Undo tweak. It had no obvious benefit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48341 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAllocLinearScan.cpp b/lib/CodeGen/RegAllocLinearScan.cpp
index 12e7d6a..2713771 100644
--- a/lib/CodeGen/RegAllocLinearScan.cpp
+++ b/lib/CodeGen/RegAllocLinearScan.cpp
@@ -687,25 +687,10 @@
// All registers must have inf weight. Just grab one!
if (!minReg) {
- if (BestPhysReg)
- minReg = BestPhysReg;
- else {
- // Get the physical register with the fewest conflicts.
- unsigned MinConflicts = ~0U;
- for (TargetRegisterClass::iterator i = RC->allocation_order_begin(*mf_),
- e = RC->allocation_order_end(*mf_); i != e; ++i) {
- unsigned reg = *i;
- unsigned NumConflicts = li_->getNumConflictsWithPhysReg(*cur, reg);
- if (NumConflicts <= MinConflicts) {
- MinConflicts = NumConflicts;
- minReg = reg;
- }
- }
- }
-
- if (cur->weight == HUGE_VALF || cur->getSize() == 1)
- // Spill a physical register around defs and uses.
- li_->spillPhysRegAroundRegDefsUses(*cur, minReg, *vrm_);
+ minReg = BestPhysReg ? BestPhysReg : *RC->allocation_order_begin(*mf_);
+ if (cur->weight == HUGE_VALF || cur->getSize() == 1)
+ // Spill a physical register around defs and uses.
+ li_->spillPhysRegAroundRegDefsUses(*cur, minReg, *vrm_);
}
}