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Added an assert to the PBQP allocator to catch infinite cost solutions which might otherwise lead to miscompilations.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88829 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Lang Hames 2009-11-15 04:39:51 +00:00
parent 40c67b5832
commit e98b4b0695
1 changed files with 5 additions and 0 deletions
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5
lib/CodeGen/RegAllocPBQP.cpp
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@ -693,6 +693,11 @@ void PBQPRegAlloc::addStackInterval(const LiveInterval *spilled,
} }
bool PBQPRegAlloc::mapPBQPToRegAlloc(const PBQP::Solution &solution) { 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 // Set to true if we have any spills
bool anotherRoundNeeded = false; bool anotherRoundNeeded = false;