[llvm-commits] [llvm] r135635 - /llvm/trunk/lib/Target/X86/X86FrameLowering.cpp

[Bill Wendling]

Author: void
Date: Wed Jul 20 18:07:42 2011
New Revision: 135635

URL: http://llvm.org/viewvc/llvm-project?rev=135635&view=rev
Log:
Remove unused function.

Modified:
    llvm/trunk/lib/Target/X86/X86FrameLowering.cpp

Modified: llvm/trunk/lib/Target/X86/X86FrameLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86FrameLowering.cpp?rev=135635&r1=135634&r2=135635&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86FrameLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86FrameLowering.cpp Wed Jul 20 18:07:42 2011
@@ -370,7 +370,6 @@
   unsigned SlotSize = RegInfo->getSlotSize();
   unsigned FramePtr = RegInfo->getFrameRegister(MF);
   unsigned StackPtr = RegInfo->getStackRegister();
-
   DebugLoc DL;
 
   // If we're forcing a stack realignment we can't rely on just the frame
@@ -1013,66 +1012,3 @@
     FrameIdx = 0;
   }
 }
-
-/// permuteEncode - Create the permutation encoding used with frameless
-/// stacks. It is passed the number of registers to be saved and an array of the
-/// registers saved.
-static uint32_t permuteEncode(unsigned SavedCount, unsigned Registers[6]) {
-  // The saved registers are numbered from 1 to 6. In order to encode the order
-  // in which they were saved, we re-number them according to their place in the
-  // register order. The re-numbering is relative to the last re-numbered
-  // register. E.g., if we have registers {6, 2, 4, 5} saved in that order:
-  //
-  //    Orig  Re-Num
-  //    ----  ------
-  //     6       6
-  //     2       2
-  //     4       3
-  //     5       3
-  //
-  bool Used[7] = { false, false, false, false, false, false, false };
-  uint32_t RenumRegs[6];
-  for (unsigned I = 0; I < SavedCount; ++I) {
-    uint32_t Renum = 0;
-    for (unsigned U = 1; U < 7; ++U) {
-      if (U == Registers[I])
-        break;
-      if (!Used[U])
-        ++Renum;
-    }
-
-    Used[Registers[I]] = true;
-    RenumRegs[I] = Renum;
-  }
-
-  // Take the renumbered values and encode them into a 10-bit number.
-  uint32_t permutationEncoding = 0;
-  switch (SavedCount) {
-  case 6:
-    permutationEncoding |= 120 * RenumRegs[0] + 24 * RenumRegs[1]
-                           + 6 * RenumRegs[2] +  2 * RenumRegs[3]
-                           +     RenumRegs[4];
-    break;
-  case 5:
-    permutationEncoding |= 120 * RenumRegs[0] + 24 * RenumRegs[1]
-                           + 6 * RenumRegs[2] +  2 * RenumRegs[3]
-                           +     RenumRegs[4];
-    break;
-  case 4:
-    permutationEncoding |= 60 * RenumRegs[0] + 12 * RenumRegs[1]
-                          + 3 * RenumRegs[2] +      RenumRegs[3];
-    break;
-  case 3:
-    permutationEncoding |= 20 * RenumRegs[0] + 4 * RenumRegs[1]
-                              + RenumRegs[2];
-    break;
-  case 2:
-    permutationEncoding |=  5 * RenumRegs[0] +     RenumRegs[1];
-    break;
-  case 1:
-    permutationEncoding |=      RenumRegs[0];
-    break;
-  }
-
-  return permutationEncoding;
-}