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Put the shiny new MCSubRegIterator to work. 

llvm-svn: 157783
This commit is contained in:
Chad Rosier 2012-06-01 00:02:08 +00:00
parent 34fab5598d
commit 526772de29
1 changed files with 6 additions and 8 deletions
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14
llvm/lib/Target/X86/X86RegisterInfo.cpp
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@ -275,21 +275,19 @@ BitVector X86RegisterInfo::getReservedRegs(const MachineFunction &MF) const {
// Set the stack-pointer register and its aliases as reserved.
Reserved.set(X86::RSP);
Reserved.set(X86::ESP);
Reserved.set(X86::SP);
Reserved.set(X86::SPL);
for (MCSubRegIterator I(X86::RSP, this); I.isValid(); ++I)
Reserved.set(*I);
// Set the instruction pointer register and its aliases as reserved.
Reserved.set(X86::RIP);
Reserved.set(X86::EIP);
Reserved.set(X86::IP);
for (MCSubRegIterator I(X86::RIP, this); I.isValid(); ++I)
Reserved.set(*I);
// Set the frame-pointer register and its aliases as reserved if needed.
if (TFI->hasFP(MF)) {
Reserved.set(X86::RBP);
Reserved.set(X86::EBP);
Reserved.set(X86::BP);
Reserved.set(X86::BPL);
for (MCSubRegIterator I(X86::RBP, this); I.isValid(); ++I)
Reserved.set(*I);
}
// Mark the segment registers as reserved.