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cmd/9g: use REGZERO instead of REG_R0 if we want the zero register

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This will make the intention clearer.
This is migrated from pre-c2go CL 4930.

Change-Id: I9103126a05323daedd729a43b94b2be8cd7408c9
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/7410
Reviewed-by: Austin Clements <austin@google.com>
This commit is contained in:
Shenghou Ma 2015-03-11 13:05:24 -04:00 committed by Minux Ma
parent 9dfbcd8fac
commit 1e1c9dc2c8
1 changed files with 5 additions and 5 deletions
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10
src/cmd/9g/ggen.go
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@ -223,7 +223,7 @@ func ginscall(f *gc.Node, proc int) {
gc.Nodreg(&reg, gc.Types[gc.TINT64], ppc64.REG_R3)
p := gins(ppc64.ACMP, &reg, nil)
p.To.Type = obj.TYPE_REG
p.To.Reg = ppc64.REG_R0
p.To.Reg = ppc64.REGZERO
p = gc.Gbranch(ppc64.ABEQ, nil, +1)
cgen_ret(nil)
gc.Patch(p, gc.Pc)
@ -745,7 +745,7 @@ func clearfat(nl *gc.Node) {
}
var r0 gc.Node
gc.Nodreg(&r0, gc.Types[gc.TUINT64], ppc64.REG_R0) // r0 is always zero
gc.Nodreg(&r0, gc.Types[gc.TUINT64], ppc64.REGZERO)
var dst gc.Node
gc.Nodreg(&dst, gc.Types[gc.Tptr], ppc64.REGRT1)
reg[ppc64.REGRT1-ppc64.REG_R0]++
@ -841,7 +841,7 @@ func expandchecks(firstp *obj.Prog) {
p->from.type = TYPE_CONST;
p->from.offset = 4;
p->from.reg = 0;
p->reg = REG_R0;
p->reg = REGZERO;
p->to.type = TYPE_REG;
p->to.reg = reg;
*/
@ -876,9 +876,9 @@ func expandchecks(firstp *obj.Prog) {
p2.As = ppc64.AMOVD
p2.From.Type = obj.TYPE_REG
p2.From.Reg = ppc64.REG_R0
p2.From.Reg = ppc64.REGZERO
p2.To.Type = obj.TYPE_MEM
p2.To.Reg = ppc64.REG_R0
p2.To.Reg = ppc64.REGZERO
p2.To.Offset = 0
}
}