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def314d5bf
o Before this patch, BPF backend will expand UNDEF node
to i64 constant 0.
o For second pass of dag combiner, legalizer will run through
each to-be-processed dag node.
o If any new SDNode is generated and has an undef operand,
dag combiner will put undef node, newly-generated constant-0 node,
and any node which uses these nodes in the working list.
o During this process, it is possible undef operand is
generated again, and this will form an infinite loop
for dag combiner pass2.
o This patch allows UNDEF to be a legal type.
Signed-off-by: Yonghong Song <yhs@plumgrid.com>
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
llvm-svn: 249718
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| .. | ||
| InstPrinter | ||
| MCTargetDesc | ||
| TargetInfo | ||
| BPF.h | ||
| BPF.td | ||
| BPFAsmPrinter.cpp | ||
| BPFCallingConv.td | ||
| BPFFrameLowering.cpp | ||
| BPFFrameLowering.h | ||
| BPFInstrFormats.td | ||
| BPFInstrInfo.cpp | ||
| BPFInstrInfo.h | ||
| BPFInstrInfo.td | ||
| BPFISelDAGToDAG.cpp | ||
| BPFISelLowering.cpp | ||
| BPFISelLowering.h | ||
| BPFMCInstLower.cpp | ||
| BPFMCInstLower.h | ||
| BPFRegisterInfo.cpp | ||
| BPFRegisterInfo.h | ||
| BPFRegisterInfo.td | ||
| BPFSubtarget.cpp | ||
| BPFSubtarget.h | ||
| BPFTargetMachine.cpp | ||
| BPFTargetMachine.h | ||
| CMakeLists.txt | ||
| LLVMBuild.txt | ||
| Makefile | ||