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author | Evan Cheng <evan.cheng@apple.com> | 2008-03-11 21:34:46 +0000 |
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committer | Evan Cheng <evan.cheng@apple.com> | 2008-03-11 21:34:46 +0000 |
commit | c1f53c742620dd4f2460685477303002bba8a8d8 (patch) | |
tree | 2f56ff10470c4e84228abd285d7b6aae291e1f4a /lib/CodeGen/VirtRegMap.h | |
parent | 9736028d84de3a72dd8db5f49cfaa07280154a0e (diff) | |
download | external_llvm-c1f53c742620dd4f2460685477303002bba8a8d8.zip external_llvm-c1f53c742620dd4f2460685477303002bba8a8d8.tar.gz external_llvm-c1f53c742620dd4f2460685477303002bba8a8d8.tar.bz2 |
Transfer physical register spill info when load / store folding happens.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48246 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/VirtRegMap.h')
-rw-r--r-- | lib/CodeGen/VirtRegMap.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/lib/CodeGen/VirtRegMap.h b/lib/CodeGen/VirtRegMap.h index 7ebf31e..63d5b87 100644 --- a/lib/CodeGen/VirtRegMap.h +++ b/lib/CodeGen/VirtRegMap.h @@ -268,6 +268,8 @@ namespace llvm { } } + /// @brief - transfer spill point information from one instruction to + /// another. void transferSpillPts(MachineInstr *Old, MachineInstr *New) { std::map<MachineInstr*,std::vector<std::pair<unsigned,bool> > >::iterator I = SpillPt2VirtMap.find(Old); @@ -343,6 +345,21 @@ namespace llvm { return EmergencySpillMap[MI]; } + /// @brief - transfer emergency spill information from one instruction to + /// another. + void transferEmergencySpills(MachineInstr *Old, MachineInstr *New) { + std::map<MachineInstr*,std::vector<unsigned> >::iterator I = + EmergencySpillMap.find(Old); + if (I == EmergencySpillMap.end()) + return; + while (!I->second.empty()) { + unsigned virtReg = I->second.back(); + I->second.pop_back(); + addEmergencySpill(virtReg, New); + } + EmergencySpillMap.erase(I); + } + /// @brief return or get a emergency spill slot for the register class. int getEmergencySpillSlot(const TargetRegisterClass *RC); |