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-rw-r--r--ir/regalloc.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/ir/regalloc.c b/ir/regalloc.c
index f859cdd..d3c1ee0 100644
--- a/ir/regalloc.c
+++ b/ir/regalloc.c
@@ -519,7 +519,7 @@ usereg(struct rega *ra, int reg, struct block *blk, int pos)
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) {
if (fxit->range.from > pos) break;
- if (fxit->rs == 1<<reg && fxit->range.from <= pos && pos <= fxit->range.to) {
+ if (fxit->rs == 1<<reg && fxit->range.from <= pos && pos < fxit->range.to) {
/* contained by existing interval */
fxit->range.from = blk->inumstart;
return;
@@ -619,7 +619,7 @@ buildintervals(struct rega *ra)
if (ins->op == Omove) {
assert(ins->l.t == RREG);
if (ins->l.bits == ins->r.bits) /* special case `move Rx,Rx`: clobber reg, not a real use */
- usereg(ra, ins->l.i, blk, pos+1); /* +1 to avoid empty interval [pos,pos) */
+ usereg(ra, ins->l.i, blk, pos);
defreg(ra, ins->l.i, pos);
if (ins->l.bits == ins->r.bits)
continue;