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gc: include struct field tags in type equality
R=ken2 CC=golang-dev https://golang.org/cl/1667048
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@ -1725,6 +1725,18 @@ cplxsubtype(int et)
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return 0;
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}
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static int
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eqnote(Strlit *a, Strlit *b)
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{
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if(a == b)
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return 1;
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if(a == nil || b == nil)
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return 0;
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if(a->len != b->len)
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return 0;
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return memcmp(a->s, b->s, a->len) == 0;
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}
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// Return 1 if t1 and t2 are identical, following the spec rules.
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//
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// Any cyclic type must go through a named type, and if one is
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@ -1745,7 +1757,7 @@ eqtype(Type *t1, Type *t2)
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for(t1=t1->type, t2=t2->type; t1 && t2; t1=t1->down, t2=t2->down) {
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if(t1->etype != TFIELD || t2->etype != TFIELD)
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fatal("struct/interface missing field: %T %T", t1, t2);
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if(t1->sym != t2->sym || t1->embedded != t2->embedded || !eqtype(t1->type, t2->type))
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if(t1->sym != t2->sym || t1->embedded != t2->embedded || !eqtype(t1->type, t2->type) || !eqnote(t1->note, t2->note))
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return 0;
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}
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return t1 == T && t2 == T;
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