diff options
Diffstat (limited to 'lib/CodeGen/RegisterScavenging.cpp')
| -rw-r--r-- | lib/CodeGen/RegisterScavenging.cpp | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/lib/CodeGen/RegisterScavenging.cpp b/lib/CodeGen/RegisterScavenging.cpp index 3eefedadf2..8a1ef5adf7 100644 --- a/lib/CodeGen/RegisterScavenging.cpp +++ b/lib/CodeGen/RegisterScavenging.cpp @@ -242,8 +242,18 @@ unsigned RegScavenger::FindUnusedReg(const TargetRegisterClass *RC) const { return 0; } +/// getRegsAvailable - Return all available registers in the register class +/// in Mask. +void RegScavenger::getRegsAvailable(const TargetRegisterClass *RC, + BitVector &Mask) { + for (TargetRegisterClass::iterator I = RC->begin(), E = RC->end(); + I != E; ++I) + if (!isAliasUsed(*I)) + Mask.set(*I); +} + /// findSurvivorReg - Return the candidate register that is unused for the -/// longest after MBBI. UseMI is set to the instruction where the search +/// longest after StargMII. UseMI is set to the instruction where the search /// stopped. /// /// No more than InstrLimit instructions are inspected. |