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author | Evan Cheng <evan.cheng@apple.com> | 2007-04-02 18:49:18 +0000 |
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committer | Evan Cheng <evan.cheng@apple.com> | 2007-04-02 18:49:18 +0000 |
commit | bcfd4665b5597ed1ba679584a69080396d68bcf9 (patch) | |
tree | 0b16e89489a29015f5ef26d61c831ca044f45087 | |
parent | ff6ad39bfbb662ebd04b229c5b25e228d4507f52 (diff) | |
download | external_llvm-bcfd4665b5597ed1ba679584a69080396d68bcf9.zip external_llvm-bcfd4665b5597ed1ba679584a69080396d68bcf9.tar.gz external_llvm-bcfd4665b5597ed1ba679584a69080396d68bcf9.tar.bz2 |
Ugh. Copy coalescer does not update register numbers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35600 91177308-0d34-0410-b5e6-96231b3b80d8
-rw-r--r-- | include/llvm/CodeGen/LiveIntervalAnalysis.h | 4 | ||||
-rw-r--r-- | lib/CodeGen/LiveIntervalAnalysis.cpp | 17 |
2 files changed, 19 insertions, 2 deletions
diff --git a/include/llvm/CodeGen/LiveIntervalAnalysis.h b/include/llvm/CodeGen/LiveIntervalAnalysis.h index ebd63c8..641ff6a 100644 --- a/include/llvm/CodeGen/LiveIntervalAnalysis.h +++ b/include/llvm/CodeGen/LiveIntervalAnalysis.h @@ -267,6 +267,10 @@ namespace llvm { MachineInstr *lastRegisterUse(unsigned Reg, unsigned Start, unsigned End, MachineOperand *&MOU); + /// findDefOperand - Returns the MachineOperand that is a def of the specific + /// register. It returns NULL if the def is not found. + MachineOperand *findDefOperand(MachineInstr *MI, unsigned Reg); + /// unsetRegisterKill - Unset IsKill property of all uses of the specific /// register of the specific instruction. void unsetRegisterKill(MachineInstr *MI, unsigned Reg); diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp index bc4f601..a01889a 100644 --- a/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -945,7 +945,7 @@ bool LiveIntervals::JoinCopy(MachineInstr *CopyMI, } else { MachineInstr *SrcMI = getInstructionFromIndex(SrcStart); if (SrcMI) { - MachineOperand *mops = SrcMI->findRegisterDefOperand(SrcReg); + MachineOperand *mops = findDefOperand(SrcMI, repSrcReg); if (mops) // A dead def should have a single cycle interval. ++RemoveStart; @@ -1022,7 +1022,7 @@ TryJoin: } else { MachineInstr *SrcMI = getInstructionFromIndex(SrcStart); if (SrcMI) { - MachineOperand *mops = SrcMI->findRegisterDefOperand(SrcReg); + MachineOperand *mops = findDefOperand(SrcMI, repSrcReg); if (mops) mops->setIsDead(); } @@ -1617,6 +1617,19 @@ LiveIntervals::lastRegisterUse(unsigned Reg, unsigned Start, unsigned End, return NULL; } + +/// findDefOperand - Returns the MachineOperand that is a def of the specific +/// register. It returns NULL if the def is not found. +MachineOperand *LiveIntervals::findDefOperand(MachineInstr *MI, unsigned Reg) { + for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) { + MachineOperand &MO = MI->getOperand(i); + if (MO.isReg() && MO.isDef() && + mri_->regsOverlap(rep(MO.getReg()), Reg)) + return &MO; + } + return NULL; +} + /// unsetRegisterKill - Unset IsKill property of all uses of specific register /// of the specific instruction. void LiveIntervals::unsetRegisterKill(MachineInstr *MI, unsigned Reg) { |