From 6abf37c8aa70df316db6aa7859a98ae413517f73 Mon Sep 17 00:00:00 2001 From: David Greene Date: Thu, 22 May 2008 21:16:33 +0000 Subject: When rewriting defs and uses after spilling, don't set the weight of a live interval to infinity if the instruction being rewritten is an original remat def instruction. We were only checking against the clone of the remat def which doesn't actually appear in the IR at all. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51440 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/LiveIntervalAnalysis.cpp | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'lib') diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp index 2558b09..4997302 100644 --- a/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -1150,7 +1150,9 @@ rewriteInstructionsForSpills(const LiveInterval &li, bool TrySplit, } MachineBasicBlock *MBB = MI->getParent(); - if (ImpUse && MI != ReMatDefMI) { + // ReMatDefMI is a clone and not in the IR at all, so check + // RefMatOrigDefMI too. + if (ImpUse && MI != ReMatDefMI && MI != ReMatOrigDefMI) { // Re-matting an instruction with virtual register use. Update the // register interval's spill weight to HUGE_VALF to prevent it from // being spilled. -- cgit v1.1