diff options
| author | Keith Randall <khr@golang.org> | 2016-01-05 14:56:26 -0800 |
|---|---|---|
| committer | Keith Randall <khr@golang.org> | 2016-01-13 18:42:00 +0000 |
| commit | 3425295e915bc16236f2c021317705aca34319af (patch) | |
| tree | 3d9adc97103ae2c92c95f777ca1339d0797a6bdd /src/cmd/compile/internal/ssa/lower.go | |
| parent | 9094e3ada2de3cc8129b70730c2c0782a4040201 (diff) | |
| download | go-3425295e915bc16236f2c021317705aca34319af.tar.gz go-3425295e915bc16236f2c021317705aca34319af.zip | |
[dev.ssa] cmd/compile: clean up comparisons
Add new constant-flags opcodes. These can be generated from
comparisons that we know the result of, like x&31 < 32.
Constant-fold the constant-flags opcodes into all flag users.
Reorder some CMPxconst args so they read in the comparison direction.
Reorg deadcode removal a bit - it needs to remove the OpCopy ops it
generates when strength-reducing Phi ops. So it needs to splice out all
the dead blocks and do a copy elimination before it computes live
values.
Change-Id: Ie922602033592ad8212efe4345394973d3b94d9f
Reviewed-on: https://go-review.googlesource.com/18267
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Diffstat (limited to 'src/cmd/compile/internal/ssa/lower.go')
| -rw-r--r-- | src/cmd/compile/internal/ssa/lower.go | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/cmd/compile/internal/ssa/lower.go b/src/cmd/compile/internal/ssa/lower.go index bf3c15f78b..1b50eb642b 100644 --- a/src/cmd/compile/internal/ssa/lower.go +++ b/src/cmd/compile/internal/ssa/lower.go @@ -21,7 +21,7 @@ func checkLower(f *Func) { continue // lowered } switch v.Op { - case OpSP, OpSB, OpInitMem, OpArg, OpCopy, OpPhi, OpVarDef, OpVarKill: + case OpSP, OpSB, OpInitMem, OpArg, OpPhi, OpVarDef, OpVarKill: continue // ok not to lower } s := "not lowered: " + v.Op.String() + " " + v.Type.SimpleString() |