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cmd/compile: remove broken rules

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These rules don't even type check.  ADDQconstmodify returns memory,
and it is being rewritten to a value that returns an int64.

There should be a MOVQstore wrapped around the result.
These rules never fire during all.bash, so they aren't even tested.

I'm just going to remove them for now.

Change-Id: I76008eb51ae4e16c707fac73c05a8d67cac149ae
Reviewed-on: https://go-review.googlesource.com/121935
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Keith Randall 2018-07-02 09:43:37 -07:00 • committed by Keith Randall
parent adfa8b8691
commit 398a8ed653
2 changed files with 0 additions and 73 deletions
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5
src/cmd/compile/internal/ssa/gen/AMD64.rules
View file

@ -2376,11 +2376,6 @@
(XORQload x [off] {sym} ptr (MOVSDstore [off] {sym} ptr y _)) -> (XORQ x (MOVQf2i y))
(XORLload x [off] {sym} ptr (MOVSSstore [off] {sym} ptr y _)) -> (XORL x (MOVLf2i y))
(ADDQconstmodify [valOff] {sym} ptr (MOVSDstore [ValAndOff(valOff).Off()] {sym} ptr x _)) ->
(ADDQconst [ValAndOff(valOff).Val()] (MOVQf2i x))
(ADDLconstmodify [valOff] {sym} ptr (MOVSSstore [ValAndOff(valOff).Off()] {sym} ptr x _)) ->
(ADDLconst [ValAndOff(valOff).Val()] (MOVLf2i x))
(ADDSDload x [off] {sym} ptr (MOVQstore [off] {sym} ptr y _)) -> (ADDSD x (MOVQi2f y))
(ADDSSload x [off] {sym} ptr (MOVLstore [off] {sym} ptr y _)) -> (ADDSS x (MOVLi2f y))
(SUBSDload x [off] {sym} ptr (MOVQstore [off] {sym} ptr y _)) -> (SUBSD x (MOVQi2f y))

68
src/cmd/compile/internal/ssa/rewriteAMD64.go
View file

@ -1874,10 +1874,6 @@ func rewriteValueAMD64_OpAMD64ADDLconst_10(v *Value) bool {
return false
}
func rewriteValueAMD64_OpAMD64ADDLconstmodify_0(v *Value) bool {
b := v.Block
_ = b
typ := &b.Func.Config.Types
_ = typ
// match: (ADDLconstmodify [valoff1] {sym} (ADDQconst [off2] base) mem)
// cond: ValAndOff(valoff1).canAdd(off2)
// result: (ADDLconstmodify [ValAndOff(valoff1).add(off2)] {sym} base mem)
@ -1927,36 +1923,6 @@ func rewriteValueAMD64_OpAMD64ADDLconstmodify_0(v *Value) bool {
v.AddArg(mem)
return true
}
// match: (ADDLconstmodify [valOff] {sym} ptr (MOVSSstore [ValAndOff(valOff).Off()] {sym} ptr x _))
// cond:
// result: (ADDLconst [ValAndOff(valOff).Val()] (MOVLf2i x))
for {
valOff := v.AuxInt
sym := v.Aux
_ = v.Args[1]
ptr := v.Args[0]
v_1 := v.Args[1]
if v_1.Op != OpAMD64MOVSSstore {
break
}
if v_1.AuxInt != ValAndOff(valOff).Off() {
break
}
if v_1.Aux != sym {
break
}
_ = v_1.Args[2]
if ptr != v_1.Args[0] {
break
}
x := v_1.Args[1]
v.reset(OpAMD64ADDLconst)
v.AuxInt = ValAndOff(valOff).Val()
v0 := b.NewValue0(v.Pos, OpAMD64MOVLf2i, typ.UInt32)
v0.AddArg(x)
v.AddArg(v0)
return true
}
return false
}
func rewriteValueAMD64_OpAMD64ADDLload_0(v *Value) bool {
@ -2772,10 +2738,6 @@ func rewriteValueAMD64_OpAMD64ADDQconst_10(v *Value) bool {
return false
}
func rewriteValueAMD64_OpAMD64ADDQconstmodify_0(v *Value) bool {
b := v.Block
_ = b
typ := &b.Func.Config.Types
_ = typ
// match: (ADDQconstmodify [valoff1] {sym} (ADDQconst [off2] base) mem)
// cond: ValAndOff(valoff1).canAdd(off2)
// result: (ADDQconstmodify [ValAndOff(valoff1).add(off2)] {sym} base mem)
@ -2825,36 +2787,6 @@ func rewriteValueAMD64_OpAMD64ADDQconstmodify_0(v *Value) bool {
v.AddArg(mem)
return true
}
// match: (ADDQconstmodify [valOff] {sym} ptr (MOVSDstore [ValAndOff(valOff).Off()] {sym} ptr x _))
// cond:
// result: (ADDQconst [ValAndOff(valOff).Val()] (MOVQf2i x))
for {
valOff := v.AuxInt
sym := v.Aux
_ = v.Args[1]
ptr := v.Args[0]
v_1 := v.Args[1]
if v_1.Op != OpAMD64MOVSDstore {
break
}
if v_1.AuxInt != ValAndOff(valOff).Off() {
break
}
if v_1.Aux != sym {
break
}
_ = v_1.Args[2]
if ptr != v_1.Args[0] {
break
}
x := v_1.Args[1]
v.reset(OpAMD64ADDQconst)
v.AuxInt = ValAndOff(valOff).Val()
v0 := b.NewValue0(v.Pos, OpAMD64MOVQf2i, typ.UInt64)
v0.AddArg(x)
v.AddArg(v0)
return true
}
return false
}
func rewriteValueAMD64_OpAMD64ADDQload_0(v *Value) bool {