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[dev.power64] cmd/9g: do not ignore move instructions even if from and to are samaddr() 

Those moves might be significant (e.g. narrowing or widening): on Power64,
we don't distinguish between MOVWD and MOVW.

This fixes divmode.go and bug447.go.

LGTM=rsc
R=rsc, iant
CC=golang-codereviews
https://golang.org/cl/125200043
This commit is contained in:
Shenghou Ma 2014-08-13 11:39:07 -04:00 committed by Russ Cox
parent b6d6eb21ec
commit f285537b7f
2 changed files with 0 additions and 26 deletions
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1
src/cmd/9g/gg.h
View File

@ -62,7 +62,6 @@ vlong fieldoffset(Type*, Node*);
void sgen(Node*, Node*, int64);
void gmove(Node*, Node*);
Prog* gins(int, Node*, Node*);
int samaddr(Node*, Node*);
void naddr(Node*, Addr*, int);
void cgen_aret(Node*, Node*);
int componentgen(Node*, Node*);

25
src/cmd/9g/gsubr.c
View File

@ -1006,21 +1006,6 @@ hard:
return;
}
int
samaddr(Node *f, Node *t)
{
if(f->op != t->op)
return 0;
switch(f->op) {
case OREGISTER:
if(f->val.u.reg != t->val.u.reg)
break;
return 1;
}
return 0;
}
/*
* generate one instruction:
* as f, t
@ -1032,16 +1017,6 @@ gins(int as, Node *f, Node *t)
Prog *p;
Addr af, at;
switch(as) {
case AMOVW:
case AMOVD:
case AFMOVS:
case AFMOVD:
if(f != N && t != N && samaddr(f, t))
return nil;
break;
}
memset(&af, 0, sizeof af);
memset(&at, 0, sizeof at);
if(f != N)