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| author | Owen Anderson <resistor@mac.com> | 2009-03-26 18:53:38 +0000 |
|---|---|---|
| committer | Owen Anderson <resistor@mac.com> | 2009-03-26 18:53:38 +0000 |
| commit | 5bfe6e8673cc52383c0184fe08bdb39a70625630 (patch) | |
| tree | 707bc462fca3bfc739b5a6f07c350b915591779c /lib/CodeGen/LiveIntervalAnalysis.cpp | |
| parent | da95ec859c996b81bcf855f1606fce847635bcdb (diff) | |
| download | external_llvm-5bfe6e8673cc52383c0184fe08bdb39a70625630.zip external_llvm-5bfe6e8673cc52383c0184fe08bdb39a70625630.tar.gz external_llvm-5bfe6e8673cc52383c0184fe08bdb39a70625630.tar.bz2 | |
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
Diffstat (limited to 'lib/CodeGen/LiveIntervalAnalysis.cpp')
| -rw-r--r-- | lib/CodeGen/LiveIntervalAnalysis.cpp | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp index cd6f81c..8c7fa1b 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 |