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cmd/compile: rewrite some AMD64 rules to use typed aux fields

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Surprisingly many rules needed no modification.

Use wrapper functions for aux like we did for auxint.
Simplifies things a bit.

Change-Id: I2e852e77f1585dcb306a976ab9335f1ac5b4a770
Reviewed-on: https://go-review.googlesource.com/c/go/+/227961
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Munday <mike.munday@ibm.com>
This commit is contained in:
Keith Randall 2020-04-11 19:51:09 -07:00
parent 7580937524
commit 2f84caebe3
5 changed files with 336 additions and 519 deletions
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18
src/cmd/compile/internal/ssa/rewrite.go
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@ -593,10 +593,26 @@ func float32ToAuxInt(f float32) int64 {
func float64ToAuxInt(f float64) int64 {
return int64(math.Float64bits(f))
}
func ValAndOffToAuxInt(v ValAndOff) int64 {
func valAndOffToAuxInt(v ValAndOff) int64 {
return int64(v)
}
func auxToString(i interface{}) string {
return i.(string)
}
func auxToSym(i interface{}) Sym {
// TODO: kind of a hack - allows nil interface through
s, _ := i.(Sym)
return s
}
func stringToAux(s string) interface{} {
return s
}
func symToAux(s Sym) interface{} {
return s
}
// uaddOvf reports whether unsigned a+b would overflow.
func uaddOvf(a, b int64) bool {
return uint64(a)+uint64(b) < uint64(a)