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

2 files changed, 40 insertions, 10 deletions

diff --git a/lib/Target/X86/X86InstrMMX.td b/lib/Target/X86/X86InstrMMX.td
index c78099e..bb2165a 100644
--- a/lib/Target/X86/X86InstrMMX.td
+++ b/lib/Target/X86/X86InstrMMX.td
@@ -342,13 +342,13 @@ def MMX_PSHUFWri : MMXIi8<0x70, MRMSrcReg,
                           (outs VR64:$dst), (ins VR64:$src1, i8imm:$src2),
                           "pshufw\t{$src2, $src1, $dst|$dst, $src1, $src2}",
                           [(set VR64:$dst,
-                             (int_x86_ssse3_pshuf_w VR64:$src1, imm:$src2))]>;
+                             (int_x86_sse_pshuf_w VR64:$src1, imm:$src2))]>;
 def MMX_PSHUFWmi : MMXIi8<0x70, MRMSrcMem,
                           (outs VR64:$dst), (ins i64mem:$src1, i8imm:$src2),
                           "pshufw\t{$src2, $src1, $dst|$dst, $src1, $src2}",
                           [(set VR64:$dst,
-                             (int_x86_ssse3_pshuf_w (load_mmx addr:$src1),
-                                                    imm:$src2))]>;
+                             (int_x86_sse_pshuf_w (load_mmx addr:$src1),
+                                                   imm:$src2))]>;
 
 
 
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.