Remove code that pad number of bytes to pop for X86_FastCall CC. The code doesn't do the "aligning" for Cygwin, Mingw, and Windows. But aligning it on Darwin and Linux breaks gcc compatibility. That ruled out all the platforms we support!

llvm-svn: 55756

1 files changed, 0 insertions, 15 deletions

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 9b492fbb1d8..cd01c644260 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -1379,14 +1379,6 @@ X86TargetLowering::LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG) {
     }
   }
   
-  // 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 (!Is64Bit && CC == CallingConv::X86_FastCall &&
-      !Subtarget->isTargetCygMing() && !Subtarget->isTargetWindows() &&
-      (StackSize & 7) == 0)
-    StackSize += 4;
-
   ArgValues.push_back(Root);
 
   // Some CCs need callee pop.
@@ -1494,13 +1486,6 @@ SDValue X86TargetLowering::LowerCALL(SDValue Op, SelectionDAG &DAG) {
   if (CC == CallingConv::Fast)
     NumBytes = GetAlignedArgumentStackSize(NumBytes, DAG);
 
-  // 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 (!Is64Bit && CC == CallingConv::X86_FastCall &&
-      !Subtarget->isTargetCygMing() && !Subtarget->isTargetWindows() &&
-      (NumBytes & 7) == 0)
-    NumBytes += 4;
-
   int FPDiff = 0;
   if (IsTailCall) {
     // Lower arguments at fp - stackoffset + fpdiff.