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[dev.typeparams] cmd/compile: match register-ABI version of memmove call on ARM64

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Update the rule to match register-ABI version of the call for
inlining memmove.

Change-Id: Ic6da810e4d7ac391ffb766fcdc943985f0739624
Reviewed-on: https://go-review.googlesource.com/c/go/+/323930
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
This commit is contained in:
Cherry Mui 2021-05-28 22:32:41 -04:00
parent 8e7abefdaa
commit e4003463ff
2 changed files with 37 additions and 0 deletions
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9
src/cmd/compile/internal/ssa/gen/ARM64.rules
View file

@ -2868,3 +2868,12 @@
&& isInlinableMemmove(dst, src, sz, config)
&& clobber(s1, s2, s3, call)
=> (Move [sz] dst src mem)
// Match post-lowering calls, register version.
(SelectN [0] call:(CALLstatic {sym} dst src (MOVDconst [sz]) mem))
&& sz >= 0
&& isSameCall(sym, "runtime.memmove")
&& call.Uses == 1
&& isInlinableMemmove(dst, src, sz, config)
&& clobber(call)
=> (Move [sz] dst src mem)

28
src/cmd/compile/internal/ssa/rewriteARM64.go
View file

@ -26031,6 +26031,34 @@ func rewriteValueARM64_OpSelectN(v *Value) bool {
v.AddArg3(dst, src, mem)
return true
}
// match: (SelectN [0] call:(CALLstatic {sym} dst src (MOVDconst [sz]) mem))
// cond: sz >= 0 && isSameCall(sym, "runtime.memmove") && call.Uses == 1 && isInlinableMemmove(dst, src, sz, config) && clobber(call)
// result: (Move [sz] dst src mem)
for {
if auxIntToInt64(v.AuxInt) != 0 {
break
}
call := v_0
if call.Op != OpARM64CALLstatic || len(call.Args) != 4 {
break
}
sym := auxToCall(call.Aux)
mem := call.Args[3]
dst := call.Args[0]
src := call.Args[1]
call_2 := call.Args[2]
if call_2.Op != OpARM64MOVDconst {
break
}
sz := auxIntToInt64(call_2.AuxInt)
if !(sz >= 0 && isSameCall(sym, "runtime.memmove") && call.Uses == 1 && isInlinableMemmove(dst, src, sz, config) && clobber(call)) {
break
}
v.reset(OpMove)
v.AuxInt = int64ToAuxInt(sz)
v.AddArg3(dst, src, mem)
return true
}
return false
}
func rewriteValueARM64_OpSlicemask(v *Value) bool {