diff options
Diffstat (limited to 'ir/regalloc.c')
| -rw-r--r-- | ir/regalloc.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/ir/regalloc.c b/ir/regalloc.c index d3c1ee0..e060ebf 100644 --- a/ir/regalloc.c +++ b/ir/regalloc.c @@ -517,11 +517,18 @@ usereg(struct rega *ra, int reg, struct block *blk, int pos) { struct fixinterval *fxit; if (rstest(mctarg->rglob, reg)) return; /* regalloc never allocates globally live regs, so don't need intervals for those */ - for (struct fixinterval *fxit = ra->intervals.fixed; fxit; fxit = fxit->next) { + for (struct fixinterval *prev = NULL, *fxit = ra->intervals.fixed; fxit; prev = fxit, fxit = fxit->next) { if (fxit->range.from > pos) break; if (fxit->rs == 1<<reg && fxit->range.from <= pos && pos < fxit->range.to) { /* contained by existing interval */ fxit->range.from = blk->inumstart; + /* insert at head */ + //DBG(">>>extend REG %s range %d-%d\n", mctarg->rnames[reg], fxit->range.from, fxit->range.to); + if (prev) { + prev->next = fxit->next; + fxit->next = ra->intervals.fixed; + ra->intervals.fixed = fxit; + } return; } } @@ -539,7 +546,7 @@ defreg(struct rega *ra, int reg, int pos) { if (fxit->rs == 1<<reg) { assert(fxit->range.from <= pos); fxit->range.from = pos; - // DBG(">>>REG %s range @%d: %d-%d\n", mctarg->rnames[reg], fxit->range.from.blk, fxit->range.from.ins, fxit->range.to.ins); + //DBG(">>>def REG %s range %d-%d\n", mctarg->rnames[reg], fxit->range.from, fxit->range.to); return; } } @@ -643,9 +650,9 @@ buildintervals(struct rega *ra) ra->intervals.fixed = fxit; } for (int j = call->narg - 1; j >= 0; --j) { - int reg = call->abiarg[j].reg; - if (reg >= 0) { - usereg(ra, reg, blk, pos); + struct abiarg abi = call->abiarg[j]; + if (!abi.isstk) { + usereg(ra, abi.reg, blk, pos); } } } |