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| author | Chris Lattner <sabre@nondot.org> | 2004-03-16 19:52:53 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2004-03-16 19:52:53 +0000 |
| commit | 91408eba1890fd763e058963ee9cecbfde2039f9 (patch) | |
| tree | dd7f1bd7c7fc3305cedaedbf602e4222ce9245f2 | |
| parent | a2f652d420ef3023fe105602481f750cbbbf88c5 (diff) | |
| download | external_llvm-91408eba1890fd763e058963ee9cecbfde2039f9.zip external_llvm-91408eba1890fd763e058963ee9cecbfde2039f9.tar.gz external_llvm-91408eba1890fd763e058963ee9cecbfde2039f9.tar.bz2 | |
Punt if we see gigantic PHI nodes. This improves a huge interpreter loop
testcase from 32.5s in -raise to take .3s
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12443 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Transforms/ExprTypeConvert.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Transforms/ExprTypeConvert.cpp b/lib/Transforms/ExprTypeConvert.cpp index 9fc9c93..b30ddf1 100644 --- a/lib/Transforms/ExprTypeConvert.cpp +++ b/lib/Transforms/ExprTypeConvert.cpp @@ -206,6 +206,9 @@ bool llvm::ExpressionConvertibleToType(Value *V, const Type *Ty, } case Instruction::PHI: { PHINode *PN = cast<PHINode>(I); + // Be conservative if we find a giant PHI node. + if (PN->getNumIncomingValues() > 32) return false; + for (unsigned i = 0; i < PN->getNumIncomingValues(); ++i) if (!ExpressionConvertibleToType(PN->getIncomingValue(i), Ty, CTMap, TD)) return false; @@ -815,6 +818,9 @@ static bool OperandConvertibleToType(User *U, Value *V, const Type *Ty, case Instruction::PHI: { PHINode *PN = cast<PHINode>(I); + // Be conservative if we find a giant PHI node. + if (PN->getNumIncomingValues() > 32) return false; + for (unsigned i = 0; i < PN->getNumIncomingValues(); ++i) if (!ExpressionConvertibleToType(PN->getIncomingValue(i), Ty, CTMap, TD)) return false; |