cmd/compile: store the comparison pseudo-ops of arm64 conditional instructions in AuxInt

The current implementation stores the comparison pseudo-ops of arm64
conditional instructions (CSEL/CSEL0) in Aux, this patch modifies it
and stores it in AuxInt, which can avoid the allocation.

Change-Id: I0b69e51f63acd84c6878c6a59ccf6417501a8cfc
Reviewed-on: https://go-review.googlesource.com/c/go/+/252517
Run-TryBot: fannie zhang <Fannie.Zhang@arm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>

1 files changed, 8 insertions, 7 deletions

diff --git a/src/cmd/compile/internal/ssa/rewrite.go b/src/cmd/compile/internal/ssa/rewrite.go
index 3df9ad24f9..09f94ef53e 100644
--- a/src/cmd/compile/internal/ssa/rewrite.go
+++ b/src/cmd/compile/internal/ssa/rewrite.go
@@ -651,6 +651,10 @@ func auxIntToFlagConstant(x int64) flagConstant {
 	return flagConstant(x)
 }
 
+func auxIntToOp(cc int64) Op {
+	return Op(cc)
+}
+
 func boolToAuxInt(b bool) int64 {
 	if b {
 		return 1
@@ -694,6 +698,10 @@ func flagConstantToAuxInt(x flagConstant) int64 {
 	return int64(x)
 }
 
+func opToAuxInt(o Op) int64 {
+	return int64(o)
+}
+
 func auxToString(i interface{}) string {
 	return i.(string)
 }
@@ -727,13 +735,6 @@ func s390xCCMaskToAux(c s390x.CCMask) interface{} {
 func s390xRotateParamsToAux(r s390x.RotateParams) interface{} {
 	return r
 }
-func cCopToAux(o Op) interface{} {
-	return o
-}
-
-func auxToCCop(cc interface{}) Op {
-	return cc.(Op)
-}
 
 // uaddOvf reports whether unsigned a+b would overflow.
 func uaddOvf(a, b int64) bool {