1 files changed, 23 insertions, 3 deletions

diff --git a/contrib/llvm/lib/Target/X86/X86ExpandPseudo.cpp b/contrib/llvm/lib/Target/X86/X86ExpandPseudo.cpp
index 985acf9..5dfd95f 100644
--- a/contrib/llvm/lib/Target/X86/X86ExpandPseudo.cpp
+++ b/contrib/llvm/lib/Target/X86/X86ExpandPseudo.cpp
@@ -77,9 +77,11 @@ bool X86ExpandPseudo::ExpandMI(MachineBasicBlock &MBB,
   default:
     return false;
   case X86::TCRETURNdi:
+  case X86::TCRETURNdicc:
   case X86::TCRETURNri:
   case X86::TCRETURNmi:
   case X86::TCRETURNdi64:
+  case X86::TCRETURNdi64cc:
   case X86::TCRETURNri64:
   case X86::TCRETURNmi64: {
     bool isMem = Opcode == X86::TCRETURNmi || Opcode == X86::TCRETURNmi64;
@@ -97,6 +99,10 @@ bool X86ExpandPseudo::ExpandMI(MachineBasicBlock &MBB,
     Offset = StackAdj - MaxTCDelta;
     assert(Offset >= 0 && "Offset should never be negative");
 
+    if (Opcode == X86::TCRETURNdicc || Opcode == X86::TCRETURNdi64cc) {
+      assert(Offset == 0 && "Conditional tail call cannot adjust the stack.");
+    }
+
     if (Offset) {
       // Check for possible merge with preceding ADD instruction.
       Offset += X86FL->mergeSPUpdates(MBB, MBBI, true);
@@ -105,12 +111,22 @@ bool X86ExpandPseudo::ExpandMI(MachineBasicBlock &MBB,
 
     // Jump to label or value in register.
     bool IsWin64 = STI->isTargetWin64();
-    if (Opcode == X86::TCRETURNdi || Opcode == X86::TCRETURNdi64) {
+    if (Opcode == X86::TCRETURNdi || Opcode == X86::TCRETURNdicc ||
+        Opcode == X86::TCRETURNdi64 || Opcode == X86::TCRETURNdi64cc) {
       unsigned Op;
       switch (Opcode) {
       case X86::TCRETURNdi:
         Op = X86::TAILJMPd;
         break;
+      case X86::TCRETURNdicc:
+        Op = X86::TAILJMPd_CC;
+        break;
+      case X86::TCRETURNdi64cc:
+        assert(!MBB.getParent()->hasWinCFI() &&
+               "Conditional tail calls confuse "
+               "the Win64 unwinder.");
+        Op = X86::TAILJMPd64_CC;
+        break;
       default:
         // Note: Win64 uses REX prefixes indirect jumps out of functions, but
         // not direct ones.
@@ -126,13 +142,17 @@ bool X86ExpandPseudo::ExpandMI(MachineBasicBlock &MBB,
         MIB.addExternalSymbol(JumpTarget.getSymbolName(),
                               JumpTarget.getTargetFlags());
       }
+      if (Op == X86::TAILJMPd_CC || Op == X86::TAILJMPd64_CC) {
+        MIB.addImm(MBBI->getOperand(2).getImm());
+      }
+
     } else if (Opcode == X86::TCRETURNmi || Opcode == X86::TCRETURNmi64) {
       unsigned Op = (Opcode == X86::TCRETURNmi)
                         ? X86::TAILJMPm
                         : (IsWin64 ? X86::TAILJMPm64_REX : X86::TAILJMPm64);
       MachineInstrBuilder MIB = BuildMI(MBB, MBBI, DL, TII->get(Op));
       for (unsigned i = 0; i != 5; ++i)
-        MIB.addOperand(MBBI->getOperand(i));
+        MIB.add(MBBI->getOperand(i));
     } else if (Opcode == X86::TCRETURNri64) {
       BuildMI(MBB, MBBI, DL,
               TII->get(IsWin64 ? X86::TAILJMPr64_REX : X86::TAILJMPr64))
@@ -195,7 +215,7 @@ bool X86ExpandPseudo::ExpandMI(MachineBasicBlock &MBB,
       MIB = BuildMI(MBB, MBBI, DL, TII->get(X86::RETL));
     }
     for (unsigned I = 1, E = MBBI->getNumOperands(); I != E; ++I)
-      MIB.addOperand(MBBI->getOperand(I));
+      MIB.add(MBBI->getOperand(I));
     MBB.erase(MBBI);
     return true;
   }