}
void SparcFrameLowering::remapRegsForLeafProc(MachineFunction &MF) const {
-
MachineRegisterInfo &MRI = MF.getRegInfo();
-
// Remap %i[0-7] to %o[0-7].
for (unsigned reg = SP::I0; reg <= SP::I7; ++reg) {
if (MRI.reg_nodbg_empty(reg))
continue;
- unsigned mapped_reg = (reg - SP::I0 + SP::O0);
+
+ unsigned mapped_reg = reg - SP::I0 + SP::O0;
assert(MRI.reg_nodbg_empty(mapped_reg));
// Replace I register with O register.
MRI.replaceRegWith(reg, mapped_reg);
+
+ // Also replace register pair super-registers.
+ if ((reg - SP::I0) % 2 == 0) {
+ unsigned preg = (reg - SP::I0) / 2 + SP::I0_I1;
+ unsigned mapped_preg = preg - SP::I0_I1 + SP::O0_O1;
+ MRI.replaceRegWith(preg, mapped_preg);
+ }
}
// Rewrite MBB's Live-ins.
for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
MBB != E; ++MBB) {
+ for (unsigned reg = SP::I0_I1; reg <= SP::I6_I7; ++reg) {
+ if (!MBB->isLiveIn(reg))
+ continue;
+ MBB->removeLiveIn(reg);
+ MBB->addLiveIn(reg - SP::I0_I1 + SP::O0_O1);
+ }
for (unsigned reg = SP::I0; reg <= SP::I7; ++reg) {
if (!MBB->isLiveIn(reg))
continue;