[dev.ssa] cmd/compile: remove dead amd64 ITab lowering rule

ITab is handled by decomposition.
The rule is vestigial. Remove it.

Change-Id: I6fdf3d14d466761c7665c7ea14f34ca0e1e3e646
Reviewed-on: https://go-review.googlesource.com/24718
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>

diff --git a/src/cmd/compile/internal/ssa/gen/AMD64.rules b/src/cmd/compile/internal/ssa/gen/AMD64.rules
index c38d61c9e2f45e82c8399b033eef4dffde486bb5..29abfbbc5e072a06be1e0072307b303b45307d20 100644 (file)
--- a/src/cmd/compile/internal/ssa/gen/AMD64.rules
+++ b/src/cmd/compile/internal/ssa/gen/AMD64.rules
@@ -436,7 +436,6 @@
 (GetG mem) -> (LoweredGetG mem)
 (GetClosurePtr) -> (LoweredGetClosurePtr)
 (Addr {sym} base) -> (LEAQ {sym} base)
-(ITab (Load ptr mem)) -> (MOVQload ptr mem)
 
 // block rewrites
 (If (SETL  cmp) yes no) -> (LT  cmp yes no)

diff --git a/src/cmd/compile/internal/ssa/rewriteAMD64.go b/src/cmd/compile/internal/ssa/rewriteAMD64.go
index 8085f323fcd46ae1eada6a02d26563f409a56b28..4a21f4574d29ab6ea87502110cc0e5e982e15c50 100644 (file)
--- a/src/cmd/compile/internal/ssa/rewriteAMD64.go
+++ b/src/cmd/compile/internal/ssa/rewriteAMD64.go
@@ -232,8 +232,6 @@ func rewriteValueAMD64(v *Value, config *Config) bool {
                return rewriteValueAMD64_OpHmul8(v, config)
        case OpHmul8u:
                return rewriteValueAMD64_OpHmul8u(v, config)
-       case OpITab:
-               return rewriteValueAMD64_OpITab(v, config)
        case OpInterCall:
                return rewriteValueAMD64_OpInterCall(v, config)
        case OpIsInBounds:
@@ -4057,26 +4055,6 @@ func rewriteValueAMD64_OpHmul8u(v *Value, config *Config) bool {
                return true
        }
 }
-func rewriteValueAMD64_OpITab(v *Value, config *Config) bool {
-       b := v.Block
-       _ = b
-       // match: (ITab (Load ptr mem))
-       // cond:
-       // result: (MOVQload ptr mem)
-       for {
-               v_0 := v.Args[0]
-               if v_0.Op != OpLoad {
-                       break
-               }
-               ptr := v_0.Args[0]
-               mem := v_0.Args[1]
-               v.reset(OpAMD64MOVQload)
-               v.AddArg(ptr)
-               v.AddArg(mem)
-               return true
-       }
-       return false
-}
 func rewriteValueAMD64_OpInterCall(v *Value, config *Config) bool {
        b := v.Block
        _ = b