diff options
Diffstat (limited to 'src/cmd')
| -rw-r--r-- | src/cmd/compile/internal/ssa/cse.go | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/src/cmd/compile/internal/ssa/cse.go b/src/cmd/compile/internal/ssa/cse.go index d852e22d5c..d931d6bf5f 100644 --- a/src/cmd/compile/internal/ssa/cse.go +++ b/src/cmd/compile/internal/ssa/cse.go @@ -322,9 +322,13 @@ func cmpVal(v, w *Value, auxIDs auxmap) types.Cmp { // that generate memory. return lt2Cmp(v.ID < w.ID) } - - if tc := v.Type.Compare(w.Type); tc != types.CMPeq { - return tc + // OpSelect is a pseudo-op. We need to be more agressive + // regarding CSE to keep multiple OpSelect's of the same + // argument from existing. + if v.Op != OpSelect0 && v.Op != OpSelect1 { + if tc := v.Type.Compare(w.Type); tc != types.CMPeq { + return tc + } } if v.Aux != w.Aux { |