Pull in r227752 from upstream llvm trunk (by Michael Kuperstein):

  [X86] Convert esp-relative movs of function arguments to pushes, step 2

  This moves the transformation introduced in r223757 into a separate MI pass.
  This allows it to cover many more cases (not only cases where there must be a
  reserved call frame), and perform rudimentary call folding. It still doesn't
  have a heuristic, so it is enabled only for optsize/minsize, with stack
  alignment <= 8, where it ought to be a fairly clear win.

  (Re-commit of r227728)

  Differential Revision: http://reviews.llvm.org/D6789

This helps to get sys/boot/i386/boot2 below the required size again,
when optimizing with -Oz.

1 files changed, 5 insertions, 0 deletions

diff --git a/contrib/llvm/include/llvm/Target/TargetFrameLowering.h b/contrib/llvm/include/llvm/Target/TargetFrameLowering.h
index 277bd98..f17640f 100644
--- a/contrib/llvm/include/llvm/Target/TargetFrameLowering.h
+++ b/contrib/llvm/include/llvm/Target/TargetFrameLowering.h
@@ -193,6 +193,11 @@ public:
     return hasReservedCallFrame(MF) || hasFP(MF);
   }
 
+  // needsFrameIndexResolution - Do we need to perform FI resolution for
+  // this function. Normally, this is required only when the function
+  // has any stack objects. However, targets may want to override this.
+  virtual bool needsFrameIndexResolution(const MachineFunction &MF) const;
+
   /// getFrameIndexOffset - Returns the displacement from the frame register to
   /// the stack frame of the specified index.
   virtual int getFrameIndexOffset(const MachineFunction &MF, int FI) const;