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[Hexagon] Update the callee-saved register set for EH-aware functions 

llvm-svn: 261208
This commit is contained in:
Krzysztof Parzyszek 2016-02-18 13:41:05 +00:00
parent e593094a15
commit 39686cf98e
1 changed files with 15 additions and 3 deletions
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18
llvm/lib/Target/Hexagon/HexagonRegisterInfo.cpp
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@ -62,8 +62,7 @@ HexagonRegisterInfo::getCallerSavedRegs(const MachineFunction *MF) const {
Hexagon::R15, 0
};
auto &HST = static_cast<const HexagonSubtarget&>(MF->getSubtarget());
switch (HST.getHexagonArchVersion()) {
switch (MF->getSubtarget<HexagonSubtarget>().getHexagonArchVersion()) {
case HexagonSubtarget::V4:
case HexagonSubtarget::V5:
case HexagonSubtarget::V55:
@ -83,17 +82,30 @@ HexagonRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
Hexagon::R24, Hexagon::R25, Hexagon::R26, Hexagon::R27, 0
};
// Functions that contain a call to __builtin_eh_return also save the first 4
// parameter registers.
static const MCPhysReg CalleeSavedRegsV3EHReturn[] = {
Hexagon::R0, Hexagon::R1, Hexagon::R2, Hexagon::R3,
Hexagon::R16, Hexagon::R17, Hexagon::R18, Hexagon::R19,
Hexagon::R20, Hexagon::R21, Hexagon::R22, Hexagon::R23,
Hexagon::R24, Hexagon::R25, Hexagon::R26, Hexagon::R27, 0
};
bool HasEHReturn = MF->getInfo<HexagonMachineFunctionInfo>()->hasEHReturn();
switch (MF->getSubtarget<HexagonSubtarget>().getHexagonArchVersion()) {
case HexagonSubtarget::V4:
case HexagonSubtarget::V5:
case HexagonSubtarget::V55:
case HexagonSubtarget::V60:
return CalleeSavedRegsV3;
return HasEHReturn ? CalleeSavedRegsV3EHReturn : CalleeSavedRegsV3;
}
llvm_unreachable("Callee saved registers requested for unknown architecture "
"version");
}
BitVector HexagonRegisterInfo::getReservedRegs(const MachineFunction &MF)
const {
BitVector Reserved(getNumRegs());