'HiReg' is written but never read. Nuke its

declaration and its assignments.

Found by clang static analyzer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123486 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelDAGToDAG.cpp b/lib/Target/X86/X86ISelDAGToDAG.cpp
index dd751fad35cf89e6050183a94641642a3c3698ed..d9e8980d965504485b8e24b2e64dbe5ab62f71df 100644 (file)
--- a/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -1607,13 +1607,13 @@ SDNode *X86DAGToDAGISel::Select(SDNode *Node) {
     SDValue N0 = Node->getOperand(0);
     SDValue N1 = Node->getOperand(1);
     
-    unsigned LoReg, HiReg;
+    unsigned LoReg;
     switch (NVT.getSimpleVT().SimpleTy) {
     default: llvm_unreachable("Unsupported VT!");
-    case MVT::i8:  LoReg = X86::AL;  HiReg = X86::AH;  Opc = X86::MUL8r; break;
-    case MVT::i16: LoReg = X86::AX;  HiReg = X86::DX;  Opc = X86::MUL16r; break;
-    case MVT::i32: LoReg = X86::EAX; HiReg = X86::EDX; Opc = X86::MUL32r; break;
-    case MVT::i64: LoReg = X86::RAX; HiReg = X86::RDX; Opc = X86::MUL64r; break;
+    case MVT::i8:  LoReg = X86::AL;  Opc = X86::MUL8r; break;
+    case MVT::i16: LoReg = X86::AX;  Opc = X86::MUL16r; break;
+    case MVT::i32: LoReg = X86::EAX; Opc = X86::MUL32r; break;
+    case MVT::i64: LoReg = X86::RAX; Opc = X86::MUL64r; break;
     }
     
     SDValue InFlag = CurDAG->getCopyToReg(CurDAG->getEntryNode(), dl, LoReg,