From: Bill Wendling <isanbard@gmail.com>
Date: Wed, 13 Apr 2011 00:36:37 +0000 (+0000)
Subject: Convert the unaligned load builtins to the first-class versions.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=aa48244cc043b1bcf166635745481d0d7f4f6838;p=clang

Convert the unaligned load builtins to the first-class versions.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129420 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index af8d37a221..fce2bf40ee 100644
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/lib/CodeGen/CGBuiltin.cpp
@@ -2092,6 +2092,19 @@ Value *CodeGenFunction::EmitX86BuiltinExpr(unsigned BuiltinID,
     // If palignr is shifting the pair of vectors more than 32 bytes, emit zero.
     return llvm::Constant::getNullValue(ConvertType(E->getType()));
   }
+  case X86::BI__builtin_ia32_loadups:
+  case X86::BI__builtin_ia32_loadupd:
+  case X86::BI__builtin_ia32_loaddqu: {
+    const llvm::Type *VecTy = ConvertType(E->getType());
+    const llvm::Type *IntTy = llvm::IntegerType::get(getLLVMContext(), 128);
+
+    Value *BC = Builder.CreateBitCast(Ops[0],
+                                      llvm::PointerType::getUnqual(IntTy),
+                                      "cast");
+    LoadInst *LI = Builder.CreateLoad(BC);
+    LI->setAlignment(1); // Unaligned load.
+    return Builder.CreateBitCast(LI, VecTy, "loadu.cast");
+  }
   }
 }