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| author | Andrew Trick <atrick@apple.com> | 2011-10-05 03:25:31 +0000 |
|---|---|---|
| committer | Andrew Trick <atrick@apple.com> | 2011-10-05 03:25:31 +0000 |
| commit | 3a86ba767c7efbb9a6c2e4916fca9590a7664bd2 (patch) | |
| tree | 13f3fe3ad3f5d92efd66c417d1e82f4bf0582021 /llvm/lib/Bitcode/Reader/BitcodeReader.cpp | |
| parent | 252d0ede74c2b25e47fde262ef3152feabf5d635 (diff) | |
| download | llvm-3a86ba767c7efbb9a6c2e4916fca9590a7664bd2.zip llvm-3a86ba767c7efbb9a6c2e4916fca9590a7664bd2.tar.gz llvm-3a86ba767c7efbb9a6c2e4916fca9590a7664bd2.tar.bz2 | |
Avoid exponential recursion in SCEV getConstantEvolvingPHI and EvaluateExpression.
Note to compiler writers: never recurse on multiple instruction
operands without memoization.
Fixes rdar://10187945. Was taking 45s, now taking 5ms.
llvm-svn: 141161
Diffstat (limited to 'llvm/lib/Bitcode/Reader/BitcodeReader.cpp')
0 files changed, 0 insertions, 0 deletions