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| author | Chris Lattner <sabre@nondot.org> | 2007-08-28 04:23:55 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2007-08-28 04:23:55 +0000 |
| commit | adf2e34ef48d49c38d6bec9913669b307c2a0b84 (patch) | |
| tree | 1e184ba185e621fc27a04470dc373b66de02f478 /lib | |
| parent | ac7c7c20c27f30c8da64d2e48d95b4ea26760d84 (diff) | |
| download | external_llvm-adf2e34ef48d49c38d6bec9913669b307c2a0b84.tar.gz external_llvm-adf2e34ef48d49c38d6bec9913669b307c2a0b84.tar.bz2 external_llvm-adf2e34ef48d49c38d6bec9913669b307c2a0b84.zip | |
Cut off crazy computation. This helps PR1622 slightly.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41522 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index 416e1f012a..218da9773d 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -8283,6 +8283,10 @@ static bool DeadPHICycle(PHINode *PN, // Remember this node, and if we find the cycle, return. if (!PotentiallyDeadPHIs.insert(PN)) return true; + + // Don't scan crazily complex things. + if (PotentiallyDeadPHIs.size() == 16) + return false; if (PHINode *PU = dyn_cast<PHINode>(PN->use_back())) return DeadPHICycle(PU, PotentiallyDeadPHIs); |