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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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| .. | ||
| alu8.ll | ||
| atomics.ll | ||
| basictest.ll | ||
| byval.ll | ||
| cc_args_be.ll | ||
| cc_args.ll | ||
| cc_ret.ll | ||
| cmp.ll | ||
| ex1.ll | ||
| fi_ri.ll | ||
| intrinsics.ll | ||
| lit.local.cfg | ||
| load.ll | ||
| loops.ll | ||
| many_args1.ll | ||
| many_args2.ll | ||
| sanity.ll | ||
| setcc.ll | ||
| shifts.ll | ||
| sockex2.ll | ||
| struct_ret1.ll | ||
| struct_ret2.ll | ||
| undef.ll | ||
| vararg1.ll | ||