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| author | rdivacky <rdivacky@FreeBSD.org> | 2010-04-06 15:52:58 +0000 |
|---|---|---|
| committer | rdivacky <rdivacky@FreeBSD.org> | 2010-04-06 15:52:58 +0000 |
| commit | 5f970ec96e421f64db6b1c6509a902ea73d98cc7 (patch) | |
| tree | 0dd020f28a4846707f8d60717d9b2921ea187bd8 /lib/CodeGen/MachineSink.cpp | |
| parent | 62cc576dca6a6aa62c0424f0a1e93a0a679d4c8a (diff) | |
| download | FreeBSD-src-5f970ec96e421f64db6b1c6509a902ea73d98cc7.zip FreeBSD-src-5f970ec96e421f64db6b1c6509a902ea73d98cc7.tar.gz | |
Update LLVM to r100520.
Diffstat (limited to 'lib/CodeGen/MachineSink.cpp')
| -rw-r--r-- | lib/CodeGen/MachineSink.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/CodeGen/MachineSink.cpp b/lib/CodeGen/MachineSink.cpp index e47ba7c..e659619 100644 --- a/lib/CodeGen/MachineSink.cpp +++ b/lib/CodeGen/MachineSink.cpp @@ -126,6 +126,11 @@ bool MachineSinking::ProcessBlock(MachineBasicBlock &MBB) { // Can't sink anything out of a block that has less than two successors. if (MBB.succ_size() <= 1 || MBB.empty()) return false; + // Don't bother sinking code out of unreachable blocks. In addition to being + // unprofitable, it can also lead to infinite looping, because in an unreachable + // loop there may be nowhere to stop. + if (!DT->isReachableFromEntry(&MBB)) return false; + bool MadeChange = false; // Walk the basic block bottom-up. Remember if we saw a store. |
