103 lines
1.3 KiB
C
103 lines
1.3 KiB
C
#include "gc.h"
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int
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machcap(Node *n)
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{
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if(n == Z)
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return 1; /* test */
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switch(n->op){
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case OADD:
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case OAND:
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case OOR:
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case OSUB:
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case OXOR:
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if(typev[n->left->type->etype])
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return 1;
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break;
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case OMUL:
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case OLMUL:
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case OASLMUL:
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return 1;
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case OASMUL:
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return !mixedasop(n->type, n->right->type);
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case OLSHR:
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case OASHR:
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case OASHL:
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case OASASHL:
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case OASASHR:
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case OASLSHR:
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return 1;
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case OCAST:
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if(typev[n->type->etype]) {
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if(!typefd[n->left->type->etype])
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return 1;
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} else if(!typefd[n->type->etype]) {
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if(typev[n->left->type->etype])
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return 1;
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}
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break;
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case OCOMMA:
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case OCOND:
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case OLIST:
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case OANDAND:
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case OOROR:
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case ONOT:
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return 1;
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case OCOM:
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case ONEG:
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if(typechl[n->left->type->etype])
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return 1;
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if(typev[n->left->type->etype])
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return 1;
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return 0;
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case OASADD:
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case OASSUB:
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return !mixedasop(n->type, n->right->type);
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case OASAND:
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case OASOR:
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case OASXOR:
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return 1;
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case OPOSTINC:
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case OPOSTDEC:
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case OPREINC:
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case OPREDEC:
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return 1;
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case OEQ:
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case ONE:
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case OLE:
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case OGT:
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case OLT:
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case OGE:
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case OHI:
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case OHS:
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case OLO:
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case OLS:
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return 1;
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case ODIV:
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case OLDIV:
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case OLMOD:
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case OMOD:
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return 0;
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case OASDIV:
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case OASLDIV:
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case OASLMOD:
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case OASMOD:
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return 0;
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}
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return 0;
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}
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