Use the same CALL instructions for Windows as for everything else.

The different calling conventions and call-preserved registers are
represented with regmask operands that are added dynamically.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150708 91177308-0d34-0410-b5e6-96231b3b80d8

9 files changed, 32 insertions, 87 deletions

diff --git a/lib/Target/X86/X86CodeEmitter.cpp b/lib/Target/X86/X86CodeEmitter.cpp
index ed16e882ad..a802fc2c94 100644
--- a/lib/Target/X86/X86CodeEmitter.cpp
+++ b/lib/Target/X86/X86CodeEmitter.cpp
@@ -806,8 +806,7 @@ void Emitter<CodeEmitter>::emitInstruction(MachineInstr &MI,
     }
     
     assert(MO.isImm() && "Unknown RawFrm operand!");
-    if (Opcode == X86::CALLpcrel32 || Opcode == X86::CALL64pcrel32 ||
-        Opcode == X86::WINCALL64pcrel32) {
+    if (Opcode == X86::CALLpcrel32 || Opcode == X86::CALL64pcrel32) {
       // Fix up immediate operand for pc relative calls.
       intptr_t Imm = (intptr_t)MO.getImm();
       Imm = Imm - MCE.getCurrentPCValue() - 4;
diff --git a/lib/Target/X86/X86FastISel.cpp b/lib/Target/X86/X86FastISel.cpp
index 6ab218a9d6..efc4c06456 100644
--- a/lib/Target/X86/X86FastISel.cpp
+++ b/lib/Target/X86/X86FastISel.cpp
@@ -1793,9 +1793,7 @@ bool X86FastISel::DoSelectCall(const Instruction *I, const char *MemIntName) {
   if (CalleeOp) {
     // Register-indirect call.
     unsigned CallOpc;
-    if (Subtarget->isTargetWin64())
-      CallOpc = X86::WINCALL64r;
-    else if (Subtarget->is64Bit())
+    if (Subtarget->is64Bit())
       CallOpc = X86::CALL64r;
     else
       CallOpc = X86::CALL32r;
@@ -1806,9 +1804,7 @@ bool X86FastISel::DoSelectCall(const Instruction *I, const char *MemIntName) {
     // Direct call.
     assert(GV && "Not a direct call");
     unsigned CallOpc;
-    if (Subtarget->isTargetWin64())
-      CallOpc = X86::WINCALL64pcrel32;
-    else if (Subtarget->is64Bit())
+    if (Subtarget->is64Bit())
       CallOpc = X86::CALL64pcrel32;
     else
       CallOpc = X86::CALLpcrel32;
diff --git a/lib/Target/X86/X86ISelDAGToDAG.cpp b/lib/Target/X86/X86ISelDAGToDAG.cpp
index 16f9c46c68..05af453e2a 100644
--- a/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -540,7 +540,7 @@ void X86DAGToDAGISel::EmitSpecialCodeForMain(MachineBasicBlock *BB,
   const TargetInstrInfo *TII = TM.getInstrInfo();
   if (Subtarget->isTargetCygMing()) {
     unsigned CallOp =
-      Subtarget->is64Bit() ? X86::WINCALL64pcrel32 : X86::CALLpcrel32;
+      Subtarget->is64Bit() ? X86::CALL64pcrel32 : X86::CALLpcrel32;
     BuildMI(BB, DebugLoc(),
             TII->get(CallOp)).addExternalSymbol("__main");
   }
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 18eba7b0d1..b251913b01 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -12391,22 +12391,6 @@ X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
   case X86::TCRETURNdi64:
   case X86::TCRETURNri64:
   case X86::TCRETURNmi64:
-    // Defs of TCRETURNxx64 has Win64's callee-saved registers, as subset.
-    // On AMD64, additional defs should be added before register allocation.
-    if (!Subtarget->isTargetWin64()) {
-      MI->addRegisterDefined(X86::RSI);
-      MI->addRegisterDefined(X86::RDI);
-      MI->addRegisterDefined(X86::XMM6);
-      MI->addRegisterDefined(X86::XMM7);
-      MI->addRegisterDefined(X86::XMM8);
-      MI->addRegisterDefined(X86::XMM9);
-      MI->addRegisterDefined(X86::XMM10);
-      MI->addRegisterDefined(X86::XMM11);
-      MI->addRegisterDefined(X86::XMM12);
-      MI->addRegisterDefined(X86::XMM13);
-      MI->addRegisterDefined(X86::XMM14);
-      MI->addRegisterDefined(X86::XMM15);
-    }
     return BB;
   case X86::WIN_ALLOCA:
     return EmitLoweredWinAlloca(MI, BB);
diff --git a/lib/Target/X86/X86InstrCompiler.td b/lib/Target/X86/X86InstrCompiler.td
index 1106b85b3e..ce0a885083 100644
--- a/lib/Target/X86/X86InstrCompiler.td
+++ b/lib/Target/X86/X86InstrCompiler.td
@@ -945,14 +945,9 @@ def : Pat<(load (i64 (X86Wrapper tglobaltlsaddr :$dst))),
 // Direct PC relative function call for small code model. 32-bit displacement
 // sign extended to 64-bit.
 def : Pat<(X86call (i64 tglobaladdr:$dst)),
-          (CALL64pcrel32 tglobaladdr:$dst)>, Requires<[NotWin64]>;
+          (CALL64pcrel32 tglobaladdr:$dst)>;
 def : Pat<(X86call (i64 texternalsym:$dst)),
-          (CALL64pcrel32 texternalsym:$dst)>, Requires<[NotWin64]>;
-
-def : Pat<(X86call (i64 tglobaladdr:$dst)),
-          (WINCALL64pcrel32 tglobaladdr:$dst)>, Requires<[IsWin64]>;
-def : Pat<(X86call (i64 texternalsym:$dst)),
-          (WINCALL64pcrel32 texternalsym:$dst)>, Requires<[IsWin64]>;
+          (CALL64pcrel32 texternalsym:$dst)>;
 
 // tailcall stuff
 def : Pat<(X86tcret GR32_TC:$dst, imm:$off),
diff --git a/lib/Target/X86/X86InstrControl.td b/lib/Target/X86/X86InstrControl.td
index b238391419..e17f0497be 100644
--- a/lib/Target/X86/X86InstrControl.td
+++ b/lib/Target/X86/X86InstrControl.td
@@ -204,55 +204,30 @@ let isCall = 1, isTerminator = 1, isReturn = 1, isBarrier = 1,
 //===----------------------------------------------------------------------===//
 //  Call Instructions...
 //
-let isCall = 1 in
-  // All calls clobber the non-callee saved registers. RSP is marked as
-  // a use to prevent stack-pointer assignments that appear immediately
-  // before calls from potentially appearing dead. Uses for argument
-  // registers are added manually.
-  let Uses = [RSP] in {
-
-    // NOTE: this pattern doesn't match "X86call imm", because we do not know
-    // that the offset between an arbitrary immediate and the call will fit in
-    // the 32-bit pcrel field that we have.
-    def CALL64pcrel32 : Ii32PCRel<0xE8, RawFrm,
-                          (outs), (ins i64i32imm_pcrel:$dst, variable_ops),
-                          "call{q}\t$dst", [], IIC_CALL_RI>,
-                        Requires<[In64BitMode, NotWin64]>;
-    def CALL64r       : I<0xFF, MRM2r, (outs), (ins GR64:$dst, variable_ops),
-                          "call{q}\t{*}$dst", [(X86call GR64:$dst)],
-                          IIC_CALL_RI>,
-                        Requires<[In64BitMode, NotWin64]>;
-    def CALL64m       : I<0xFF, MRM2m, (outs), (ins i64mem:$dst, variable_ops),
-                          "call{q}\t{*}$dst", [(X86call (loadi64 addr:$dst))],
-                          IIC_CALL_MEM>,
-                        Requires<[In64BitMode, NotWin64]>;
 
-    def FARCALL64   : RI<0xFF, MRM3m, (outs), (ins opaque80mem:$dst),
-                         "lcall{q}\t{*}$dst", [], IIC_CALL_FAR_MEM>;
-  }
+// RSP is marked as a use to prevent stack-pointer assignments that appear
+// immediately before calls from potentially appearing dead. Uses for argument
+// registers are added manually.
+let isCall = 1, Uses = [RSP] in {
+  // NOTE: this pattern doesn't match "X86call imm", because we do not know
+  // that the offset between an arbitrary immediate and the call will fit in
+  // the 32-bit pcrel field that we have.
+  def CALL64pcrel32 : Ii32PCRel<0xE8, RawFrm,
+                        (outs), (ins i64i32imm_pcrel:$dst, variable_ops),
+                        "call{q}\t$dst", [], IIC_CALL_RI>,
+                      Requires<[In64BitMode]>;
+  def CALL64r       : I<0xFF, MRM2r, (outs), (ins GR64:$dst, variable_ops),
+                        "call{q}\t{*}$dst", [(X86call GR64:$dst)],
+                        IIC_CALL_RI>,
+                      Requires<[In64BitMode]>;
+  def CALL64m       : I<0xFF, MRM2m, (outs), (ins i64mem:$dst, variable_ops),
+                        "call{q}\t{*}$dst", [(X86call (loadi64 addr:$dst))],
+                        IIC_CALL_MEM>,
+                      Requires<[In64BitMode]>;
 
-  // FIXME: We need to teach codegen about single list of call-clobbered
-  // registers.
-let isCall = 1, isCodeGenOnly = 1 in
-  // All calls clobber the non-callee saved registers. RSP is marked as
-  // a use to prevent stack-pointer assignments that appear immediately
-  // before calls from potentially appearing dead. Uses for argument
-  // registers are added manually.
-  let Uses = [RSP] in {
-    def WINCALL64pcrel32 : Ii32PCRel<0xE8, RawFrm,
-                             (outs), (ins i64i32imm_pcrel:$dst, variable_ops),
-                             "call{q}\t$dst", [], IIC_CALL_RI>,
-                           Requires<[IsWin64]>;
-    def WINCALL64r       : I<0xFF, MRM2r, (outs), (ins GR64:$dst, variable_ops),
-                             "call{q}\t{*}$dst",
-                             [(X86call GR64:$dst)], IIC_CALL_RI>,
-                           Requires<[IsWin64]>;
-    def WINCALL64m       : I<0xFF, MRM2m, (outs),
-                              (ins i64mem:$dst,variable_ops),
-                             "call{q}\t{*}$dst",
-                             [(X86call (loadi64 addr:$dst))], IIC_CALL_MEM>,
-                           Requires<[IsWin64]>;
-  }
+  def FARCALL64   : RI<0xFF, MRM3m, (outs), (ins opaque80mem:$dst),
+                       "lcall{q}\t{*}$dst", [], IIC_CALL_FAR_MEM>;
+}
 
 let isCall = 1, isCodeGenOnly = 1 in
   // __chkstk(MSVC):     clobber R10, R11 and EFLAGS.
diff --git a/lib/Target/X86/X86InstrInfo.cpp b/lib/Target/X86/X86InstrInfo.cpp
index b74dbedcb2..e14a7dc152 100644
--- a/lib/Target/X86/X86InstrInfo.cpp
+++ b/lib/Target/X86/X86InstrInfo.cpp
@@ -274,7 +274,6 @@ X86InstrInfo::X86InstrInfo(X86TargetMachine &tm)
     { X86::BT64ri8,     X86::BT64mi8,       TB_FOLDED_LOAD },
     { X86::CALL32r,     X86::CALL32m,       TB_FOLDED_LOAD },
     { X86::CALL64r,     X86::CALL64m,       TB_FOLDED_LOAD },
-    { X86::WINCALL64r,  X86::WINCALL64m,    TB_FOLDED_LOAD },
     { X86::CMP16ri,     X86::CMP16mi,       TB_FOLDED_LOAD },
     { X86::CMP16ri8,    X86::CMP16mi8,      TB_FOLDED_LOAD },
     { X86::CMP16rr,     X86::CMP16mr,       TB_FOLDED_LOAD },
diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td
index 8518ed07dc..5931f66476 100644
--- a/lib/Target/X86/X86InstrInfo.td
+++ b/lib/Target/X86/X86InstrInfo.td
@@ -523,7 +523,6 @@ def In32BitMode  : Predicate<"!Subtarget->is64Bit()">,
 def In64BitMode  : Predicate<"Subtarget->is64Bit()">,
                              AssemblerPredicate<"Mode64Bit">;
 def IsWin64      : Predicate<"Subtarget->isTargetWin64()">;
-def NotWin64     : Predicate<"!Subtarget->isTargetWin64()">;
 def IsNaCl       : Predicate<"Subtarget->isTargetNaCl()">;
 def NotNaCl      : Predicate<"!Subtarget->isTargetNaCl()">;
 def SmallCode    : Predicate<"TM.getCodeModel() == CodeModel::Small">;
diff --git a/lib/Target/X86/X86MCInstLower.cpp b/lib/Target/X86/X86MCInstLower.cpp
index c2c46986d2..a7a5c561ac 100644
--- a/lib/Target/X86/X86MCInstLower.cpp
+++ b/lib/Target/X86/X86MCInstLower.cpp
@@ -389,14 +389,12 @@ ReSimplify:
     LowerUnaryToTwoAddr(OutMI, X86::XOR32rr); // MOV32r0 -> XOR32rr
     break;
 
-  // TAILJMPr64, [WIN]CALL64r, [WIN]CALL64pcrel32 - These instructions have
-  // register inputs modeled as normal uses instead of implicit uses.  As such,
-  // truncate off all but the first operand (the callee).  FIXME: Change isel.
+  // TAILJMPr64, CALL64r, CALL64pcrel32 - These instructions have register
+  // inputs modeled as normal uses instead of implicit uses.  As such, truncate
+  // off all but the first operand (the callee).  FIXME: Change isel.
   case X86::TAILJMPr64:
   case X86::CALL64r:
-  case X86::CALL64pcrel32:
-  case X86::WINCALL64r:
-  case X86::WINCALL64pcrel32: {
+  case X86::CALL64pcrel32: {
     unsigned Opcode = OutMI.getOpcode();
     MCOperand Saved = OutMI.getOperand(0);
     OutMI = MCInst();