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author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-06-24 20:18:15 +0000 |
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committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-06-24 20:18:15 +0000 |
commit | 3c7b3fecacee40df7b9a99d290638398b5a62173 (patch) | |
tree | 0188b436800ceff1d8226b68b69c598c61fa660a /lib/CodeGen | |
parent | c0490ac91502c3f9e791124c6f3a8ad17aab6a72 (diff) | |
download | external_llvm-3c7b3fecacee40df7b9a99d290638398b5a62173.zip external_llvm-3c7b3fecacee40df7b9a99d290638398b5a62173.tar.gz external_llvm-3c7b3fecacee40df7b9a99d290638398b5a62173.tar.bz2 |
Remove the now unused LiveIntervals::getVNInfoSourceReg().
This method was always a bit too simplistic for the real world. It didn't really
deal with subregisters and such.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106781 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen')
-rw-r--r-- | lib/CodeGen/LiveIntervalAnalysis.cpp | 31 |
1 files changed, 0 insertions, 31 deletions
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp index 949a0cf..7ae66ae 100644 --- a/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -783,37 +783,6 @@ LiveInterval* LiveIntervals::dupInterval(LiveInterval *li) { return NewLI; } -/// getVNInfoSourceReg - Helper function that parses the specified VNInfo -/// copy field and returns the source register that defines it. -unsigned LiveIntervals::getVNInfoSourceReg(const VNInfo *VNI) const { - if (!VNI->getCopy()) - return 0; - - if (VNI->getCopy()->isExtractSubreg()) { - // If it's extracting out of a physical register, return the sub-register. - unsigned Reg = VNI->getCopy()->getOperand(1).getReg(); - if (TargetRegisterInfo::isPhysicalRegister(Reg)) { - unsigned SrcSubReg = VNI->getCopy()->getOperand(2).getImm(); - unsigned DstSubReg = VNI->getCopy()->getOperand(0).getSubReg(); - if (SrcSubReg == DstSubReg) - // %reg1034:3<def> = EXTRACT_SUBREG %EDX, 3 - // reg1034 can still be coalesced to EDX. - return Reg; - assert(DstSubReg == 0); - Reg = tri_->getSubReg(Reg, VNI->getCopy()->getOperand(2).getImm()); - } - return Reg; - } else if (VNI->getCopy()->isInsertSubreg() || - VNI->getCopy()->isSubregToReg()) - return VNI->getCopy()->getOperand(2).getReg(); - - unsigned SrcReg, DstReg, SrcSubReg, DstSubReg; - if (tii_->isMoveInstr(*VNI->getCopy(), SrcReg, DstReg, SrcSubReg, DstSubReg)) - return SrcReg; - llvm_unreachable("Unrecognized copy instruction!"); - return 0; -} - //===----------------------------------------------------------------------===// // Register allocator hooks. // |