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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2018-05-19 12:51:59 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2018-05-19 12:51:59 +0000 |
| commit | a76b64ff80183cb088a7400dee60e82d99adabb5 (patch) | |
| tree | 5d7071289f8693e0face2a6558b65937fe97cc87 /llvm/lib/Transforms/Scalar/MergeICmps.cpp | |
| parent | ede0e4073e927fe690712a71f3c05586b476f0df (diff) | |
| download | bcm5719-llvm-a76b64ff80183cb088a7400dee60e82d99adabb5.tar.gz bcm5719-llvm-a76b64ff80183cb088a7400dee60e82d99adabb5.zip | |
[MergeICmps] Don't crash when memcmp is not available
Fixes clang crashing with -fno-builtin, PR37527.
llvm-svn: 332808
Diffstat (limited to 'llvm/lib/Transforms/Scalar/MergeICmps.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/MergeICmps.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Scalar/MergeICmps.cpp b/llvm/lib/Transforms/Scalar/MergeICmps.cpp index 57dd2292dfb..ff0183a8ea2 100644 --- a/llvm/lib/Transforms/Scalar/MergeICmps.cpp +++ b/llvm/lib/Transforms/Scalar/MergeICmps.cpp @@ -768,6 +768,10 @@ PreservedAnalyses MergeICmps::runImpl(Function &F, const TargetLibraryInfo *TLI, // The rationale is to avoid turning small chains into memcmp calls. if (!TTI->enableMemCmpExpansion(true)) return PreservedAnalyses::all(); + // If we don't have memcmp avaiable we can't emit calls to it. + if (!TLI->has(LibFunc_memcmp)) + return PreservedAnalyses::all(); + bool MadeChange = false; for (auto BBIt = ++F.begin(); BBIt != F.end(); ++BBIt) { |
