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| author | Keith Randall <khr@golang.org> | 2015-06-12 16:24:33 -0700 |
|---|---|---|
| committer | Keith Randall <khr@golang.org> | 2015-06-14 03:56:47 +0000 |
| commit | 0ad9c8c720324b6c4e483ac7fe0e20f36274e2eb (patch) | |
| tree | 5e6f7658db3704cd624afc422a457e05219e893e /src/cmd | |
| parent | d5ad9ced1c82d4a1cb63d92f33552a064d7e8162 (diff) | |
| download | go-0ad9c8c720324b6c4e483ac7fe0e20f36274e2eb.tar.xz | |
[dev.ssa] cmd/compile/internal/gc: Small fixes
Allow labels to be unreachable via fallthrough from above.
Implement OCONVNOP.
Change-Id: I6869993cad8a27ad134dd637de89a40117daf47b
Reviewed-on: https://go-review.googlesource.com/11001
Reviewed-by: Daniel Morsing <daniel.morsing@gmail.com>
Diffstat (limited to 'src/cmd')
| -rw-r--r-- | src/cmd/compile/internal/gc/ssa.go | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/cmd/compile/internal/gc/ssa.go b/src/cmd/compile/internal/gc/ssa.go index 131e97ff48..ebb7f44a18 100644 --- a/src/cmd/compile/internal/gc/ssa.go +++ b/src/cmd/compile/internal/gc/ssa.go @@ -217,8 +217,9 @@ func (s *state) stmt(n *Node) { s.labels[n.Left.Sym.Name] = t } // go to that label (we pretend "label:" is preceded by "goto label") - b := s.endBlock() - addEdge(b, t) + if b := s.endBlock(); b != nil { + addEdge(b, t) + } if n.Op == OLABEL { // next we work on the label's target block @@ -358,6 +359,9 @@ func (s *state) expr(n *Node) *ssa.Value { log.Fatalf("unhandled OLITERAL %v", n.Val().Ctype()) return nil } + case OCONVNOP: + x := s.expr(n.Left) + return s.newValue1(ssa.OpConvNop, n.Type, nil, x) // binary ops case OLT: |