diff options
Diffstat (limited to 'src/cmd/5g/ggen.c')
| -rw-r--r-- | src/cmd/5g/ggen.c | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/src/cmd/5g/ggen.c b/src/cmd/5g/ggen.c index 0bc1b38fc..d5b00b34d 100644 --- a/src/cmd/5g/ggen.c +++ b/src/cmd/5g/ggen.c @@ -22,6 +22,32 @@ defframe(Prog *ptxt) maxstksize = 0; } +// Sweep the prog list to mark any used nodes. +void +markautoused(Prog* p) +{ + for (; p; p = p->link) { + if (p->from.name == D_AUTO && p->from.node) + p->from.node->used++; + + if (p->to.name == D_AUTO && p->to.node) + p->to.node->used++; + } +} + +// Fixup instructions after compactframe has moved all autos around. +void +fixautoused(Prog* p) +{ + for (; p; p = p->link) { + if (p->from.name == D_AUTO && p->from.node) + p->from.offset += p->from.node->stkdelta; + + if (p->to.name == D_AUTO && p->to.node) + p->to.offset += p->to.node->stkdelta; + } +} + /* * generate: * call f @@ -147,13 +173,13 @@ cgen_callinter(Node *n, Node *res, int proc) nodindreg(&nodsp, types[tptr], REGSP); nodsp.xoffset = 4; nodo.xoffset += widthptr; - cgen(&nodo, &nodsp); // 4(SP) = 8(REG) -- i.s + cgen(&nodo, &nodsp); // 4(SP) = 4(REG) -- i.data nodo.xoffset -= widthptr; - cgen(&nodo, &nodr); // REG = 0(REG) -- i.m + cgen(&nodo, &nodr); // REG = 0(REG) -- i.tab nodo.xoffset = n->left->xoffset + 3*widthptr + 8; - cgen(&nodo, &nodr); // REG = 32+offset(REG) -- i.m->fun[f] + cgen(&nodo, &nodr); // REG = 20+offset(REG) -- i.tab->fun[f] // BOTCH nodr.type = fntype; nodr.type = n->left->type; |