2; // reverse



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@40782 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/CodeGen/CGExpr.cpp b/CodeGen/CGExpr.cpp
index 32cb02d644..9f834a7bde 100644
--- a/CodeGen/CGExpr.cpp
+++ b/CodeGen/CGExpr.cpp
@@ -427,16 +427,25 @@ void CodeGenFunction::EmitStoreThroughOCUComponentLValue(RValue Src, LValue Dst,
   
   llvm::Value *SrcVal = Src.getVal();
   
-  // If the Src is a scalar (not a vector) it must be updating a single element.
-  if (!Ty->isVectorType()) {
+  if (const VectorType *VTy = Ty->getAsVectorType()) {
+    unsigned NumSrcElts = VTy->getNumElements();
+
+    // Extract/Insert each element.
+    for (unsigned i = 0; i != NumSrcElts; ++i) {
+      llvm::Value *Elt = llvm::ConstantInt::get(llvm::Type::Int32Ty, i);
+      Elt = Builder.CreateExtractElement(SrcVal, Elt, "tmp");
+      
+      unsigned Idx = OCUVectorComponent::getAccessedFieldNo(i, EncFields);
+      llvm::Value *OutIdx = llvm::ConstantInt::get(llvm::Type::Int32Ty, Idx);
+      Vec = Builder.CreateInsertElement(Vec, Elt, OutIdx, "tmp");
+    }
+  } else {
+    // If the Src is a scalar (not a vector) it must be updating one element.
     unsigned InIdx = OCUVectorComponent::getAccessedFieldNo(0, EncFields);
     llvm::Value *Elt = llvm::ConstantInt::get(llvm::Type::Int32Ty, InIdx);
     Vec = Builder.CreateInsertElement(Vec, SrcVal, Elt, "tmp");
-  } else {
-    
   }
   
-  
   Builder.CreateStore(Vec, Dst.getOCUVectorAddr());
 }