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Switch all register list clients to the new MC*Iterator interface.

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No functional change intended.

Sorry for the churn. The iterator classes are supposed to help avoid
giant commits like this one in the future. The TableGen-produced
register lists are getting quite large, and it may be necessary to
change the table representation.

This makes it possible to do so without changing all clients (again).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157854 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2012-06-01 23:28:30 +00:00
parent 4a8fefaf83
commit 396618b43a
35 changed files with 199 additions and 221 deletions
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14
lib/CodeGen/RegisterScavenging.cpp
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@@ -37,9 +37,8 @@ using namespace llvm;
void RegScavenger::setUsed(unsigned Reg) {
RegsAvailable.reset(Reg);
for (const uint16_t *SubRegs = TRI->getSubRegisters(Reg);
unsigned SubReg = *SubRegs; ++SubRegs)
RegsAvailable.reset(SubReg);
for (MCSubRegIterator SubRegs(Reg, TRI); SubRegs.isValid(); ++SubRegs)
RegsAvailable.reset(*SubRegs);
}
bool RegScavenger::isAliasUsed(unsigned Reg) const {
@@ -112,8 +111,8 @@ void RegScavenger::enterBasicBlock(MachineBasicBlock *mbb) {
void RegScavenger::addRegWithSubRegs(BitVector &BV, unsigned Reg) {
BV.set(Reg);
for (const uint16_t *R = TRI->getSubRegisters(Reg); *R; R++)
BV.set(*R);
for (MCSubRegIterator SubRegs(Reg, TRI); SubRegs.isValid(); ++SubRegs)
BV.set(*SubRegs);
}
void RegScavenger::forward() {
@@ -193,9 +192,8 @@ void RegScavenger::forward() {
// Ideally we would like a way to model this, but leaving the
// insert_subreg around causes both correctness and performance issues.
bool SubUsed = false;
for (const uint16_t *SubRegs = TRI->getSubRegisters(Reg);
unsigned SubReg = *SubRegs; ++SubRegs)
if (isUsed(SubReg)) {
for (MCSubRegIterator SubRegs(Reg, TRI); SubRegs.isValid(); ++SubRegs)
if (isUsed(*SubRegs)) {
SubUsed = true;
break;
}