diff options
| -rw-r--r-- | ir/regalloc.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/ir/regalloc.c b/ir/regalloc.c index 3642d36..51ccdab 100644 --- a/ir/regalloc.c +++ b/ir/regalloc.c @@ -831,7 +831,7 @@ linearscan(struct rega *ra) handled = it; if (it->alloc.t == AREG) { ra->free |= 1<<it->alloc.a; - //DBG(" unblock %s\n", mctarg->rnames[it->reg]); + //DBG(" unblock %s %X\n", mctarg->rnames[it->alloc.a], ra->free); } else if (it->alloc.t == ASTACK) { freestk(ra, it->alloc.a); } @@ -905,12 +905,14 @@ linearscan(struct rega *ra) rsclr(&free, it->alloc.a); } } - /* for 2-address instrs, exclude reg from 2nd arg */ + /* for 2-address instrs, exclude reg from 2nd arg (unless arg#1 == arg#2) */ if (ins->inplace && opnarg[ins->op] == 2) { int xreg; if (ins->r.t == RREG) rsclr(&free, ins->r.i); - else if (ins->r.t == RTMP && (xreg = instrtab[ins->r.i].reg)) - rsclr(&free, xreg-1); + else if (ins->r.t == RTMP && (xreg = instrtab[ins->r.i].reg)) { + if (ins->r.bits != ins->l.bits) + rsclr(&free, xreg-1); + } } if (!free) { |