Make fast isel win64-aware w.r.t. call-clobbered regs

llvm-svn: 109069

1 files changed, 14 insertions, 3 deletions

diff --git a/llvm/lib/Target/X86/X86FastISel.cpp b/llvm/lib/Target/X86/X86FastISel.cpp
index 89f72151bce..b7341f93eed 100644
--- a/llvm/lib/Target/X86/X86FastISel.cpp
+++ b/llvm/lib/Target/X86/X86FastISel.cpp
@@ -1646,15 +1646,26 @@ bool X86FastISel::X86SelectCall(const Instruction *I) {
   MachineInstrBuilder MIB;
   if (CalleeOp) {
     // Register-indirect call.
-    unsigned CallOpc = Subtarget->is64Bit() ? X86::CALL64r : X86::CALL32r;
+    unsigned CallOpc;
+    if (Subtarget->isTargetWin64())
+      CallOpc = X86::WINCALL64r;
+    else if (Subtarget->is64Bit())
+      CallOpc = X86::CALL64r;
+    else
+      CallOpc = X86::CALL32r;
     MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(CallOpc))
       .addReg(CalleeOp);
     
   } else {
     // Direct call.
     assert(GV && "Not a direct call");
-    unsigned CallOpc =
-      Subtarget->is64Bit() ? X86::CALL64pcrel32 : X86::CALLpcrel32;
+    unsigned CallOpc;
+    if (Subtarget->isTargetWin64())
+      CallOpc = X86::WINCALL64pcrel32;
+    else if (Subtarget->is64Bit())
+      CallOpc = X86::CALL64pcrel32;
+    else
+      CallOpc = X86::CALLpcrel32;
     
     // See if we need any target-specific flags on the GV operand.
     unsigned char OpFlags = 0;