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| author | Owen Anderson <resistor@mac.com> | 2008-04-29 06:34:55 +0000 |
|---|---|---|
| committer | Owen Anderson <resistor@mac.com> | 2008-04-29 06:34:55 +0000 |
| commit | 7fb4a8a4d8479d1d47d93a4c712f40805dfcc471 (patch) | |
| tree | 2117327787ebf981b7f1dde1d6c7248a595b4388 /lib/Transforms/Scalar | |
| parent | 97b0f0be8aaffcfdc6c36d8f7bf35f5edab2fb34 (diff) | |
| download | external_llvm-7fb4a8a4d8479d1d47d93a4c712f40805dfcc471.zip external_llvm-7fb4a8a4d8479d1d47d93a4c712f40805dfcc471.tar.gz external_llvm-7fb4a8a4d8479d1d47d93a4c712f40805dfcc471.tar.bz2 | |
Clarify what we mean by a dead loop.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50406 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Scalar')
| -rw-r--r-- | lib/Transforms/Scalar/DeadLoopElimination.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/DeadLoopElimination.cpp b/lib/Transforms/Scalar/DeadLoopElimination.cpp index 3ae59c3..fc11cab 100644 --- a/lib/Transforms/Scalar/DeadLoopElimination.cpp +++ b/lib/Transforms/Scalar/DeadLoopElimination.cpp @@ -126,6 +126,10 @@ bool DeadLoopElimination::IsLoopDead(Loop* L) { return true; } +/// runOnLoop - Remove dead loops, by which we mean loops that do not impact the +/// observable behavior of the program other than finite running time. Note +/// we do ensure that this never remove a loop that might be infinite, as doing +/// so could change the halting/non-halting nature of a program. bool DeadLoopElimination::runOnLoop(Loop* L, LPPassManager& LPM) { // Don't remove loops for which we can't solve the trip count. // They could be infinite, in which case we'd be changing program behavior. |