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| author | Lang Hames <lhames@gmail.com> | 2009-11-15 04:39:51 +0000 |
|---|---|---|
| committer | Lang Hames <lhames@gmail.com> | 2009-11-15 04:39:51 +0000 |
| commit | e98b4b0695f727dda44c366f5de906edf06cf7e9 (patch) | |
| tree | 3deb18c2018a4d452948385cf40a45f89041145a /lib/CodeGen/RegAllocPBQP.cpp | |
| parent | 40c67b5832877935a555fc63bfaa735332c79700 (diff) | |
| download | external_llvm-e98b4b0695f727dda44c366f5de906edf06cf7e9.zip external_llvm-e98b4b0695f727dda44c366f5de906edf06cf7e9.tar.gz external_llvm-e98b4b0695f727dda44c366f5de906edf06cf7e9.tar.bz2 | |
Added an assert to the PBQP allocator to catch infinite cost solutions which might otherwise lead to miscompilations.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88829 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/RegAllocPBQP.cpp')
| -rw-r--r-- | lib/CodeGen/RegAllocPBQP.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/CodeGen/RegAllocPBQP.cpp b/lib/CodeGen/RegAllocPBQP.cpp index 5757e47..c677d34 100644 --- a/lib/CodeGen/RegAllocPBQP.cpp +++ b/lib/CodeGen/RegAllocPBQP.cpp @@ -693,6 +693,11 @@ void PBQPRegAlloc::addStackInterval(const LiveInterval *spilled, } bool PBQPRegAlloc::mapPBQPToRegAlloc(const PBQP::Solution &solution) { + + // Assert that this is a valid solution to the regalloc problem. + assert(solution.getCost() != std::numeric_limits<PBQP::PBQPNum>::infinity() && + "Invalid (infinite cost) solution for PBQP problem."); + // Set to true if we have any spills bool anotherRoundNeeded = false; |