From b98bbb7597495fb401b020679a94389298175506 Mon Sep 17 00:00:00 2001 From: Owen Anderson Date: Thu, 26 Mar 2009 18:53:38 +0000 Subject: [PATCH] Don't assign a new stack slot if the pre-alloc splitter already assigned one. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67764 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/LiveIntervalAnalysis.cpp | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp index cd6f81c6eb2..8c7fa1b1ac2 100644 --- a/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -1973,8 +1973,15 @@ addIntervalsForSpills(const LiveInterval &li, } // One stack slot per live interval. - if (NeedStackSlot && vrm.getPreSplitReg(li.reg) == 0) - Slot = vrm.assignVirt2StackSlot(li.reg); + if (NeedStackSlot && vrm.getPreSplitReg(li.reg) == 0) { + if (vrm.getStackSlot(li.reg) == VirtRegMap::NO_STACK_SLOT) + Slot = vrm.assignVirt2StackSlot(li.reg); + + // This case only occurs when the prealloc splitter has already assigned + // a stack slot to this vreg. + else + Slot = vrm.getStackSlot(li.reg); + } // Create new intervals and rewrite defs and uses. for (LiveInterval::Ranges::const_iterator -- 2.34.1