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| author | Chris Dewhurst <chris.dewhurst@lero.ie> | 2016-10-10 08:53:06 +0000 |
|---|---|---|
| committer | Chris Dewhurst <chris.dewhurst@lero.ie> | 2016-10-10 08:53:06 +0000 |
| commit | 850131213f1cb52653f7ff092cf48a23e04bab24 (patch) | |
| tree | f4d8657b3f5abf7ae3e103919c20d069e3b09236 /llvm/lib/Target/Sparc/SparcISelDAGToDAG.cpp | |
| parent | 30cd7341d07a94b78864355c64103d41bdbde910 (diff) | |
| download | bcm5719-llvm-850131213f1cb52653f7ff092cf48a23e04bab24.tar.gz bcm5719-llvm-850131213f1cb52653f7ff092cf48a23e04bab24.zip | |
This pass, fixing an erratum in some LEON 2 processors ensures that the SDIV instruction is not issued, but replaced by SDIVcc instead, which does not exhibit the error. Unit test included.
Differential Review: https://reviews.llvm.org/D24660
llvm-svn: 283727
Diffstat (limited to 'llvm/lib/Target/Sparc/SparcISelDAGToDAG.cpp')
| -rw-r--r-- | llvm/lib/Target/Sparc/SparcISelDAGToDAG.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/Target/Sparc/SparcISelDAGToDAG.cpp b/llvm/lib/Target/Sparc/SparcISelDAGToDAG.cpp index a16cd32484a..c36e75d1b07 100644 --- a/llvm/lib/Target/Sparc/SparcISelDAGToDAG.cpp +++ b/llvm/lib/Target/Sparc/SparcISelDAGToDAG.cpp @@ -360,6 +360,12 @@ void SparcDAGToDAGISel::Select(SDNode *N) { // FIXME: Handle div by immediate. unsigned Opcode = N->getOpcode() == ISD::SDIV ? SP::SDIVrr : SP::UDIVrr; + // SDIV is a hardware erratum on some LEON2 processors. Replace it with SDIVcc here. + if (((SparcTargetMachine&)TM).getSubtargetImpl()->performSDIVReplace() + && + Opcode == SP::SDIVrr) { + Opcode = SP::SDIVCCrr; + } CurDAG->SelectNodeTo(N, Opcode, MVT::i32, DivLHS, DivRHS, TopPart); return; } |
