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 /include/llvm/Target/TargetRegisterInfo.h | |
| 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 'include/llvm/Target/TargetRegisterInfo.h')
| -rw-r--r-- | include/llvm/Target/TargetRegisterInfo.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/llvm/Target/TargetRegisterInfo.h b/include/llvm/Target/TargetRegisterInfo.h index 4ce6d2ff5e26..86ad8ad53052 100644 --- a/include/llvm/Target/TargetRegisterInfo.h +++ b/include/llvm/Target/TargetRegisterInfo.h @@ -497,6 +497,16 @@ public: /// function. Used by MachineRegisterInfo::isConstantPhysReg(). virtual bool isConstantPhysReg(unsigned PhysReg) const { return false; } + /// Physical registers that may be modified within a function but are + /// guaranteed to be restored before any uses. This is useful for targets that + /// have call sequences where a GOT register may be updated by the caller + /// prior to a call and is guaranteed to be restored (also by the caller) + /// after the call. + virtual bool isCallerPreservedPhysReg(unsigned PhysReg, + const MachineFunction &MF) const { + return false; + } + /// Prior to adding the live-out mask to a stackmap or patchpoint /// instruction, provide the target the opportunity to adjust it (mainly to /// remove pseudo-registers that should be ignored). |