diff options
| author | Dimitry Andric <dim@FreeBSD.org> | 2017-06-16 21:03:24 +0000 |
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2017-06-16 21:03:24 +0000 |
| commit | 7c7aba6e5fef47a01a136be655b0a92cfd7090f6 (patch) | |
| tree | 99ec531924f6078534b100ab9d7696abce848099 /lib/Target/PowerPC/PPCRegisterInfo.cpp | |
| parent | 7ab83427af0f77b59941ceba41d509d7d097b065 (diff) | |
Vendor import of llvm trunk r305575:vendor/llvm/llvm-trunk-r305575
Notes
svn path=/vendor/llvm/dist/; revision=320013
svn path=/vendor/llvm/llvm-trunk-r305575/; revision=320014; tag=vendor/llvm/llvm-trunk-r305575
Diffstat (limited to 'lib/Target/PowerPC/PPCRegisterInfo.cpp')
| -rw-r--r-- | lib/Target/PowerPC/PPCRegisterInfo.cpp | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/PPCRegisterInfo.cpp b/lib/Target/PowerPC/PPCRegisterInfo.cpp index aad913924692..637e52bbdbee 100644 --- a/lib/Target/PowerPC/PPCRegisterInfo.cpp +++ b/lib/Target/PowerPC/PPCRegisterInfo.cpp @@ -273,6 +273,20 @@ BitVector PPCRegisterInfo::getReservedRegs(const MachineFunction &MF) const { return Reserved; } +bool PPCRegisterInfo::isCallerPreservedPhysReg(unsigned PhysReg, + const MachineFunction &MF) const { + assert(TargetRegisterInfo::isPhysicalRegister(PhysReg)); + if (TM.isELFv2ABI() && PhysReg == PPC::X2) { + // X2 is guaranteed to be preserved within a function if it is reserved. + // The reason it's reserved is that it's the TOC pointer (and the function + // uses the TOC). In functions where it isn't reserved (i.e. leaf functions + // with no TOC access), we can't claim that it is preserved. + return (getReservedRegs(MF).test(PPC::X2)); + } else { + return false; + } +} + unsigned PPCRegisterInfo::getRegPressureLimit(const TargetRegisterClass *RC, MachineFunction &MF) const { const PPCFrameLowering *TFI = getFrameLowering(MF); |