From 9db3ea46cb7bd6bdf108d314daffd0dfd50a73fe Mon Sep 17 00:00:00 2001 From: Jakob Stoklund Olesen Date: Tue, 10 Aug 2010 18:37:40 +0000 Subject: Implement register class inflation. When splitting a live range, the new registers have fewer uses and the permissible register class may be less constrained. Recompute the register class constraint from the uses of new registers created for a split. This may let them be allocated from a larger set, possibly avoiding a spill. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110703 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SplitKit.cpp | 1 + 1 file changed, 1 insertion(+) (limited to 'lib/CodeGen/SplitKit.cpp') diff --git a/lib/CodeGen/SplitKit.cpp b/lib/CodeGen/SplitKit.cpp index b7af73f627..ddd95e6adc 100644 --- a/lib/CodeGen/SplitKit.cpp +++ b/lib/CodeGen/SplitKit.cpp @@ -571,6 +571,7 @@ void SplitEditor::rewrite() { VirtRegAuxInfo vrai(vrm_.getMachineFunction(), lis_, sa_.loops_); for (unsigned i = firstInterval, e = intervals_.size(); i != e; ++i) { LiveInterval &li = *intervals_[i]; + vrai.CalculateRegClass(li.reg); vrai.CalculateWeightAndHint(li); } } -- cgit v1.2.3-70-g09d2