https://bugs.llvm.org/show_bug.cgi?id=51591
Bug ID: 51591
Summary: Failure to vectorize none-of 4xbyte
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: lebedev...@gmail.com
CC: llvm-bugs@lists.llvm.org
https://godbolt.org/z/4WcY9aW5r
https://alive2.llvm.org/ce/z/RgJ439
We need to either/or do a better job of canonicalizing this in instcombine,
or teach SLPVectorizer about this.
SLP: Analyzing blocks in _Z3fooPKh.
SLP: bundle: %cmp.i.i.i.i.i.i = icmp eq i8 %2, -1
SLP: initialize schedule region to %cmp.i.i.i.i.i.i = icmp eq i8 %2, -1
SLP: extend schedule region end to %cmp.i.i59.i.i.i.i = icmp eq i64 %3,
65280
SLP: extend schedule region end to %cmp.i.i60.i.i.i.i = icmp eq i64 %4,
16711680
SLP: extend schedule region end to %cmp.i.i61.i.i.i.i = icmp eq i64 %5,
4278190080
SLP: try schedule bundle [ %cmp.i.i.i.i.i.i = icmp eq i8 %2, -1;
%cmp.i.i59.i.i.i.i = icmp eq i64 %3, 65280; %cmp.i.i60.i.i.i.i = icmp eq i64
%4, 16711680; %cmp.i.i61.i.i.i.i = icmp eq i64 %5, 4278190080] in block entry
SLP: update deps of [ %cmp.i.i.i.i.i.i = icmp eq i8 %2, -1;
%cmp.i.i59.i.i.i.i = icmp eq i64 %3, 65280; %cmp.i.i60.i.i.i.i = icmp eq i64
%4, 16711680; %cmp.i.i61.i.i.i.i = icmp eq i64 %5, 4278190080]
SLP: update deps of / %cmp.i.i59.i.i.i.i = icmp eq i64 %3, 65280
SLP: update deps of / %cmp.i.i60.i.i.i.i = icmp eq i64 %4, 16711680
SLP: update deps of / %cmp.i.i61.i.i.i.i = icmp eq i64 %5, 4278190080
SLP: update deps of %or.cond27 = select i1 %or.cond, i1 true, i1
%cmp.i.i60.i.i.i.i
SLP: gets ready on update: %or.cond27 = select i1 %or.cond, i1 true, i1
%cmp.i.i60.i.i.i.i
SLP: update deps of %or.cond = or i1 %cmp.i.i.i.i.i.i,
%cmp.i.i59.i.i.i.i
SLP: schedule %or.cond27 = select i1 %or.cond, i1 true, i1
%cmp.i.i60.i.i.i.i
SLP: gets ready (def): %or.cond = or i1 %cmp.i.i.i.i.i.i,
%cmp.i.i59.i.i.i.i
SLP: schedule %or.cond = or i1 %cmp.i.i.i.i.i.i, %cmp.i.i59.i.i.i.i
SLP: gets ready (def): [ %cmp.i.i.i.i.i.i = icmp eq i8 %2, -1;
%cmp.i.i59.i.i.i.i = icmp eq i64 %3, 65280; %cmp.i.i60.i.i.i.i = icmp eq i64
%4, 16711680; %cmp.i.i61.i.i.i.i = icmp eq i64 %5, 4278190080]
SLP: We are able to schedule this bundle.
SLP: cancel scheduling of [ %cmp.i.i.i.i.i.i = icmp eq i8 %2, -1;
%cmp.i.i59.i.i.i.i = icmp eq i64 %3, 65280; %cmp.i.i60.i.i.i.i = icmp eq i64
%4, 16711680; %cmp.i.i61.i.i.i.i = icmp eq i64 %5, 4278190080]
SLP: Gathering cmp with different predicate.
SLP: Check whether the tree with height 1 is fully vectorizable .
SLP: Trying to vectorize a list of length = 2.
SLP: Analyzing 2 operations
SLP: bundle: %cmp.i.i.i.i.i.i = icmp eq i8 %2, -1
SLP: initialize schedule region to %cmp.i.i.i.i.i.i = icmp eq i8 %2, -1
SLP: extend schedule region end to %cmp.i.i59.i.i.i.i = icmp eq i64 %3,
65280
SLP: try schedule bundle [ %cmp.i.i.i.i.i.i = icmp eq i8 %2, -1;
%cmp.i.i59.i.i.i.i = icmp eq i64 %3, 65280] in block entry
SLP: update deps of [ %cmp.i.i.i.i.i.i = icmp eq i8 %2, -1;
%cmp.i.i59.i.i.i.i = icmp eq i64 %3, 65280]
SLP: update deps of / %cmp.i.i59.i.i.i.i = icmp eq i64 %3, 65280
SLP: gets ready on update: %cmp.i.i.i.i.i.i = icmp eq i8 %2, -1
SLP: We are able to schedule this bundle.
SLP: cancel scheduling of [ %cmp.i.i.i.i.i.i = icmp eq i8 %2, -1;
%cmp.i.i59.i.i.i.i = icmp eq i64 %3, 65280]
SLP: Gathering cmp with different predicate.
SLP: Check whether the tree with height 1 is fully vectorizable .
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