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Remove unused function.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135635 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2011-07-20 23:07:42 +00:00
parent 16da7366d5
commit 7bc3178182
1 changed files with 0 additions and 64 deletions
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64
lib/Target/X86/X86FrameLowering.cpp
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@ -370,7 +370,6 @@ void X86FrameLowering::emitPrologue(MachineFunction &MF) const {
unsigned SlotSize = RegInfo->getSlotSize(); unsigned SlotSize = RegInfo->getSlotSize();
unsigned FramePtr = RegInfo->getFrameRegister(MF); unsigned FramePtr = RegInfo->getFrameRegister(MF);
unsigned StackPtr = RegInfo->getStackRegister(); unsigned StackPtr = RegInfo->getStackRegister();
DebugLoc DL; DebugLoc DL;
// If we're forcing a stack realignment we can't rely on just the frame // If we're forcing a stack realignment we can't rely on just the frame
@ -1013,66 +1012,3 @@ X86FrameLowering::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
FrameIdx = 0; 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;
}