diff options
| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-12-03 23:23:50 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-12-03 23:23:50 +0000 |
| commit | fc6374439edf2f74da4026f4cea8e341d092be5c (patch) | |
| tree | bb000dd3e82cff7fae77dcf0f9d9930922e4e1f4 /lib/CodeGen/VirtRegMap.cpp | |
| parent | ade047463fd6e0fbb447145eb06015b8e7836482 (diff) | |
Add VirtRegMap::hasKnownPreference().
Virtual registers with a known preferred register are prioritized by
RAGreedy. This function makes the condition explicit without depending
on getRegAllocPref().
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169179 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/VirtRegMap.cpp')
| -rw-r--r-- | lib/CodeGen/VirtRegMap.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/CodeGen/VirtRegMap.cpp b/lib/CodeGen/VirtRegMap.cpp index cf674575ba..dcfad66414 100644 --- a/lib/CodeGen/VirtRegMap.cpp +++ b/lib/CodeGen/VirtRegMap.cpp @@ -88,6 +88,15 @@ unsigned VirtRegMap::getRegAllocPref(unsigned virtReg) { return TRI->ResolveRegAllocHint(Hint.first, physReg, *MF); } +bool VirtRegMap::hasKnownPreference(unsigned VirtReg) { + std::pair<unsigned, unsigned> Hint = MRI->getRegAllocationHint(VirtReg); + if (TargetRegisterInfo::isPhysicalRegister(Hint.second)) + return true; + if (TargetRegisterInfo::isVirtualRegister(Hint.second)) + return hasPhys(Hint.second); + return false; +} + int VirtRegMap::assignVirt2StackSlot(unsigned virtReg) { assert(TargetRegisterInfo::isVirtualRegister(virtReg)); assert(Virt2StackSlotMap[virtReg] == NO_STACK_SLOT && |