Simplify things

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34849 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 2fb89c3282953acca75e053c51610d4a413ae6b1..29db36bf32f04e6b090e6cf89e7fa92eb06beec6 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -30,16 +30,11 @@
 #include "llvm/CodeGen/MachineInstrBuilder.h"
 #include "llvm/CodeGen/SelectionDAG.h"
 #include "llvm/CodeGen/SSARegMap.h"
-#include "llvm/Support/CommandLine.h"
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Target/TargetOptions.h"
 #include "llvm/ADT/StringExtras.h"
 using namespace llvm;
 
-static cl::opt<bool> FastCallAlignStack("x86-fastcc-align-stack", cl::Hidden,
-             cl::desc("Align stack to 8-byte boundary for fastcall function"),
-                                        cl::init(false));
-
 X86TargetLowering::X86TargetLowering(TargetMachine &TM)
   : TargetLowering(TM) {
   Subtarget = &TM.getSubtarget<X86Subtarget>();
@@ -909,7 +904,7 @@ X86TargetLowering::LowerFastCCArguments(SDOperand Op, SelectionDAG &DAG) {
 
   unsigned StackSize = CCInfo.getNextStackOffset();
 
-  if (FastCallAlignStack) {
+  if (!Subtarget->isTargetCygMing() && !Subtarget->isTargetWindows()) {
     // Make sure the instruction takes 8n+4 bytes to make sure the start of the
     // arguments and the arguments after the retaddr has been pushed are aligned.
     if ((StackSize & 7) == 0)
@@ -943,7 +938,7 @@ SDOperand X86TargetLowering::LowerFastCCCallTo(SDOperand Op, SelectionDAG &DAG,
   // Get a count of how many bytes are to be pushed on the stack.
   unsigned NumBytes = CCInfo.getNextStackOffset();
 
-  if (FastCallAlignStack) {
+  if (!Subtarget->isTargetCygMing() && !Subtarget->isTargetWindows()) {
     // Make sure the instruction takes 8n+4 bytes to make sure the start of the
     // arguments and the arguments after the retaddr has been pushed are aligned.
     if ((NumBytes & 7) == 0)
@@ -951,7 +946,6 @@ SDOperand X86TargetLowering::LowerFastCCCallTo(SDOperand Op, SelectionDAG &DAG,
   }
 
   Chain = DAG.getCALLSEQ_START(Chain,DAG.getConstant(NumBytes, getPointerTy()));
-
   
   SmallVector<std::pair<unsigned, SDOperand>, 8> RegsToPass;
   SmallVector<SDOperand, 8> MemOpChains;