From 6cf6c79e8281835898cd105a30efedd44b554000 Mon Sep 17 00:00:00 2001
From: Bill Wendling <isanbard@gmail.com>
Date: Mon, 4 Oct 2010 20:24:01 +0000
Subject: The pshufw instruction came about in MMX2 when SSE was introduced.
 Don't place it in with the SSSE3 instructions.

Steward! Could you place this chair by the aft sun deck? I'm trying to get away
from the Astors. They are such boors!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115552 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/VMCore/AutoUpgrade.cpp | 44 +++++++++++++++++++++++++++++++++++++-------
 1 file changed, 37 insertions(+), 7 deletions(-)

(limited to 'lib/VMCore')

diff --git a/lib/VMCore/AutoUpgrade.cpp b/lib/VMCore/AutoUpgrade.cpp
index 5b5955d..64b0b51 100644
--- a/lib/VMCore/AutoUpgrade.cpp
+++ b/lib/VMCore/AutoUpgrade.cpp
@@ -528,6 +528,16 @@ static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
       // or 0.
       NewFn = 0;
       return true;           
+    } else if (Name.compare(5, 17, "x86.ssse3.pshuf.w", 17) == 0) {
+      // This is an SSE/MMX instruction.
+      const Type *X86_MMXTy = VectorType::getX86_MMXTy(FTy->getContext());
+      NewFn =
+        cast<Function>(M->getOrInsertFunction("llvm.x86.sse.pshuf.w",
+                                              X86_MMXTy,
+                                              X86_MMXTy,
+                                              Type::getInt8Ty(F->getContext()),
+                                              (Type*)0));
+      return true;
     }
 
     break;
@@ -631,22 +641,23 @@ static void ConstructNewCallInst(Function *NewFn, CallInst *OldCI,
   NewCI->setTailCall(OldCI->isTailCall());
   NewCI->setCallingConv(OldCI->getCallingConv());
 
-  // Handle any uses of the old CallInst.
+  // Handle any uses of the old CallInst. If the type has changed, add a cast.
   if (!OldCI->use_empty()) {
-    // If the type has changed, add a cast.
-    Instruction *I = OldCI;
     if (OldCI->getType() != NewCI->getType()) {
       Function *OldFn = OldCI->getCalledFunction();
       CastInst *RetCast =
         CastInst::Create(CastInst::getCastOpcode(NewCI, true,
                                                  OldFn->getReturnType(), true),
                          NewCI, OldFn->getReturnType(), NewCI->getName(),OldCI);
-      I = RetCast;
+
+      // Replace all uses of the old call with the new cast which has the
+      // correct type.
+      OldCI->replaceAllUsesWith(RetCast);
+    } else {
+      OldCI->replaceAllUsesWith(NewCI);
     }
-    // Replace all uses of the old call with the new cast which has the 
-    // correct type.
-    OldCI->replaceAllUsesWith(I);
   }
+
   // Clean up the old call now that it has been completely upgraded.
   OldCI->eraseFromParent();
 }
@@ -1150,6 +1161,25 @@ void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
     ConstructNewCallInst(NewFn, CI, Operands, 3);
     break;
   }
+  case Intrinsic::x86_sse_pshuf_w: {
+    IRBuilder<> Builder(C);
+    Builder.SetInsertPoint(CI->getParent(), CI);
+
+    // Cast the operand to the X86 MMX type.
+    Value *Operands[2];
+    Operands[0] =
+      Builder.CreateBitCast(CI->getArgOperand(0), 
+                            NewFn->getFunctionType()->getParamType(0),
+                            "upgraded.");
+    Operands[1] =
+      Builder.CreateTrunc(CI->getArgOperand(1),
+                          Type::getInt8Ty(C),
+                          "upgraded.");
+
+    ConstructNewCallInst(NewFn, CI, Operands, 2);
+    break;
+  }
+
 #if 0
   case Intrinsic::x86_mmx_cvtsi32_si64: {
     // The return type needs to be changed.
-- 
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